A7672X/A7670X Series Hardware Design Table 16: Amphenol USIM socket pin description Pin Signal Description USIM_VDD USIM Card Power supply. C1 C2 C3 C5 C6 C7 USIM_RST USIM Card Reset. USIM_CLK USIM Card Clock. GND VPP Connect to GND. NC USIM_DATA USIM Card data I/O. 3.6 Analog audio interface A7672X/7670X modules integrate audio codec and audio front end, provide 1 channel of analog audio MIC input interface and 1 channel of analog audio SPK output interface, customers can connect to the external phone handle for voice calls. ADC: 90dB SNR@20~20kHz DAC: 95dB SNR@20~20kHz
(Class-AB): THD<-85dB@32-ohm Table 17: MIC input ADC parameter list Parameter Clock frequency MIN
Table 18: Analog audio Parameter Type 6.144 MAX
Unit MHz Parameter DRType. THD+NType. MAX Power DAC RL=10K 101dBA Class-AB 100dBA Mono,32 Difference
-96dB(@vout
-2dBv)
-90dB(0.00316%)
(@20mW output) 1.59Vp 37mW 3.6.1 Analog audio reference design The analog audio recommendation circuit is as follows:
www.simcom.com 39/76 A7672X/A7670X Series Hardware Design Figure 24: Analog audio interface reference circuit 3.7 Matrix keyboard interface A7672X/7670X provides a 4*4 matrix keyboard interface. Table 19: matrix keyboard PIN description PIN Name MK_IN2 MK_IN3 MK_IN5 MK_IN6 MK_OUT2 MK_OUT3 MK_OUT5 MK_OUT6 47 20 68 36 44 21 67 35 DI DI DI DI DO DO DO DO The matrix keyboard interface recommendation circuit is as follows:
PIN NO. I/O Description Note Matrix keyboard input If unused, keep it open. Matrix keyboard output If unused, keep it open. www.simcom.com 40/76 A7672X/A7670X Series Hardware Design Figure 25: Matrix keyboard interface reference circuit 3.8 GPIO Interface A7672X/A7670X module provides multiple GPIOs. Table 20: Standard GPIO Resources of A7672X/A7670X Pin No. Pin name AT command operation GPIO number Pin typ. Power domain Default function 19 26 48 53 GPIO1 GPIO2 GPIO3 GPIO4 GPIO1 GPIO2 GPIO3 GPIO4 IO IO IO IO 1.8V 1.8V 1.8V 1.8V PU PD PD PU Pad Edge wakeup Yes Yes No Yes 3.9 I2C Bus The module provides two sets of I2C interfaces, support standard speed clock frequency 100Kbps, support high speed clock frequency 400Kbps, its operation voltage is 1.8V. www.simcom.com 41/76 A7672X/A7670X Series Hardware Design Figure 26: I2C reference circuit NOTE SCL and SDA have no pull-up resistor inside, external resistor is needed and the pulled power source must be VDD_1V8 output from the module. 3.10 Network status The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the following figure. Figure 27: NETLIGHT reference circuit www.simcom.com 42/76 A7672X/A7670X Series Hardware Design NOTE The value of the resistor named R depends on the LED characteristic. The NETLIGHT signal is used to control the LED lights that indicate the status of the network. The working status of this pin is shown in the table below. Table 21: 2G mode NETLIGHT pin status NETLIGHT pin status Module status Always On Searching Network 200ms ON, 200ms OFF Data Transmit 800ms ON, 800ms OFF Registered network OFF Power off / Sleep Table 22: LTE mode NETLIGHT pin status NETLIGHT pin status Module status Always On Searching Network 200ms ON, 200ms OFF Data Transmit/Registered OFF Power off / Sleep 3.11 GNSS interface A7672X/A7670X support GNSS function interface. GNSS provides 2 power supply input interfaces, 1 GNSS power enable control switch, 1 UART interface and 1 pulse synchronous clock signal interface, which are described in detail as follows. Table 23: GNSS interface description PIN Name I/O Description Note PIN NO GNSS_VBKP 116 PI GNSS backup power input 1V8_GNSS 97 PI GNSS VcoreVDDIO input GNSS_PWRCTL 98 DI GNSS Vcore VDDIO power enable control Power supply range 1.4V~3.6V, IVBKP=1mA (Typical, GNSS_VBKP=1.8V) The supply voltage shall not be less than 1.8V, and routing width should more than 0.5mm. Active high Solution 1Connect to GPIO recommend use MK_IN_3(PIN20) Solution 2Connect to MCU GPIO www.simcom.com 43/76 GNSS_RXD 96 DI GNSS UART RX GPS_TXD 95 DO GNSS UART TX A7672X/A7670X Series Hardware Design 1.8V power domain Solution 1Use 1K resistor to connect UART3_TXDPIN50 of the module in series to MCU Solution2:Connect UART_TX 1.8V power domain Solution 1Use 1K resistor to connect UART3_RXDPIN49 of the module in series Solution2 Connect to MCU UART_RX 1PPS 100 DO If unused, keep it open. pulse GNSS clock signal synchronous GNSS recommended reference design solution 1:
A7672X/A7670X module itself provides power, power enable and UART transmission to GNSS, the recommended reference design as follow:
Figure 28: GNSS reference designNon-standalone GNSS solution GNSS recommended reference design solution 2:
The external MCU provides power, power enable and UART transmission to GNSS, this solution is used for scenarios where GNSS can work standalone without the module powering up. The recommended reference design as follow:
www.simcom.com 44/76 A7672X/A7670X Series Hardware Design Figure 29: GNSS reference designstandalone GNSS solution NOTE 1. 2. Please series in 10K resistors for serial communication lines with non-standalone GNSS solution to prevent leakage current to the serial ports of GNSS chip. The standalone GNSS reference design is only applicable to 1.8V power domain MCU. If the MCU is not 1.8V power domain, a level shift circuit should be added. 3. The Vcore power for GNSS 1V8_GNSS has higher requirements for power supply, PCB routing should as short as possible, and the routing width is required to be at least 0.5mm 4. In some condition, it may be necessary to send dynamic loading code to GNSS chip through serial port. If having dynamic loading requirement, it is recommended to use reference design solution 1(non-standalone GNSS solution). Customers should let MCU realize the dynamic loading process by yourself if used reference design solution 2(standalone GNSS solution). 5. GNSS_VBKP power supply input is a necessary condition for hardware hot start, which can ensure the performance index of GNSS hot start to reach the optimal state, but when 1.8V input, the typical current consumption value is 1mA; Customers can choose the software AP-Flash hot start scheme, GNSS_VBKP can remain suspended; Compared with GNSS_VBKP hardware hot boot, AP-Flash has lower performance indicators. The principle of the hot startup of AP-Flash software is that GNSS will download the located 6. the module before the module shutdown . GNSS will ephemeris data to the internal FLASH of download the relevant ephemeris data of the last location to achieve rapid positioning when it is powered on next time. Detailed usage method reference document [1]. www.simcom.com 45/76 A7672X/A7670X Series Hardware Design 3.12 SPI LCD interface A7672X/A7670X module provides a set of SPI LCD interface, which only supports LCD module of 1 data line. The LCD interface of the module does not have specified LCD_TE signal pin. If necessary, you can choose GPIO to simulate the use of LCD_TE signal. It is recommended to use module pin 44 (MK_OUT_2) as the LCD_TE signal. It is recommended to reserve decoupling capacitor on the power supply for LCD, and reserve 0 resistor in series for debugging. At the same time, 0 in series is reserved on the data line to facilitate the adjustment of signal quality and prevent signal reflection, overshoot. Table 24: LCD interface description PIN NO I/O DO 101 PIN Name LCD_BL_PWM Description LCD backlight PWM signal Note LCD_SPI_CLK LCD_SPI_TXD LCD_SPI_RXD LCD_SPI_CS LCD_RST LCD_DCX 102 103 104 105 106 107 DO SPI clock DO, DI SPI data (Bidirectional) SPI data SPI CS LCD reset DI DO DO DO LCD command/parameter selection The recommended reference design of SPI LCD as follow:
www.simcom.com 46/76 A7672X/A7670X Series Hardware Design Figure 30: SPI LCD reference design 3.13 SPI camera interface A7672X/A7670X only supports SPI camera interface, supports up to 0.3MP pixel encoding, does not support video mode. Table 25: SPI camera interface description PIN Name CAM_I2C_SDA PIN NO I/O 117 DI, DO Description CAM I2C data Note CAM_I2C_SCL CAM_PWDN CAM_RST CAM_MCLK CAM_SPI_D0 CAM_SPI_D1 CAM_SPI_CLK 118 119 120 121 122 123 124 DO DO DO DO DI DI DO CAM I2C clock CAM power down CAM reset CAM main clock CAM SPI DATA 0 CAM SPI DATA 1 CAM SPI clock The recommended reference design of SPI camera as follow:
Figure 31: SPI camera reference design www.simcom.com 47/76 A7672X/A7670X Series Hardware Design 3.14 Bluetooth interface A7672X/A7670X module has integrated Bluetooth function inside, and only one BT antenna is left on the module interface. A7672X/A7670X Support BT5.0 protocol specification, compatible with BLE low power mode and traditional BT mode;
It only supports Bluetooth data transmission and does not support VoiceOverPCM & VoHCI. 3.15 Another interface 3.15.1 ADC Characteristics Resolution Input Range Characteristics Resolution Input Range NOTE Table 27: VBAT_ADC electronic characteristics A7672X/A7670X have 1 general ADC and 1 dedicated VBAT_ADC pins. VABT_ADC just available for digitizing battery voltage. These electronic specifications are shown in the following table. Table 26: General ADC electronic characteristics Min. Typ. Max. 0 0 9
9
1.8
1.8 Min. Typ. Max. Unit Bits V Unit Bits V AT+CADC can be used to read the voltage of the ADC pin, for more details, please refer to document
[1]. The recommended reference design of VBAT_ADC as follow:
www.simcom.com 48/76 A7672X/A7670X Series Hardware Design Figure 32: VBAT_ADC reference design 3.15.2 LDO A7672X/A7670X has 2 LDO outputsVDD_1V8 and VDD_2V8. VDD_1V8 is the module's system IO power supply, which can only provide a current capacity of 50mA. It cannot be used as a high current drive source. It can be used as a power supply for module 1V8_GNSS PIN97. VDD_2V8 is the module 2.8V LDO power output, which can only provide a current capacity of 50mA. It cannot be used as a high current drive source. It can be used as a power supply for LCD VCC_2V8. Table 28: VDD_1V8 Electrical characteristics Description Symbol VDD_1V8 IO Output voltage Output current Output voltage Output current VDD_2V8 IO NOTE Min. Typ. Max. Unit
1.8
2.8
50
50 V mA V mA Table 29: VDD_2V8 Electrical characteristics Description Symbol Min. Typ. Max. Unit VDD_1V8 is the system power supply. If the damage will affect the system startup, it is recommended that customers add TVS protection. The recommended model is ESD56051N. www.simcom.com 49/76 A7672X/A7670X Series Hardware Design 4 RF Specifications 4.1 GSM/LTE Specifications Table 30: Conducted transmission power Frequency EGSM900 DCS1800 EGSM900 (8-PSK) DCS1800 (8-PSK) LTE-FDD B1 LTE-FDD B2 LTE-FDD B3 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B8 LTE-FDD B20 LTE-FDD B28 LTE-FDD B66 LTE-TDD B34 LTE-TDD B38 LTE-TDD B39 LTE-TDD B40 LTE-TDD B41 Power 33dBm 2dB 30dBm 2dB 27dBm 3dB 26dBm +3/-4dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB 23dBm +/-2.7dB Min. 5dBm 5dB 0dBm 5dB 5dBm 5dB 0dBm 5dB
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm
<-40dBm Table 31: GSM Operating bands Frequency EGSM900 DCS1800 Receiving 925960MHz 18051880 MHz Transmission 880915 MHz 17101785 MHz Table 32: E-UTRA operating bands E-UTRA UL Freq. DL Freq. Duplex Mode www.simcom.com 50/76 1 2 3 4 5 7 8 20 28 66 34 38 39 40 41 1 2 3 4 5 7 8 20 28 66 34 38 39 A7672X/A7670X Series Hardware Design 1920~1980 MHz 1850~1910MHz 1710~1785 MHz 1710~1755MHz 824849 MHz 2500~2570MHz 880~915 MHz 832~862MHz 703~748MHz 1710~1780MHz 2010~2025MHz 2570~2620 MHz 1880~1920 MHz 2300~2400 MHz 2535~2655 MHz 2110~2170 MHz 1930~1990MHz 1805~1880 MHz 2110~2155MHZ 869894MHz 2620~2690MHz 925~960 MHz 791~821MHz 758~803MHz 2110~2200MHz 2010~2025MHz 2570~2620 MHz 1880~1920 MHz 2300~2400 MHz 2535~2655 MHz FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD TDD TDD TDD TDD TDD Table 33: Conducted receive sensitivity Frequency EGSM900 DCS1800 LTE FDD/TDD Receive sensitivity(Typical)
< -109dBm
< -108dBm See table 34. 3GPP 3GPP 3GPP Receive sensitivity(MAX) Table 34: Reference sensitivity (QPSK) E-UTRA Band 1.4 MHz 3MHz 10MHz 15 MHz 20 MHz 10 MHz 3GPP standard Actual Duplex Mode
-102.7
-101.7
-104.7
-103.2
-99.7
-98.7
-101.7
-100.2
-102.2
-99.2
-104.2
-100.2
-101.2
5MHz
-100
-98
-97
-100
-98
-98
-97
-97
-98.5
-99.5
-100
-100
-100
-97
-95
-94
-97
-95
-95
-94
-94
-95.5
-96.5
-97
-97
-97
-93.2
-92
-95.2
-93.2
-92.2
-95.2
-91.2
-93.7
-94.7
-95.2
-95.2
-95.2
-94
-92
-91
-94
-90
-91
-93.5
-94
-94
-98.5 TBD
-98.1 TBD
-98.6
-98
-98.1
-99 TBD TBD
-97.5
-98.6
-97.8 FDD FDD FDD FDD FDD FDD FDD FDD FDD FDD TDD TDD TDD www.simcom.com 51/76 40 41
-100
-98
-97
-95
-95.2
-93.2
-94
-92
-98.2
-98.6 TDD TDD A7672X/A7670X Series Hardware Design 4.2 GSM/LTE Antenna Requirements For better overall performance, it is recommended that the antenna design refer to the index requirements in the following table. Table 35: GSM/LTE antenna requirements Passive operating band Direction Gain Input impedance Efficiency Maximum input power VSWR Isolation PCB insertion loss(<1GHz) PCB insertion loss(1GHz~2.2GHz) PCB insertion loss(2.3GHz~2.7GHz) 4.3 GNSS Specifications Table 36: GNSS operating bands Type GPS GLONASS BeiDou Recommended standard See table 31 and table 32 omnidirectional
> -3dBi (Avg) 50 ohm
> 50 %
50W
< 2
>20dB
<0.5dB
<1dB
<1.5dB Frequecy 1575.421.023MHz 1597.5~1605.8MHz 1561.0982.046MHz Table 37: GNSS performance GNSS GPS BeiDou GLONASS www.simcom.com 52/76 A7672X/A7670X Series Hardware Design
-159.5dBm
-154dBm
-153dBm
-152dBm Tracking sensitivity
-160dBm Capture sensitivity
-154dBm Hot start TTFF Cold start TTFF Accuracy
<1s
<40s
<2m 4.4 GNSS Antenna Requirements Table 38: Recommended Antenna Characteristics (GNSS) Passive operating band Direction Input impedance Maximum input power VSWR Plan category Passive antenna gain Active antenna gain Active antenna noise figure Built-in antenna LNA gain Total antenna gain Coaxial insertion loss Recommended standard L1: 1559~1609MHZ Hemisphere, face to sky RHCP or Linear 50 ohm 50W
< 2 0dBi
-2dBi
< 1.5 20dB(Typ.)
< 18 dB
<1.5dB A7672X/A7670X Support BT5.0 protocol specification, compatible with BLE low power mode and traditional BT mode. 4.5 Bluetooth specifications Table 39: Bluetooth performance Frequency 2.402GHz~2.483GHz TX performance TX Power RX performance RX sensitivity www.simcom.com DH5 6 2DH5 TBD 3DH5 TBD dBm DH5 2DH5 3DH5 53/76 A7672X/A7670X Series Hardware Design
-93
-93
-87 dBm 4.6 Antenna Reference Design 4.6.1 Passive Antenna for GSM/LTE/GNSS/Bluetooth Figure 33: Passive antenna reference NOTE GNSS active antenna design is default solution. Strongly suggest to cut off GNSS active antenna supply by AT+CVAUXS=0, if customer design is passive antenna for GNSS. In above figure, the component R1/R2/C1/C2 is reserved for antenna matching, the value of components can only be got after the antenna tuning, usually provided by the antenna factory. Among them, R1 and R2 paste 0, C1 and C2 do not paste by default. The component D1 is a Bidirectional ESD Protection device, which is suggested to add to protection circuit, the recommended Part Numbers of the TVS are listed in the following table:
Table 40: TVS part number list Package 0201 0402 Type CE0201S05G01R PESD0402-03 Supplier SOCAY PRISEMI www.simcom.com 54/76 4.6.2 Active Antenna for GNSS A7672X/A7670X Series Hardware Design Default power supply value is controlled by AT+CVAUXV, default is 3V, which should meet the antenna requirement. For example, AT+CVAUXV=2800 sets power supply 2.8V. Figure 34: Active antenna reference 4.7 PCB layout Users should pay attention to the impedance design of PCB layout from the module ANT port to the antenna connector, and the length of the PCB trance should be within 20 mm, and far away from interference signals such as power & clock. It is recommended to reserve RF Switch Connector for conduction test. The reference model of RF Switch Connector is: ECT 818011998. Figure 35: Reference PCB layout www.simcom.com 55/76 A7672X/A7670X Series Hardware Design 5Electrical Specifications 5.1 Absolute maximum ratings Absolute maximum rating for digital and analog pins of A7672X/A7670X are listed in the following table, exceeding these limits may cause permanent damage to the module. Min. Typ. Max. Unit Table 41: Absolute maximum ratings Parameter Voltage on VBAT Voltage on USB_VBUS Voltage at digital pins
(GPIO, I2C, UART,PCM) Voltage at lO pins
(USIM) Voltage at PWRKEY, RESET
-0.5
-0.5
-0.3
-0.3
-0.3
-0.3 5.2 Operating conditions Table 42: Recommended operating ratings Parameter Voltage at VBAT Voltage at USB_VBUS Table 43: 1.8V Digital I/O characteristics*
Parameter Description VIH VIL VOH VOL IOH IOL IIH IIL High-level input voltage Low-level input voltage High-level output voltage Low-level output voltage 0
High-level output current (no pull down resistor) Low-level output current (no pull up resistor) Input high leakage current pull-down resistor)
(no Input low leakage current (no pull up resistor)
-10
4.8 5.4 2.0 2.0 3.9 4.8 4.2 5.4
0.2 13 13 10
V V V V V V V V V V V V mA mA uA uA Min. 3.4 3.0 Min. VCC*0.7
-0.3 VCC-0.2 Typ. 3.8 5.0 Typ. 1.8 0 Max. Unit Max. Unit VCC+0.2 VCC*0.3 www.simcom.com 56/76 A7672X/A7670X Series Hardware Design NOTE These parameters are for digital interface pins, such as GPIO, I2C, UART, and USB_BOOT. The operating temperature of A7672X/A7670X is listed in the following table. Min.
-10
-40
-45 Typ. Max. 25 25 25 50 85 90 Unit The performance will be reduced slightly from the 3GPP specifications if the temperature is outside the normal operating temperature range and still within the extreme operating temperature range. Table 44: Operating temperature Parameter Normal operation temperature Extended operation temperature*
Storage temperature NOTE 5.3 Operating Mode 5.3.1 Operating Mode Definition The table below summarizes the various operating modes of A7672X/A7670X product. Table 45: Operating mode Definition Mode GSM/ LTE Sleep GSM/LTE Idle GSM/ LTE Talk Normal operation Function In this case, the current consumption of module will be reduced to the minimal level and the module can still receive paging message and SMS. Software is active. Module is registered to the network, and the module is ready to communicate. Connection between two subscribers is in progress. In this case, the power consumption depends on network settings such as DTX off/on, FR/EFR/HR, hopping sequences, and antenna. GSM/LTE Standby Module is ready for data transmission, but no data is currently sent or received. In this case, power consumption depends on www.simcom.com 57/76 A7672X/A7670X Series Hardware Design network settings. There is data transmission in progress. In this case, power consumption is related to network settings (e.g., power control level); uplink/downlink data rates, etc. AT command AT+CFUN=0 AT+CSCLK=1 can be used to set the module to a minimum functionality mode without removing the power supply. In this mode, the RF part of the module will not work and the USIM card will not be accessible, but the serial port and USB port are still accessible. The power consumption in this mode is lower than normal mode. or pulling command AT+CFUN=4 AT the FLIGHTMODE pin can be used to set the module to flight mode without removing the power supply. In this mode, the RF part of the module will not work, but the serial port and USB port are still accessible. The power consumption in this mode is lower than normal mode. down Module will go into power off mode by sending the AT command AT+CPOF or pull down the PWRKEY pin, normally. In this mode the power management unit shuts down the power supply, and software is not active. The serial port and USB are is not accessible. GPRS/EDGE/LTE Data transmission Minimum functionality mode Flight mode Power off NOTE 5.3.2 Sleep mode In sleep mode, the current consumption of module will be reduced to the minimal level, and module can still receive paging message and SMS. Several hardware and software conditions must be satisfied together in order to let A7672X/A7670X enter into sleep mode:
USB condition Software condition UART condition Before designing, pay attention to how to realize sleeping/waking function and refer to Document [24]
for more details. www.simcom.com 58/76 A7672X/A7670X Series Hardware Design 5.3.3 Minimum functionality mode and Flight mode Minimum functionality mode ceases majority function of consumption. This mode is set by the AT command which provides a choice of the functionality levels. thus minimizing the power the module, AT+CFUN=0: Minimum functionality AT+CFUN=1: Full functionality (Default) AT+CFUN=4: Flight mode If A7672X/A7670X has been set to minimum functionality mode, the RF function and SIM card function will be closed. In this case, the serial port and USB are still accessible, but RF function and SIM card will be unavailable. If A7672X/A7670X has been set to flight mode, the RF function will be closed. In this case, the serial port and USB are still accessible, but RF function will be unavailable. When A7672X/A7670X is in minimum functionality or flight mode, it can return to full functionality by the AT command AT+CFUN=1. 5.4 Current Consumption The current consumption is listed in the table below. Table 46: Current consumption on VBAT Pins (VBAT=3.8V) GSM sleep/idle mode Current under CFUN=0, CSCLK=1 TBD GSM supply current
(GNSS offwithout USB connection) Sleep mode@BS_PA_MFRMS=2 Typical: TBD Idle mode@BS_PA_MFRMS=2 Typical: TBD LTE sleep/idle mode LTE supply current
(GNSS offwithout USB connection) Sleep mode@DRX=0.32STypical: TBD Idle mode @DRX=0.32STypical: TBD GSM Talk EGSM 900 DCS1800 GPRS EGSM900( 2 Rx,4 Tx ) DCS1800( 2 Rx,4 Tx ) EGSM900( 3Rx, 2 Tx ) DCS1800( 3Rx, 2 Tx ) EDGE EGSM900( 2 Rx,4 Tx ) DCS1800( 2 Rx,4 Tx ) EGSM900( 3Rx, 2 Tx ) DCS1800( 3Rx, 2 Tx )
@power level #5 Typical: 320 mA
@power level #5 Typical: 262 mA
@power level #5 Typical: 630mA
@power level #0Typical:395mA
@power level #5 Typical:370mA
@power level #0Typical:275mA
@power level #8Typical:460mA
@power level #2Typical:300mA
@power level #8Typical: 336mA
@power level #2Typical:208mA www.simcom.com 59/76 LTE Cat1 LTE-FDD B1 LTE-FDD B2 LTE-FDD B3 LTE-FDD B4 LTE-FDD B5 LTE-FDD B7 LTE-FDD B8 LTE-FDD B20 LTE-FDD B28 LTE-FDD B66 LTE-TDD B34 LTE-TDD B38 LTE-TDD B39 LTE-TDD B40 LTE-TDD B41 5.5 ESD Notes Part VBAT, GND Antenna port USB interface UART interface Other PADs NOTE A7672X/A7670X Series Hardware Design
@10MHz 23dBm Typical :600 mA
@10MHz 23dBm Typical :TBD
@10MHz 23dBm Typical :600 mA
@10MHz 23dBm Typical :TBD
@10MHz 23dBm Typical :580 mA
@10MHz 23dBm Typical :540mA
@10MHz 23dBm Typical :520mA
@10MHz 23dBm Typical :540mA
@10MHz 23dBm Typical :TBD
@10MHz 23dBm Typical :TBD
@10MHz 23dBm Typical :260mA
@10MHz 23dBm Typical :340 mA
@10MHz 23dBm Typical :260 mA
@10MHz 23dBm Typical :340mA
@10MHz 23dBm Typical :340mA A7672X/A7670X is sensitive to ESD in the process of storage, transporting, and assembling. WhenA7672X/A7670X is mounted on the users mother board, the ESD components should be placed beside the connectors which human body may touch, such as SIM card holder, audio jacks, switches, keys, etc. The following table shows the A7672X/A7670X ESD measurement performance without any external ESD component. Table 47: The ESD performance measurement table (Temperature: 25, Humidity: 45%.) Contact discharge Air discharge
+/-5K
+/-5K
+/-4K
+/-4K
+/-1K
+/-10K
+/-10K
+/-8K
+/-6K
+/-2K Test conditions: The module is on the SIMCom development board (the development board has the necessary ESD protection devices) www.simcom.com 60/76 A7672X/A7670X Series Hardware Design 6SMT Production Guide 6.1 Top and Bottom View of A7672X/A7670X Figure 36: Top and bottom view of A7672X Figure 37: Top and bottom view of A7670X www.simcom.com 61/76 A7672X/A7670X Series Hardware Design NOTE The above is the design effect diagram of the module for reference. The actual appearance is subject to the actual product. 6.2 Label Information Figure 38: Label information for A7672X www.simcom.com 62/76 A7672X/A7670X Series Hardware Design Figure 39: Label information for A7670X Table 48: The description of label information No. A B C D E Description Project name Part number Serial number IMEI number QR code 6.3 Typical SMT Reflow Profile SIMCom provides a typical soldering profile. Therefore, the soldering profile shown below is only a generic recommendation and should be adjusted to the specific application and manufacturing constraints. www.simcom.com 63/76 A7672X/A7670X Series Hardware Design NOTE 2 2a 3 4 5 6 5a Figure 40: The ramp-soak-spike reflow profile of A7672X/A7670X For more details about secondary SMT, please refer to the document [21]. 6.4 Moisture Sensitivity Level (MSL) A7672X/A7670X is qualified to Moisture Sensitivity Level (MSL) 3 in accordance with JEDEC J-STD-033. The following table shows the features of Moisture Sensitivity Level (MSL). After seal off, storage conditions must meet the following table. If the storage time was expired, module must be baking before SMT. Table 49: Moisture Sensitivity Level and Floor Life Moisture Sensitivity Level (MSL) 1 Floor Life (out of bag) at factory ambient30C/60% RH or as stated Unlimited at 30/85% RH 1 year at30/60% RH 4 weeks at 30/60% RH 168 hours at 30/60% RH 72 hours at 30/60% RH 48 hours at 30/60% RH 24 hours at 30/60% RH Mandatory bake before use. After bake, it must be reflowed within the time limit specified on the label. NOTE www.simcom.com 64/76 A7672X/A7670X Series Hardware Design IPC / JEDEC J-STD-033standard must be followed for production and storage. www.simcom.com 65/76 A7672X/A7670X Series Hardware Design 7Packaging A7672X/A7670X module support tray packaging. Figure 41: packaging diagram Module tray drawing Table 50: Tray size Length3mm 242.0 www.simcom.com Figure 42: Tray drawing Width3mm 161.0 Module number 20 66/76 Small carton drawing A7672X/A7670X Series Hardware Design Figure 43: Small carton drawing Table 51: Small Carton size Length10mm Width10mm Height10mm Module number 270 20*20=400 120 180 Big carton drawing Figure 44: Big carton drawing www.simcom.com 67/76 A7672X/A7670X Series Hardware Design Table 52: Big Carton size Length10mm Width10mm 380 280 Height10mm Module number 280 400*4=1600 www.simcom.com 68/76 A7672X/A7670X Series Hardware Design 8Appendix 8.1 Coding Schemes and Maximum Net Data Rates over Air Interface Table 53: Coding Schemes and Maximum Net Data Rates over Air Interface Multislotdefinition(GPRS/EDGE) Slot class DL slot number UL slot number Active slot number 1 2 3 4 5 6 7 8 9 10 11 12 1 2 2 3 2 3 3 4 3 4 4 1 1 2 1 2 2 3 1 2 2 3 GPRS coding scheme CS 1 = 9.05 kb/s / time slot CS 2 = 13.4 kb/s / time slot CS 3 = 15.6 kb/s / time slot CS 4 = 21.4 kb/s / time slot EDGE coding scheme MCS 1 = 8.8 kb/s/ time slot MCS 2 = 11.2 kb/s/ time slot MCS 3 = 14.8 kb/s/ time slot MCS 4 = 17.6 kb/s/ time slot MCS 5 = 22.4 kb/s/ time slot MCS 6 = 29.6 kb/s/ time slot MCS 7 = 44.8 kb/s/ time slot MCS 8 = 54.4 kb/s/ time slot MCS 9 = 59.2 kb/s/ time slot 4 4 Max data rata4 slots 36.2 kb/s 85.6 kb/s Max data rata4 slots 35.2 kb/s 53.6 kb/s 62.4 kb/s 44.8 kb/s 59.2 kb/s 70.4 kb/s 89.6 kb/s 118.4 kb/s 179.2 kb/s 217.6 kb/s 2 3 3 4 4 4 4 5 5 5 5 5 GMSK GMSK GMSK GMSK GMSK GMSK GMSK GMSK 8PSK 8PSK 8PSK 8PSK 8PSK Modulation type Modulation type LTE-FDD device category Modulation type 236.8 kb/s Max data ratepeak www.simcom.com 69/76 A7672X/A7670X Series Hardware Design
(Downlink) Category M1 LTE-FDD device category
(Uplink) Category M1 Max data ratepeak 1Mbps 375kbps QPSK/16QAM Modulation type QPSK/16QAM 8.2 Related Documents Table 54: Related Documents NO. Title A7600 Series AT Command Manual _V1.00.04 ITU-T Draft new recommendationV.25ter
[1]
[2]
[3]
[4]
[5]
[7]
[8]
GSM 07.07 GSM 07.10 GSM 07.05
[6]
GSM 11.14 GSM 11.11 GSM 03.38
[9]
GSM 11.10
[10]
3GPP TS 51.010-1
[11]
3GPP TS 34.124
[12]
3GPP TS 34.121
[13]
3GPP TS 34.123-1
[14]
3GPP TS 34.123-3
[15]
EN 301 908-02 V2.2.1
[16]
EN 301 489-24 V1.2.1 Description AT Command Manual Serial asynchronous automatic dialing and control Digital cellular telecommunications (Phase 2+); AT command set for GSM Mobile Equipment (ME) Support GSM 07.10 multiplexing protocol Digital cellular telecommunications (Phase 2+); Use of Data terminating Equipment Terminal Equipment Data Circuit
(DTE DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS) Digital cellular telecommunications system (Phase 2+);
Specification of the SIM Application Toolkit for the Subscriber Identity Module Mobile Equipment (SIM ME) interface telecommunications system (Phase 2+);
Digital cellular Specification of Identity Module Mobile the Subscriber Equipment (SIM ME) interface Digital cellular Alphabets and language-specific information telecommunications system (Phase 2) Digital cellular Mobile Station (MS) conformance specification Part 1:
Conformance specification Digital cellular Mobile Station (MS) conformance specification telecommunications system (Release 5);
telecommunications system (Phase 2+);
Electromagnetic Compatibility (EMC) for mobile terminals and ancillary equipment. Electromagnetic Compatibility (EMC) for mobile terminals and ancillary equipment. Technical Specification Group Radio Access Network;
Terminal conformance specification; Radio transmission and reception (FDD) User Equipment Abstract Test Suites. Electromagnetic compatibility and Radio spectrum Matters
(ERM); Base Stations (BS) and User Equipment (UE) for IMT-2000. Third Generation cellular networks; Part 2:
Harmonized EN for IMT-2000, CDMA Direct Spread
(UTRA FDD) (UE) covering essential requirements of article 3.2 of the R&TTE Directive Electromagnetic compatibility and Radio Spectrum Matters
(ERM); Electromagnetic Compatibility (EMC) standard for
(UE) conformance specification; Part 3:
www.simcom.com 70/76 A7672X/A7670X Series Hardware Design radio equipment and services; Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for Mobile and portable (UE) radio and ancillary equipment Safety of information technology equipment (2000) Digital cellular Mobile Station (MS) conformance specification Global Certification Forum - Certification Criteria Directive of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(RoHS) telecommunications system (Release 5);
Module secondary SMT Guidelines This document describes how to use UART interface of SIMCom modules. Antenna design guidelines for diversity receiver system Sleep Mode Application Note This document introduces UIM card detection and UIM hot swap.
[17]
[18]
[19]
[21]
[22]
[23]
[24]
[25]
IEC/EN60950-1(2001) 3GPP TS 51.010-1 GCF-CC V3.23.1
[20]
2002/95/EC Module secondary-SMT-UGD-V1.xx A7600Series_UART_Applicati on Note_V1.xx Antenna design guidelines for diversity receiver system A7600 Series_SleepMode_Applicatio n Note_V1.xx A7600 Series_UIM HOT SWAP_Application Note_V1.00 www.simcom.com 71/76 A7672X/A7670X Series Hardware Design 8.3 Terms and Abbreviations Table 55: Terms and Abbreviations Abbreviation Description Analog-to-Digital Converter Antenna Reference Point Bit Error Rate BeiDou Base Transceiver Station Coding Scheme Circuit Switched Data Clear to Send Digital-to-Analog Converter Digital Signal Processor Data Terminal Ready Discontinuous Transmission Downloadable Application Module Dynamic Power Optimization Enhanced Full Rate EGSM Enhanced GSM Data Terminal Equipment (typically computer, terminal, printer) Electromagnetic Compatibility Electrostatic Discharge European Telecommunication Standard Federal Communications Commission (U.S.) SIM fix dialing phonebook Frequency Division Multiple Access Full Rate Gaussian Minimum Shift Keying Global Navigation Satellite System General Packet Radio Service Global Positioning System Global Standard for Mobile Communications International Mobile Equipment Identity Half Rate Inter-Integrated Circuit Long Term Evolution Mobile Originated Mobile Terminated Mobile Station (GSM engine), also referred to as TE ADC ARP BER BD BTS CS CSD CTS DAC DSP DTE DTR DTX DAM DPO EFR EMC ESD ETS FCC FD FDMA FR GMSK GNSS GPRS GPS GSM HR I2C IMEI LTE MO MS MT www.simcom.com 72/76 A7672X/A7670X Series Hardware Design NMEA PAP PBCCH PCB PCS RF RMS RTC SIM SMS SMPS TDMA TE TX UART VSWR SM NC EDGE ZIF WCDMA VCTCXO SIM UMTS UART PSM FD LD MC ON RC SM NC National Marine Electronics Association Password Authentication Protocol Packet Switched Broadcast Control Channel Printed Circuit Board Personal Communication System, also referred to as GSM 1900 Radio Frequency Root Mean Square (value) Real Time Clock Subscriber Identification Module Short Message Service Switched-mode power supply Time Division Multiple Access Terminal Equipment, also referred to as DTE Transmit Direction Universal Asynchronous Receiver & Transmitter Voltage Standing Wave Ratio SIM phonebook Not connect Enhanced data rates for GSM evolution Zero intermediate frequency Wideband Code Division Multiple Access Universal subscriber identity module Universal mobile telecommunications system Universal asynchronous receiver transmitter Power saving mode SIM fix dialing phonebook Voltage control temperature-compensated crystal oscillator SIM last dialing phonebook (list of numbers most recently dialed) Mobile Equipment list of unanswered MT calls (missed calls) SIM (or ME) own numbers (MSISDNs) list Mobile Equipment list of received calls SIM phonebook Not connect www.simcom.com 73/76 8.4 Safety Caution Table 56: Safety Caution Marks A7672X/A7670X Series Hardware Design Requirements When in a hospital or other health care facility, observe the restrictions about the use of mobiles. Switch the cellular terminal or mobile off, medical equipment may be sensitive and not operate normally due to RF energy interference. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off. The operation of wireless appliances in an aircraft is forbidden to prevent these interference with communication systems. Forgetting to think much of instructions may impact the flight safety, or offend local legal action, or both. Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where blasting operations are in progress. Operation of any electrical equipment in potentially explosive atmospheres can constitute a safety hazard. Your cellular terminal or mobile receives and transmits radio frequency energy while is used close to TV sets, radios, switched on. RF interference can occur if computers or other electric equipment. Road safety comes first! Do not use a hand-held cellular terminal or mobile when driving a vehicle, unless it is securely mounted in a holder for hands free operation. Before making a call with a hand-held terminal or mobile, park the vehicle. GSM cellular terminals or mobiles operate over radio frequency signals and cellular networks and cannot be guaranteed to connect in all conditions, especially with a mobile fee or an invalid SIM card. While you are in this condition and need emergent help, please remember to use emergency calls. In order to make or receive calls, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength. Some networks do not allow for emergency call if certain network services or phone features are in use (e.g. lock functions, fixed dialing etc.). You may have to deactivate those features before you can make an emergency call. Also, some networks require that a valid SIM card be properly inserted in the cellular terminal or mobile. it www.simcom.com 74/76 A7672X/A7670X Series Hardware Design 9Notes 9.1List of applicable FCC rules The A7672X and A7670X module meet the requirements of FCC part 15C (15.247). They specifically establish the 20dB Occupied Bandwidth, Peak Output Power, Radiated Spurious Emission, Carrier Frequencies Separation, Restricted Band of Operation and Band Edge (Out of Band Emissions), Hopping Channel Number, Dwell Time, Pseudorandom Frequency and Hopping Sequence. 9.2 Summarize the specific operational use conditions The EUT support External R-SMA antenna for Bluetooth, the antenna gain is 3.39dBi, and the antenna cannot be replaced by other authorized antennas. 9.3 Limited module procedures The module is a single module. 9.4 RF exposure considerations This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. "This module is designed to comply with the FCC statement, A7672SA FCC ID is:
2AJYU-8BAE001 and A7670SA FCC ID is: 2AJYU-8BAE002". 9.5 Antennas The EUT support External R-SMA antenna for Bluetooth, the antenna gain is 3.39dBi, and the antenna cannot be replaced by other authorized antennas. www.simcom.com 75/76 A7672X/A7670X Series Hardware Design 9.6 Label and compliance information The host system using this module should have label
"Contains FCC ID: 2AJYU-8BAE001" or Contains FCC ID: 2AJYU-8BAE002. in a visible area indicated the following texts:
9.7 Information on test modes and additional testing requirements Dong Guan Gentech Instrument Electronic Co.,Ltd. can increase the utility of our modular transmitters by providing instructions that simulates or characterizes a connection by enabling a transmitter. 9.8 Additional testing, Part 15 Subpart B disclaimer The module comply with FCC Part 15 Subpart B. FCC Statement 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. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. 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 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. www.simcom.com 76/76