FCC ID: IHDP56JE1 Cellular/ PCS CDMA Transceiver Module

C24 Hardware Interface Manual Version 0.3 C24 Hardware Interface Manual C24 CDMA 1X Module Nov 14, 2008 Version 0.3 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Table of Contents REVISION HISTORY....................................................................................................................................3 1 REGULATORY REQUIREMENT...........................................................................................................4 1.1 SAFETY STATEMENT AND REQUIREMENTS ..............................................................................................4 1.2 ANTENNA AND TRANSMISSION SAFETY PRECAUTIONS.............................................................................5 2 HARDWARE INTERFACE DESCRIPTION...........................................................................................7 2.1 OPERATING MODES ...............................................................................................................................7 2.2 POWER SUPPLY.....................................................................................................................................8 2.2.1 POWER CONSUMPTION........................................................................................................................8 2.3 POWER ON/OFF OPERATION..................................................................................................................9 2.3.1 TURNING THE MODULE ON...................................................................................................................9 2.3.2 TURNING THE MODULE OFF...............................................................................................................10 2.4 LOW POWER MODE .............................................................................................................................12 2.4.1 ACTIVATING LOW POWER MODE ........................................................................................................12 2.4.2 SERIAL INTERFACE DURING LOW POWER MODE .................................................................................13 2.4.3 TERMINATING LOW POWER MODE.......................................................................................................13 2.5 REAL TIME CLOCK...............................................................................................................................16 2.6 SERIAL INTERFACES ............................................................................................................................17 2.6.1 PRIMARY UART (UART1).................................................................................................................17 2.6.2 SECONDARY UART (UART2) ...........................................................................................................18 2.6.3 USB INTERFACE ...............................................................................................................................19 2.7 REMOVABLE-USER IDENTIFY MODULE (R-UIM) INTERFACE...................................................................20 2.8 AUDIO INTERFACE................................................................................................................................21 2.8.1 HANDSET MICROPHONE PORT...........................................................................................................21 2.8.2 HEADSET MICROPHONE PORT ...........................................................................................................22 2.8.3 SPEAKER PORT.................................................................................................................................23 2.8.4 HEADSET DETECTION........................................................................................................................24 2.8.5 ALERT LOUDSPEAKER PORT..............................................................................................................24 2.8.6 DIGITAL AUDIO INTERFACE ................................................................................................................25 2.8.7 AUDIO OPERATING MODES................................................................................................................26 2.8.8 AUDIO PROGRAMMING INTERFACE .....................................................................................................27 2.9 A/D INTERFACE ...................................................................................................................................30 2.9.1 POWER SUPPLY A/D .........................................................................................................................30 2.9.2 BATTERY TEMPERATURE A/D ............................................................................................................30 2.9.3 GENERAL PURPOSE A/D ...................................................................................................................31 2.10 CONTROL AND INDICATORS INTERFACE ..............................................................................................32 2.10.1 RESET............................................................................................................................................32 2.10.2 VREF REFERENCE REGULATOR......................................................................................................32 2.10.3 WAKE-UP OUT................................................................................................................................33 2.10.4 ANTENNA DETECTION......................................................................................................................34 2.10.5 CDMA NW DETECTION ..................................................................................................................35 2.10.6 TRANSMISSION INDICATOR...............................................................................................................35 2.10.7 GENERAL PURPOSE I/O ..................................................................................................................35 2.11 ANTENNA INTERFACE.........................................................................................................................36 Motorola General Business Use Page 2 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Revision History Version 0.01 0.02 0.03 0.1 David Alfi Nimrod Zarmi Author Carlos Dyk, Date 17-Oct-07 Initial Draft 25-Dec-07 Parameters spec updated, Audio updated 21-Feb-08 Updating following fianl review 5-Oct-08 Nimrod Zarmi Updating Regulatory approvals requirements 11-Nov-08 Update max output power to 25dBm Update VSWR to 2.5:1 14-Nov-08 Update maximum allowable gain at 1900 MHz to maximum of 4.2 dBi Steve Gump Udi Hadar 0.2 0.3 Motorola General Business Use Page 3 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 1 Regulatory Requirement The C24 module is compliant with applicable FCC and IC requirements. The integrated system incorporating the C24 module may be subject to further regulations and standards. Motorola strongly recommends that the system integrator seeks professional advice regarding the regulations and standards that apply to their product. The Federal Communications Commission (FCC) requires application for certification of digital devices in accordance with CFR Title 47, Part 2 and Part 15. This includes Electromagnetic Energy Exposure (EME) testing. As the C24 modem is not a standalone transceiver but is an integrated module, the C24 cannot be tested by itself for EME certification. It is, however, the integrators responsibility to have the completed device tested for EME certification. The C24 module is compliant to FCC and IC requirements allowing use within North America. Use in other regions may require regional "type approvals" which the manufacturer of the final product integration or reseller will be responsible for procuring. Many regional type approvals are based upon compliance to FCC and other standards that the C24 is compliant with. It is strongly recommended that professional advice be sought before placing the finished integrated product on the market to establish local approval and marking requirements. 1.1 Safety Statement and Requirements Certain safety precautions must be observed during all phases of the operation, usage, service or repair of any cellular terminal or mobile incorporating the C24 module. The integrator is advised to consider the following general cautions in the context of their integrated system incorporating the C24 module, and to provide the end user with the applicable warnings and advice of safe operation of the equipment. Failure to comply with these precautions violates safety standards of design, manufacture and intended use of the product. Motorola assumes no liability for customer failure to comply with these precautions. The C24 must be operated at the voltages described in the technical documentation The C24 must not be mechanically nor electrically changed. Use of connectors should follow the guidance of the technical documentation The integrated product incorporating the C24 moduel must be evaluated for SAR under intended use conditions, and suitable text and SAR values be provided to the end user No wireless device can guarantee operation at all times due to network or interference conditions, A user should never rely on a wireless device as the sole means of making emergency calls The C24 module complies with all applicable standards and directives, this does not guarantee that the product it is integrated into complies, expert advice should be sought to identify the applicable regulations and show compliance Suitable warning statements regarding the use of RF energy in the integrated host system should be given in the end user documentation. Motorola General Business Use Page 4 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 1.2 Antenna and Transmission Safety Precautions User Operation The C24 module is normally supplied without an antenna, and is compliant with SAR requirements provided the following conditions are observed. Do not operate your unit when a person is within 8 inches (20 centimeters) of the antenna. A person or object within 8 inches (20 centimeters) of the antenna could impair call quality and may cause the phone to operate at a higher power level than necessary. Important: The unit must be installed in a manner that provides a minimum separation distance of 20 cm or more between the antenna and persons and must not be co-located or operate in conjunction with any other antenna or transmitter to satisfy FCC RF exposure requirements for mobile transmitting devices. Important: To comply with the FCC RF exposure limits and satisfy the categorical exclusion requirements for mobile transmitters, the requirements described in the following section, Antenna Installation , must be met. Antenna Installation The antenna installation must provide a minimum separation distance of 20 cm from users and nearby persons and must not be co-located or operating in conjunction with any other antenna or transmitter. The combined cable loss and antenna gain must not exceed +5.3 dBi (800 band). The combined cable loss and antenna gain must not exceed +4.2 dBi and total system output must not exceed 2.0W EIRP in the PCS (1900) band in order to comply with the EIRP limit of 24.232 (b). OEM installers must be provided with antenna installation instruction and transmitter operating conditions for satisfying RF exposure compliance. For system integrations requiring higher antenna gain, or position closer than 20cm from the body, SAR compliance testing of the completed product will be required. It is strongly recommended that the system integrator seeks the advice of a suitably accredited test laboratory to develop a test plan and carry out necessary testing. CFR 47 Part 15.19 specifies label requirements The following text may be on the product, user's manual, or container. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may cause undesired operation. CFR 47 Part 15.21 Information to user The user's manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. In cases where the manual is provided only in a form other than paper, such as on a computer disk or over the Internet, the information required by this section may be included in the manual in that alternative form, provided the user can reasonably be expected to have the capability to access information in that form. CFR 47 Part 15.105 Information to the user

(b) For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio Motorola General Business Use Page 5 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help. Motorola General Business Use Page 6 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2 Hardware Interface Description The following sections describe in detail the Hardware Interface requirements and operation modes of the C-Lite Module. 2.1 Operating Modes The module should incorporate several operating modes. Each operating mode is different in the active features and interfaces. The following table summarizes the general characteristics of the module operating modes and provides general guidelines for operation. TABLE 1 Module Operating Modes Mode Description Features Not Powered VCC supply is disconnected The interface signals are tri-stated. Module is Off. RTC Mode Idle Mode Valid VCC supply, RESET_N signal is enabled Only the internal RTC timer is active.

(low). The Module interface is tri-stated. RESET_N signal is disabled The module is fully active and ready to

(high), CTS_N and DSR_N signals are enabled (low). communicate. This is the default power-up mode. Low power Mode RESET_N signal is high, CTS_N signal is disabled The module is in low power mode. The application interfaces are disabled, but it continues to monitor the network. CSD or Data RESET_N signal is high, TXEN_N signal is Low. A voice or data call is in progress. When the call terminates, The Module will return to the last operating state

(Idle or Sleep). Motorola General Business Use Page 7 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.2 Power Supply The Module power supply must be a single external DC voltage source of 3.0V to 4.4V. Pin (s) TABLE 2 Power supply signals Signal Name Description GND VCC Main ground connection for the module. DC supply input for the module. VIN = 3.0 V to 4.4 V IMAX 600 mA at TX/RX 1-4 5-8 2.2.1 Power Consumption The following table specifies typical current consumption ratings of the module in various operating modes. The current ratings refer to the overall current consumption through the VCC supply. TABLE 3 Current ratings (VCC = 3.6 V) Parameter Description Conditions Min Typ Max Unit IOFF IIDLE RTC mode Idle mode ISLEEP Low power mode Registered

- SCI2

- TBR = 30 minutes Legend SCI2: Paging slots every 5.12 seconds TBR: Timer Base Registration IMAX Max TX/RX current 30 uA 20 mA 2.5 mA 600 mA Motorola General Business Use Page 8 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.3 Power On/Off Operation The Module power on and off process includes two primary phases, which are indicated at the interface connector by the hardware output signals RESET_N and CTS_N. The RESET_N signal indicates whether the module is powered on or off. When this signal is enabled (low), the module is powered-off. When it is disabled (high), the module is powered-on. The CTS_N signal indicates the serial communications interface (UART) status. When this signal is high, the module serial interface is tri-stated. When it is low, the serial interface is enabled, and the module is ready to communicate. These same conditions apply to the CTS2_N signal with respect to the second serial interface (UART2). TABLE 4 On-Off control signals Pin (s) Signal Name Description 51 53 IGN ON_N On - Off Logic level control On - Off toggle control 2.3.1 Turning the module On When the module power supply is stable above the minimum operating level and it is powered off, it operates in RTC mode, with only the internal RTC timer active. The C-lite consist of two HW models: basic (without charger), and charger. The basic module will power on when the ON_N signal or IGN signal is asserted. The ON_N and IGN signals will be active and responding only after the power supply to the module is stable at operating level. The charger module will power on when the ON_N signal or valid charger input voltage level is asserted

(see Charger Connectivity section). The ON_N (IGN signal is used as Charger input voltage) signal will be active and responding only after the power supply to the module is stable at operating level. 2.3.1.1 Turning on the module using ON_N An internal pull-up resistor sets the ON_N input signal high whenever a power supply is applied to the module. Asserting the ON_N signal low for a minimum of 200 milliseconds (0.2 seconds) will cause the module to turn-on. The following figure illustrates the power-on process using the ON_N signal. Motorola General Business Use Page 9 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 FIGURE 4 ON_N power-on timings VCC ON_N CTS_N RESET_N 200ms min

<5000ms 2.3.1.2 Turning on the module using IGN This section applies only for the C-Lite standard model (without charger). To turn on the module this signal must be set high. The IGN signal must remain high for the duration of the modules operation. The module powers down when the IGN signal is returned to its low state. The following figure illustrates the power-on process using the IGN signal. FIGURE 5 IGN power-on timings VCC IGN CTS_N RESET_N

<5000ms A typical IGN implementation is shortening IGN to VCC. In this method applying power to the module, shall also turn on the module simultaneously. 2.3.2 Turning the Module Off There are several ways to turn the module off:

Asserting the ON_N signal low for a minimum of 1.5 seconds.

Setting the IGN signal low

Low power automatic shut down

AT command Motorola General Business Use Page 10 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.3.2.1 Turning off the module using ON_N um of 1.5 seconds will turn the module off. This will initiate a The ON_N signal is set high through an internal pull up resistor when power is applied to the module. Asserting the ON_N signal low for a minim ormal power-off process, which includes disabling of all applications interfaces (UART, SIM card, audio, n etc.) and closing the network connection. T he following figure illustrates the power-off timings when using the ON_N signal. FIGURE 6 ON_N power off timings VCC ON_N CTS_N RESET_N 1500ms min

<50000m 2.3.2.2 Turning off the module using IGN This section applies only to the C-Lite standard model (without charger). The IGN signal may be used to power off the module only if it was also used to power it on. When the IGN signal is set low the module will turn off. This will initiate a normal power-off process, which includes disabling of all applications interfaces (UART, SIM card, audio, etc.) and closing the network connection. The IGN signal wil This delay mechanism is implemented to protect the module from unexpected tr during power up. The following figure illustrates the power-off l not power off the module before 30 seconds have elapsed since it was powered-on. ansients on the IGN line timings when using the IGN signal. FIGURE 7 IGN power off timings VCC IGN CTS_N RESET_N

<5000ms Motorola General Business Use Page 11 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.3.2.3 Turning off the module using AT+MRST The AT+MRST command initiates a system reset operation, which powers off the module. This command emulates the ON_N signal operation for power off. 2.3.2.4 Power Loss shut down A low power shut down occurs when the module senses the external power supply is below the minimal operating level of 3.0V. The module will respond by powering down automatically. 2.4 Low Power Mode The module incorporates an optional low power mode, sleep mode, in which it operates in minimum functionality, and therefore draws significantly less current. In low power mode the module network connection is not lost. It continues to monitor the network constantly for any incoming calls or data. During low power mode, all the module interface signals are inactive and are kept in their previous state, prior to activating low power mode. To save power, the modules internal clocks and circuits are shut down, and therefore serial communications is limited. The module will not enter low power mode in any case when there is data present on the serial interface or incoming from the network or an internal system task is running. Only when processing of any external or internal system task has completed, the module will enter low power mode according to the ATS24 command settings. 2.4.1 Activating Low Power Mode By default, the module powers on in Idle mode. In this mode the module interfaces and features are functional and the module is fully active. Low power mode is activated by the ATS24 command. The value set by this command determines the duration of inactivity, in seconds, the module will take before switching to low power mode. For example:

ATS24 = 1 activates low power mode within 1 second of inactivity. ATS24 = 5 activates low power mode within 5 seconds of inactivity. ATS24 = 0 disables low power mode (default). The following image illustrates the ATS24 command operation:

FIGURE 9 ATS24 Operation Motorola General Business Use Page 12 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 ATS24 Module Sleep Idle CTS_N Disabled Enabled TXD_N or RXD_N 2.4.2 Serial Interface during Low Power Mode During low power mode the serial interfaces are inactive. The module wakes up periodically from low power mode to page the network for any incoming calls or data. After this short paging is completed, it returns to low power mode. During this short awake period, the serial interfaces are enabled and communications with the module is possible. The CTS_N signal is alternately enabled and disabled synchronously with the network paging cycle. CTS_N is enabled whenever the module awakes to page the network. This indicates the serial interfaces are active. FIGURE 10 CTS signal during Sleep mode Module Sleep Idle CTS_N Disabled Enabled The periodical enabling and disabling of the CTS_N signal during low power mode can be controlled by the AT+MSCTS command. Setting AT+MSCTS=1 permanently disables the serial interface during low power mode, even during a network page. The CTS_N signal is disabled, and therefore the serial interfaces are blocked. 2.4.3 Terminating low power mode Terminating the low power mode, or wake-up, is defined as the transition of the module operating state from Sleep mode to Idle mode. There are several ways to wake-up the module from low power mode, as described below. During low power mode the modules internal clocks and circuits are disabled, in order to minimize power consumption. When terminating low power mode, and switching to Idle mode, the module requires a minimal delay time to reactivate and stabilize its internal circuits before it can respond to application data. This delay is maximum 15 milliseconds long, and is also indicated by the CTS_N signal inactive (high) state. The delay guarantees that data on the serial interface is not lost or misinterpreted. 2.4.3.1 Temporary Termination of Low Power Mode Motorola General Business Use Page 13 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Temporary termination of low power mode occurs when the module switches from Sleep mode to Idle mode for a defined period, and then returns automatically to Sleep mode. Using the WKUPI_N signal The WKUPI_N signal is an active low input, which is set high by default. By asserting this signal low the application can wake-up the module from low power mode and switch to Idle mode. The module will remain in Idle mode, awake and fully active, as long as WKUPI_N signal remains low. When this signal is set high again, the module will return to Sleep mode automatically, according to the ATS24 settings. FIGURE 11 WKUPI_N signal operation WKUPI_N Module Sleep Idle 15ms ATS24 CTS_N Disabled Enabled The WKUPI_N signal must be used to wake up the module from low power mode if the serial interface has been disabled by the AT+MSCTS command. Incoming Network Data During low power mode the module continues to monitor the network for any incoming data, message or voice call. When the module receives an indication from the network that an incoming voice call, message or data is available, it automatically wakes up from low power mode to alert the application. When it wakes up to Idle mode all the interfaces are enabled. Depending on the type of network indication and the application settings, the module may operate several methods, which are configurable by AT commands, to alert the application of the incoming data:

Enable the WKUPO_N signal to wake-up the application from low power.

Send data to the application over the serial interface.

Enable the serial interfaces Ring Indicator (RI_N) signal. Data on the Serial interface During low power mode, serial communications is limited to short periods, while the module is paging the network. When the serial interface is active, data can be exchanged between the application and the module. The module will not return to low power mode until the serial interface transmission is completed and all the data is processed. Only when the serial interface transfer is completed and the data is processed, The module will return to low power mode automatically, according to the ATS24 settings. FIGURE 12 Serial Interface data Motorola General Business Use Page 14 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 ATS24 Module Sleep Idle CTS_N Disabled Enabled TXD_N or RXD_N 2.4.3.2 Permanent termination of Low Power Mode The module low power mode is enabled and disabled by the ATS24 command. To permanently terminate the low power mode, the ATS24 = 0 command must be used. Setting ATS24 =

0 disables the currently active low power mode and switches the module to Idle mode. The module will not return to low power mode until an ATS24 > 0 commands is set again. Motorola General Business Use Page 15 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.5 Real Time Clock The module incorporates a Real Time Clock (RTC) mechanism that performs many internal functions, one of which is keeping time and alarm operation. The RTC subsystem is embedded in the module and operates in all the different operating modes (Off, Idle, Sleep), as long as power is supplied above the minimum operating level. The module time and date can be set by the following methods:

Automatically retrieved from the network. In case the module is operated in a network that supports automatic time zone updating, it will update the RTC with the local time and date upon connection to the network. The RTC will continue to keep the time from that point. Using the AT+CCLK command. Setting the time and date manually by this AT commands overrides the automatic network update. Once the time and date are manually updated, the RTC timer will keep the time and date synchronized regardless of the module operating state. When the power supply is disconnected from the module, the RTC timer will reset and the current time and date will be lost. On the next module power-up the time and date will need to be set again automatically or manually Motorola General Business Use Page 16 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.6 Serial Interfaces The module includes 3 completely independent serial communications interfaces, which may be used by the application for several purposes. TABLE 5 Serial Interfaces signals Pin (s) Signal Name Description 9 11 13 15 17 19 21 23 29 31 33 35 10 12 14 RTS_N RXD_N DSR_N CTS_N DCD_N DTR_N TXD_N RI_N RXD2 TXD2 RTS2 CTS2 Primary UART Ready -To - Send signal Primary UART Receive Data signal Primary UART Data - Set - Ready signal Primary UART Clear -To - Send signal Primary UART Carrier Detect signal Primary UART Data - Terminal - Ready signal Primary UART Transmit Data signal Primary UART Ring Indicator signal Secondary UART Receive Data signal Secondary UART Transmit Data signal Secondary UART Ready -To - Send signal Secondary UART Clear -To - Send signal USB_VBUS USB bus power USB_DP USB_DN USB bus differential serial data (positive) USB bus differential serial data (negetive) 2.6.1 Primary UART (UART1) The modules primary UART is a standard 8-signal bus. The primary UART is used for all the communications with the module AT commands interface, Data Calls and CSD data, programming and software upgrades. The UART signals are active low CMOS level signals. For standard RS232 communications with a PC, an external transceiver is required. The module is defined as a DCE device, and the user application is defined as the DTE device. These definitions apply for the UART signals naming conventions, and the direction of data flow, as described in the following figure. Motorola General Business Use Page 17 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Module DCE DTE UART FIGURE 13 UART1 interface signals TXD_N RXD_N RTS_N CTS_N DTR_N DSR_N DCD_N RI_N TXD RXD RTS CTS DTR DSR DCD RI 21 11 9 15 19 13 17 23 The primary UART supports the baud rates 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps. Auto baud rate detection is not supported. Default baud rate is 1115200 bos. All flow control handshakes are supported: hardware, software, or none. Parity bit and Stop bit definitions are also supported. The UART default port configuration is 8 data bits, 1 stop bit and no parity, with hardware flow control and auto baud rate detect enabled. 2.6.2 Secondary UART (UART2) The modules secondary UART is a standard 4-signal bus, which only provides data and flow control signals. The secondary UART is used for all the communications with the module AT commands interface, Data Calls and CSD data, programming and software upgrades. The UART signals are active low CMOS level signals. For standard RS232 communications with a PC, an external transceiver is required. The module is defined as a DCE device, and the user application is defined as the DTE device. These definitions apply for the UART signals naming conventions, and the direction of data flow, as described in the following figure. FIGURE 14 UART2 interface signals The secondary UART supports the baud rates 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps. Auto baud rate detection is not supported. Default baud rate is 115200 bps. All flow control handshakes are supported: hardware, software, or none. Parity bit and Stop bit definitions are also supported Motorola General Business Use Page 18 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.6.3 USB Interface The module incorporates a standard Universal Serial Bus (USB) interface. The USB electrical interface and protocol conform to the USB 2.0 full-speed specifications. The module is defined as a USB device on the USB bus and does not support hub or host functionality. USB may be used for standard communications with the module, as done through the UART interfaces. When USB is active, the modules low power mode cannot be operated. FIGURE 15 USB interface signals USB HOST VBUS D+

D-

10 12 14 VBUS DP DN Module USB DEVICE Motorola General Business Use Page 19 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.7 Removable-User Identify Module (R-UIM) Interface The module incorporates a standard Removable-User Identify Module (R-UIM) interface. Pin TABLE 6 R-UIM interface signals Description 48 44 52 46 50 Signal Name UIM_PWR Card supply voltage UIM_RESET UIM_DATA UIM_CLK UIM_CR_DET Card reset Data I/O Card clock Card detect Motorola General Business Use Page 20 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.8 Audio Interface The module supports the following audio devices:

Two single-ended biased analog microphone inputs for use in a variety of modes.

Two differential mono analog speaker outputs for use in a variety of modes.

A digital serial interface using PCM coding. TABLE 7 Audio Interface signals Pin (s) Signal Name HDST_INT_N HDST_MIC AGND MIC ALRT_N ALRT_P SPKR_N SPKR_P Description Headset detection signal Headset microphone signal / Differential Microphone

(positive) Audio Ground Handset microphone signal / Differential Microphone

(negative) Differential Loud speaker (negative) Differential Loud speaker (positive) Handset differential speaker (negative) Handset differential speaker (positive) PCM_DIN Digital audio receive PCM_DOUT Digital audio transmit PCM_CLK Digital audio clock PCM_FS Digital audio frame sync. 55 57 59 61 63 65 67 69 18 20 22 24 2.8.1 Handset Microphone Port The handset microphone port is the modules power-up default active audio input for voice calls. It is located on pin 61 at the interface connector, named MIC. It is designed as a single-ended input and should be referenced to the module analog ground. The microphone input includes all the necessary circuitry to support a direct connection to an external microphone device. It incorporates an internal bias voltage of 1.8V through a 2.2K resistor, and has an impedance of 1K. Motorola General Business Use Page 21 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Min 0 1.7 Typ Max Units 1 1.8 1.58 31 1.9 1 VPP dB K V mA TABLE 8 Microphone Port Specifications Parameter Conditions Input Voltage No load Gain Programmable in 1 dB steps AC Input Impedance Bias voltage RBIAS = 2 K IBIAS 1 mA Bias Current 2.8.2 Headset Microphone Port The headset microphone port is designed for use with, but not limited to, a headset audio device. It is located at pin 57 on the interface connector, named HDST_MIC. It is designed as a single-ended input and should be referenced to the module analog ground. The microphone input includes all the necessary circuitry to support a direct connection to a headset microphone device. It incorporates an internal bias voltage of 1.8V through a 2.2K resistor, and has an impedance of 1K. Parameter TABLE 9 Headset Microphone Port Specifications Conditions Units Max Typ Min Input Voltage No load Gain Programmable in 1 dB steps AC Input Impedance Bias voltage RBIAS = 2 K IBIAS 1 mA Bias Current 0 1 1.58 31 1.7 1.8 1.9 1 VPP dB K V mA Motorola General Business Use Page 22 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.8.3 Speaker Port The analog speaker port is the modules power-up default active output for voice calls and DTMF tones. It is located at pins 67 and 69 on the interface connector, named SPKR_N and SPKR_P respectively. It is designed as a differential output with 32 impedance, but may also be used as a single-ended output referenced to the modules analog ground. The speaker output is used for both the handset and the headset audio paths. TABLE 10 Speaker Port Specifications Parameter Conditions Output Voltage Gain No load Programmable in 3 dB steps Handset mode Headset mode

(See table 17) AC Output Impedance DC voltage 32 load Speech, f > 4 KHz THD Isolation Min

-35.8

-28.8 60 Typ Max Units 32 1 2 VPP

-14.8

-7.8 0.15 dB V

dB Motorola General Business Use Page 23 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.8.4 Headset Detection The module operates by default in the basic audio mode with the handset audio path, for DTMF tones and speech, and the alert loudspeaker device, for rings and alert tones, active. The headset path is an alternate audio path in basic mode. It is designed for, but not limited to, a personal hands-free audio device, a headset, using the headset microphone input device and the speaker output device. When this path is selected all the audio sounds are passed through to the headset path. The HDST_INT_N signal is used to switch between handset and headset audio paths in basic audio mode. This signal is set high by default at power up. Asserting the HDST_INT_N signal low enables the headset audio path and disables the handset and alert paths. Setting this signal high will disable the headset path and enable the handset and alert audio paths. The module supports dynamic switching between the handset and headset audio paths, during operation and call handling. The HDST_INT_N signal does not operate in advanced audio mode. This signals functionality is overridden by the AT+MAPATH command settings. 2.8.5 Alert Loudspeaker Port The alert loudspeaker is the modules default power-up ringer. It is used for, but not limited to, sounding the modules alerts, melodies, and rings. It is located at pins 63 and 65 on the interface connector, named ALRT_N and ALRT_P respectively. It is designed with an internal amplifier supplied directly from VCC, which supplies up to 0.5W to the audio device. It may also be used as a single-ended output referenced to the modules analog ground. TABLE 11 Alert Port Specifications Parameter Conditions Output Voltage Gain No load Programmable in 5dB steps AC Output Impedance DC voltage THD 8 load Isolation Min

-16 45 Typ Max Units 8 VCC/2 2.8 12 2 VPP dB V

dB Motorola General Business Use Page 24 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 2.8.6 Digital Audio Interface C24 Hardware Interface Manual Version 0.3 The modules digital audio interface is a serial Pulse Code Modulation (PCM) bus, which uses linear 2s compliment coding. The module is the PCM bus master, supplying the clock and sync signals to the application. The modules digital interface is a 4 signal PCM bus, which includes a bit clock output signal for the bus timing, a frame sync output signal for audio sampling timing, and serial data input and output signals. The digital audio interface supports Voiceband audio Intended for speech during voice calls and for mono rings and alerts. The PCM bus configuration is defined by the audio data format that is sounded through the digital audio path, as described in the following table. Audio Mode TABLE 12 Digital Audio modes AT+CRTT tones Bit Clock Voice 2048 kHz 2048 kHz 8 KHz Mono tones This digital voice audio format is used for speech during voice calls and for mono rings and alerts. The PCM bus signals configuration for voiceband audio is:

Frame-Sync Sampling 8 KHz PCM_CLK 2048 KHz serial clock PCM_FS 8 KHz bit-wide frame-sync PCM_DOUT 13-bit linear audio data output PCM_DIN 13-bit linear audio data input The analog audio is sampled at an 8 KHz rate and converted to linear 16-bit serial PCM audio data. The serial data is transferred on the PCM bus in 16-bit word format,. The 16-bit serial data is transferred in both directions after each sync signals falling edge. The sync signal pulse duration is one clock period, after which the serial data is transferred in both directions for 16 consecutive clock periods. Following the 16-bit data transfer, the serial input and output data signals inactivate until the next sync pulse, which occurs every 125 uS (8 KHz). It is recommended the serial data signals will be High-Z during the inactive period. The bus clock and sync output signals remain active all the time. FIGURE 22 Voiceband mode PCM bus coding format PCM_FS PCM_CLK PCM_DOUT PCM_DIN Motorola General Business Use Page 25 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.8.7 Audio Operating Modes The modules audio interface includes 2 modes of operation. Each operating mode defines the audio input and output devices to be used for each audio sound type and their programmable settings. 2.8.7.1 Basic Mode Basic audio mode is the modules default power-up audio configuration. Several audio paths are available in this mode, and their settings can be programmed through the AT command set. The following table describes the available audio paths in Basic mode. Audio Path TABLE 13 Basic mode audio paths Output Signal Input Signal Description Handset MIC Headset HDST_MIC SPKR_N, SPKR_P SPKR_N, SPKR_P Default audio path for speech and DTMF tones. Alternate path for headset device. Enable by setting HDST_INT_N interface signal low. Alert ALRT_N, ALRT_P Default alert and ringer loudspeaker output device. Digital PCM_DIN PCM_DOUT Enable digital path by AT+MADIGITAL=1 2.8.7.2 Advanced Mode An expanded AT command set enables to define a specific audio path and setting, which are not part of the default configuration, for each type of audio sound (speech, DTMF tones, rings and alerts). The following table describes the advanced mode audio programming features. These features are only a part of the complete advanced audio AT command set. Motorola General Business Use Page 26 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 TABLE 14 Advanced mode commands Description Sets the input device for voice, and the output devices for voice, DTMF tones, rings and alerts. Enables and disables the speech processing algorithms Echo suppression, noise suppression and sidetone. Sets the gain (amplification) level of the selected analog output device. Sets the gain (amplification) level of the selected analog input device. Switches between analog and digital audio paths. Command AT+MAPATH AT+MAFEAT AT+MAVOL AT+MMICG AT+MADIGITAL 2.8.8 Audio Programming Interface The module incorporates an audio programming interface, through AT commands, which controls the following audio features:

Audio Path Defines the input and output devices for speech, DTMF tones, rings and alerts.

Audio Gain Defines the amplification (gain) level for input and output audio devices.

Audio Algorithm Defines the speech processing features for voice calls. 2.8.8.1 Audio Algorithms The modules audio interface support speech processing algorithms for echo suppression, noise suppression and side-tone feedback Enabling or disabling the algorithms can be configured separately for each audio path and operating mode through the AT command interface. The module supports the following speech coding algorithms:

Motorola General Business Use Page 27 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 TABLE 15 Speech processing features Feature Echo Suppression Noise Suppression AT command Basic Advancd Default Setting Description ATS96 AT+MAFEAT Disabled Controls the echo and noise suppression. Sidetone ATS94 AT+MAFEAT Enabled Controls the sidetone. 2.8.8.2 Gain Control The amplification (gain) level for each input and output device can be configured through AT commands. Both basic and advanced audio modes provide AT commands to set the desired gain levels for each audio path and audio sound type. TABLE 16 Gain Control Features Gain Command Basic Advanced Default Gain AT+MMICG AT+MMICG Device Microphone Headset Microphone Speaker AT+CLVL Alert Speaker AT+CRSL AT+MAVOL Description Sets input speech gain level. Sets input speech gain level. Sets voice and DTMF gain. Sets rings and alerts gain. 3 3 4 4 The gain levels for the input and output devices, which correspond to the values set by the AT commands, are described in the following tables. Motorola General Business Use Page 28 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 TABLE 17 Rx port Gains C24 Hardware Interface Manual Version 0.3 AT Command Value 0 1 2 3 4 5 6 7 Handset Vs. 0dBm0 Headset Vs. 0dBm0 0dBm0 gain level

(dB)

-35.8

-32.9

-29.8

-27

-23.8

-20.8

-17.8

-14.8 0dBm0 output level

(mVRMS) 12 17.5 25 34.5 50 70 100 140 0dBm0 gain level

(dB)

-28.6

-25.7

-22.8

-19.8

-16.8

-13.8

-10.7

-7.7 0dBm0 output level

(mVRMS) 29 40 55.9 79.4 111.5 158 226 316.8 TABLE 18 Microphone and Headset-Microphone port Gains AT Command Value 0dBm0 Input Level

(mVRMS) Maximum Input Level

(mVRMS) 0 3 16 31 87 63 15 4 350 250 55 11 Motorola General Business Use Page 29 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.8.8.3 Analog Ground The modules interface incorporates a dedicated analog ground contact, AGND pin 61, which is internally connected to the modules ground. The AGND signal is intended to provide a separate ground connection for the applications external audio devices and circuits. This signal provides an isolated ground connection directly from the module, which is separated from the noisy digital ground of the customer application. 2.9 A/D Interface The module includes 4 Analog to Digital Converter (ADC) signals with 8-bit resolution, for environmental and electrical measurements. The A/D signals operation and reporting mechanism is defined by the AT+MMAD command. The following section describes A/D interface TABLE 19 A/D Interface signals Pin (s) Signal Name Description

37 43 47 VCC ADC1 ADC2 ADC3 Power supply A/D General Purpose A/D General Purpose A/D General Purpose A/D / Battery Temperature A/D 2.9.1 Power Supply A/D The main power supply (VCC) is sampled internally by the module through a dedicated A/D port, which is not accessible on the interface connector. TABLE 20 Supply A/D Specifications Parameter Sampling Range Conditions Operating range Resolution Min 3.0 Typ Max Units 4.4 10 V mV 2.9.2 Battery Temperature A/D The module incorporates a dedicated A/D port for battery thermistor measurements. This feature is implemented only in the charger model version. TABLE 21 Temperature A/D Specifications Motorola General Business Use Page 30 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 Min

-30 Typ Max Units 1 85 5 C

C Conditions Operating range Parameter Temperature Range Tolerance Resolution 2.9.3 General Purpose A/D The module provides 3 additional general purpose A/D (GPAD) signals for customer application use. Each A/D signal can monitor a separate external voltage and report its measured level independently to the application, through the AT command interface. The A/D Signals are available at the connector in the following pins: 37, 43 and 47. The GPAD signals can sense a DC voltage level of 0 2.3 V, which is converted internally to a 10-bit digital value. Parameter TABLE 22 GPAD Specifications Conditions Units Max Typ Min Input Voltage Sampling Range Resolution 0 0.05 2.9 2.5 10 V V mV Motorola General Business Use Page 31 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.10 Control and Indicators Interface The module incorporates several interface signals for controlling and monitoring its operation. The following section describes these signals and their operation. TABLE 23 Controls and Indicators Description Connector Signal Name Pin 25 27 26 41 49 39 RESET_N System reset output indicator. When high, the module is operating. VREF 2.8V regulated output. Supplies external circuits up to 150mA. WKUPO_N Host application wake-up signal indicator. ANT_DET Antenna physical connection detect indicator. CDMA Network status indicator. TXEN_N Transmission burst indication. General purpose IO signals for customer use. 28, 30, 32, 34, 36, 38, GPIO 1-8 40, 42 2.10.1 Reset The RESET_N output signal indicates the modules operating status. This signal is set high after power up, when the module is operating. It is set low when the module is powered off. When the RESET_N signal is low, the modules application interface signals are disabled and do not represent any valid data or state. Once the unit is turned-on, this signal must be disabled (high) for all SW modes (including modes as re-programming, sleep etc.) 2.10.2 VREF Reference Regulator The module incorporates a regulated voltage output, VREF. The regulator provides a 2.8V output for use by the customer application. This regulator can source up to 150 mA of current to power any external digital circuits. TABLE 24 VREF Specifications Parameter Conditions Min Typ Max Units Motorola General Business Use Page 32 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 Parameter Conditions VOUT IOUT Load regulation Line regulation IOUT 150 mA PSRR 20 Hz 20 KHz C24 Hardware Interface Manual Version 0.3 Max

+2%

150 Units V mA 0.65 mV/mA 45 5.6 mV dB Min

-2%

Typ 2.8 The VREF regulator incorporates 3 operating modes that are controlled by the AT+MVREF command. These modes define the regulator operating state relative to the module's operating mode. The following figure sows the VREF power-up timing. OFF Mode In this mode the VREF regulator is disabled and its output drops to 0V, regardless of the module's operating state. Standby Mode The Standby operating mode is the default mode when module powers on. In this mode VREF follows the module's operating state. When the module is in low power mode, Sleep mode, the VREF regulator is also in a low power state. In this state the VREF regulated output is limited to providing only 1mA of current maximum, while maintaining the 2.8V output level. When module is in Idle mode, or wakes up temporarily from low power mode, the VREF regulator returns to full operation, supplying up to 150 mA. Active Mode In this mode the VREF regulator is always fully active while module is operating, regardless of the module operating mode. 2.10.3 Wake-Up Out The wakeup-out (WKUPO_N) signal is an active low output, which is designed to support a low power mode feature in the host application. This signal is used by the module to indicate that it requires to communicate with the host application through the serial interface, due to an incoming call or data, or an unsolicited event. The wakeup out mechanism, using the WKUPO_N signal, is controlled by 2 AT commands:

ATS102 - Defines the delay time in milliseconds that the module will wait, after asserting the WKUPO_N signal low, before sending data on the serial interface. This delay is required to allow the application enough time to reactivate from low power mode and switch to normal Motorola General Business Use Page 33 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 mode. If ATS102=0, which is the default value, the WKUPO_N signal and mechanism is disabled. In case the serial interface incorporates hardware flow control signals, the data will be sent according to their state, after the ATS102 delay time has expired. ATS100 - Defines the application minimal wakeup duration, in Seconds, for a single wakeup event. This time definition is required to avoid frequent unnecessary wakeup events and consequent ATS102 delays. The application may return to low power mode after the serial interface has been inactive for the duration set by ATS100. This duration is measured from the last data sent or received on the serial interface. The following guidelines apply to the wakeup-out mechanism:

The module will set the WKUPO_N signal low to indicate that in has data to send through the serial interface. The module will start sending the data to the application after the delay defined by ATS102. The WKUPO_N signal will remain low while data is being sent to the host application. The host application should keep its serial interface active, and not switch to low power mode, while the WKUPO_N signal is low. The module will set the WKUPO_N signal high when it has completed sending the data. The application serial interface must stay active, and not switch to low power mode, for the duration set by ATS100, after WKUPO_N is set high. The module will not set the WKUPO_N signal low if it needs to send additional data during the ATS100 delay time. The application may switch to low power mode after the WKUPO_N signal is set high and the serial interface has been inactive for the duration set by ATS100. FIGURE 25 WKUPO_N operation WKUPO_N Application Sleep Idle RXD_N ATS102 ATS100 2.10.4 Antenna Detection The module incorporates an internal antenna detection circuit, which senses the physical connection and removal of an antenna or antenna circuit on the modules antenna connector. The antenna detection state is reported to the application through the ANT_DET output signal, and may also be queried by the ATS97 command. The detection circuit senses DC resistance to ground on the modules antenna connector. A DC resistance below 100K ( 5%) is defined as a valid antenna connection, and the ANT_DET output signal is set high. A DC resistance above 100K ( 5%) is defined as an antenna disconnection, and the ANT_DET output is set low. Motorola General Business Use Page 34 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.10.5 CDMA NW Detection The CDMA output signal indicates the network CDMA connection status. When module is connected to a CDMA network, this signal is enabled. When module is not connected to the module network this signal is disabled. 2.10.6 Transmission Indicator The TXEN_N output signal indicates when the module is transmitting over the CDMA network. This signal follows the modules transmit bursts. This signal is set low during transmission, and set high when no transmission is in progress. 2.10.7 General Purpose I/O The module incorporates 8 general purpose IO signals for the user application. Each GPIO signal may be configured and controlled by AT command. These signals may be used to control or set external application circuits, or to receive indications from the external application. Each GPIO shall have internal pull-up resistor of 6K ( 5%

Motorola General Business Use Page 35 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1 C24 Hardware Interface Manual Version 0.3 2.11 Antenna Interface The modules antenna connector is the RF interface to the network. The antenna interface is terminated by an MMCX connector type, which is 50 impedance matched at the relevant frequencies. The antenna or antenna application must be installed properly to achieve best performance. Parameter TABLE 25 Antenna Interface Specifications Specifications Conditions 1900 MHz 800 MHz 1900 MHz 800 MHz

-106dBm

-106dBm Max Average Power Max Peak Power 25dBm 25dBm 30dBm 30dBm Sensitivity RF output power Gain Impedance VSWR 0 dBi (unity) gain or greater 50 Less than 2.5:1 Motorola General Business Use Page 36 of 36 Applicant: Motorola, INCFCC ID: IHDP56JE1