FCC ID: 2ACCRMB06 BT Module

FCC ID: 2ACCRMB06 IC: 22745-MB06 HVIN: EH-MB06 EH-MB06 Audio Module Data Sheet EH-20211215-DS Rev1.3 Feature Bluetooth v5.1 Bluetooth, Bluetooth low energy 120MHz Qualcomm KalimbaTMaudio DSPs

- Dual core application subsystem 32 MHz operation

Flexible QSPI flash programmable platform

- High-performance 24-bit stereo audio interface

- Digital and analog microphone interfaces

SBC, and AAC audio codecs support

Serial interfaces: UART, Bit Serializer

(I2C/SPI),USB 2.0 256K RAM,32M Flash

Application Subsystem 32-bit Firmware Processor:

- Dual core application subsystem 32 MHz operation

- Reserved for system use

- Runs Bluetooth upper stack, profiles, house-

keeping code 32-bit Developer Processor:Runs developer applications Both cores execute code from external flash memory using QSPI clocked at 32MHz

- On-chip caches per core allow for optimized

performance and power consumption

User Interface

- Send AT command over UART

- Firmware upgrade over USB

- PCM interface (I2S,SPDIF)

I2C interface(Master ) General I/O

13 general purpose I/Os 2 analogue I/O Three fully configurable LED drivers Single voltage supply: 2.8-4.2V Small form factor: 23.24 x 11.93 x 2.2mm Operating temperature range: -40 C to 85 C Mar 1 2017 EH-MB06 VERSION HISTORY Version V1.0 V1.1 V1.2 V1.3 Comment Current consumption added Addition RX and TX Add aptX model Add Block Diagram Confidential and Proprietary Ehong Technology Co.,Ltd NO PUBLIC DISCLOSURE PERMITTED: Please report postings of this document on public servers or websites to: DCC@ehlink.com.cn Restricted Distribution: Not to be distributed to anyone who is not an employee of either Ehong Technology Co.,Ltd or its affiliated companies without the express approval of Ehong Configuration Management. Not to be used, copied, reproduced, or modified in whole or in part, nor its contents revealed in any manner to others without the express written permission of Ehong Technology Co.,Ltd. This Bluetooth trademark is owned by the Bluetooth SIG Inc., USA and is licensed to Ehong Technologies. All other trademarks listed herein are owned by their respective owners. 2017 Ehong Technology Co.,Ltd. All rights reserved. Ehong Technology Co.,Ltd Page 2 of 23 EH-MB06 Contents 1. Description ..............................................................................................................................................................5 2. Application .............................................................................................................................................................. 5 3. EH-MB06 Product numbering ............................................................................................................................ 5 4. Electrical Characteristic ...................................................................................................................................... 6 4.1. Block Diagram ................................................................................................................................................. 6 4.2. Recommend operation conditions ...............................................................................................................6 4.3. Absolute Maximum Rating ...............................................................................................................................7 4.4. Input/output Terminal Characteristics ........................................................................................................... 7 4.4.1. Digital Terminals ....................................................................................................................................... 7 4.4.2. USB .............................................................................................................................................................8 5. Pinout and Terminal Description ...................................................................................................................... 8 5.1. Pin Configuration ..............................................................................................................................................8 6. Physical Interfaces ..............................................................................................................................................11 6.1. Power Supply ..................................................................................................................................................11 6.2. Reset ................................................................................................................................................................ 12 6.3. PIO ....................................................................................................................................................................12 6.4. AIO ....................................................................................................................................................................12 6.5. RF interface .....................................................................................................................................................12 6.6. UART ................................................................................................................................................................12 6.7. Digital Audio Interfaces ................................................................................................................................. 13 6.7.1. PCM .......................................................................................................................................................... 14 6.7.2. Digital Audio Interface (I2S) .................................................................................................................. 14 6.7.3. IEC 60958 Interface (SPDIF) ................................................................................................................ 17 6.8. Microphone input ............................................................................................................................................18 6.9. Analog Output stage ...................................................................................................................................... 19 6.10. USB ................................................................................................................................................................ 19 7. EH-MB06 Reference Design ............................................................................................................................. 21 8. Mechanical and PCB Footprint Characteristics ..........................................................................................21 9. Soldering Recommendations ........................................................................................................................ 23 10. Contact Information ..........................................................................................................................................23 Ehong Technology Co.,Ltd Page 3 of 23 EH-MB06 1. Table of Tables TABLE 1 : RECOMMENDED OPERATING CONDITIONS ...................................................................................................6 TABLE 2 : ABSOLUTE MAXIMUM RATING RECOMMENDED OPERATING CONDITIONS .................................................7 TABLE 4 : DIGITAL TERMINAL ........................................................................................................................................ 7 TABLE 5 : USB TERMINAL ............................................................................................................................................. 8 TABLE 8 PIN TERMINAL DESCRIPTION .................................................................................................................... 11 TABLE 9 : PIN STATUS ON RESET ...............................................................................................................................12 TABLE 10 : POSSIBLE UART SETTINGS ..................................................................................................................... 13 TABLE 11 : ALTERNATIVE FUNCTIONS OF THE DIGITAL AUDIO BUS INTERFACE ON THE PCM INTERFACE ............14 TABLE 12 : DIGITAL AUDIO INTERFACE SLAVE TIMING ..............................................................................................16 TABLE 13 : DIGITAL AUDIO INTERFACE MASTER TIMING .......................................................................................... 16 TABLE 14 : USB INTERFACE COMPONENT VALUES ...................................................................................................20 2. Table of Figures FIGURE 1 PINOUT OF EH-MB06 ............................................................................................................................... 9 FIGURE 2 POWER SUPPLY PCB DESIGN ................................................................................................................11 FIGURE 3 CONNECTION TO HOST DEVICE .............................................................................................................. 13 FIGURE 7 : AUDIO INTERFACE .................................................................................................................................... 13 FIGURE 8 : DIGITAL AUDIO INTERFACE MODES .........................................................................................................15 FIGURE 9 : DIGITAL AUDIO INTERFACE SLAVE TIMING ..............................................................................................16 FIGURE 10 : DIGITAL AUDIO INTERFACE MASTER TIMING ........................................................................................ 16 FIGURE 11 : EXAMPLE CIRCUIT FOR SPDIF INTERFACE (CO-AXIAL) .......................................................................17 FIGURE 12 : EXAMPLE CIRCUIT FOR SPDIF INTERFACE (OPTICAL) ......................................................................... 17 FIGURE 13 : MICROPHONE BIASING (SINGLE CHANNEL SHOWN) ............................................................................. 18 FIGURE 14 : SPEAKER OUTPUT ................................................................................................................................... 19 FIGURE 15 : USB CONNECTIONS ................................................................................................................................20 FIGURE 16 : REFERENCE DESIGN ............................................................................................................................... 21 FIGURE 17 : RECOMMENDED PCB MOUNTING PATTERN (UNIT: MM, DEVIATION:0.02MM)TOP VIEW .................. 21 FIGURE 18 : CLEARANCE AREA OF ANTENNA ............................................................................................................ 22 Ehong Technology Co.,Ltd Page 4 of 23 EH-MB06 1. Description The EH-MB06 is an easy to use Bluetooth module, compliant with Bluetooth v5.1. The module provides complete RF platform in a small form factor. The module enables electronic devices with wireless connectivity, not requiring any RF experience or expertise for integration into the final product. The module being a certified solution optimizes the time to market of the final application. The module built-in enhanced Kalimba DSP coprocessor with 120MIPS, supports enhanced audio and DSP Applications ( AAC, SBC codec1-Mic Qualcomm@cVc).Support GATT,A2DP, AVRCP, HSP, HFP,SPP, iAP and PBAP Profiles communication with smart ready devices. 2. Application Home entertainment eco-system Smart remote controllers Wired or wireless sound bars Wired or wireless speakers and headphones Bluetooth low energy connectivity to external 3D glasses Tablets / PCs / Mobile Connectivity Wired or wireless headphones for music / gaming / multimedia content Wired or wireless speakers Mono Headsets for voice 3. EH-MB06 Product numbering EH-MB06(C) A. EH ------------- Company Name (Ehong) B. MB06 ------------ Module Name C. C -------------

support aptX Ehong Technology Co.,Ltd Page 5 of 23 4. Electrical Characteristic 4.1. Block Diagram EH-MB06 EH-MB06 4.2. Recommend operation conditions Operating Condition Operating Temperature Range PIO Voltage AIO Voltage LED VDD Voltage VCHG(a) RF frequency Min

-40

+1.7

+1.7

+1.1

+2.7

+4.75 2400 Typical

+3.3

+1.8 3.7

+3.3

+5 Max

+85

+3.6

+1.95

+3.6

+3.6

+5.75 Unit C V V V V V 2441 2480 MHz Table 1: Recommended Operating Conditions Ehong Technology Co.,Ltd Page 6 of 23 4.3. Absolute Maximum Rating Rating Storage Temperature PIO Voltage AIO Voltage LED VDD Voltage VCHG USB_DP/USB_DN Voltage Other Terminal Voltages EH-MB06 Min

-40

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4 Max

+125

+3.6

+1.95

+3.6

+3.6

+7.0

+3.6 VSS-0.4 VDD+0.4 Unit C V V V V V V V Table 2: Absolute Maximum Rating Recommended Operating Conditions 4.4. Input/output Terminal Characteristics Min Type Max Unit 4.4.1. Digital Terminals Digital Terminals Input Voltage VIL input logic level low VIH input logic level high Tr/Tf Output Voltage VOL output logic level low, lOL = 4.0mA

-0.4 0.7 x VDD

VOH output logic level high, lOH = -

4.0mA Tr/Tf 0.75 X VDD

Input and Tristate Currents Strong pull-up

-150

-40

-10 Strong pull-down Weak pull-up Weak pull-down CI Input Capacitance 10

-5 0.33 1.0 40

-1.0 1.0

150

-0.33 5.0 5.0 Table 3: Digital Terminal Ehong Technology Co.,Ltd Page 7 of 23 0.4 VDD + 0.4 V V

25 0.4

5 ns V V ns A A A A pF 4.4.2. USB VDD_USB for correct USB operation Min 3.10 Type 3.30 Max 3.60 Input Threshold VIL input logic level low VIH input logic level high Input Leakage Current VSS_DIG < VIN < VDD_USB(a) CI input capacitance

0.70 x VDD_

-1 2.5 Output Voltage Levels to Correctly Terminated USB Cable VOL output logic level low VOH output logic level high 0 2.80 Table 4: USB Terminal 0.30 x VDD_USB

5 1

- 10

- 0.2

-VDD_USB 5. Pinout and Terminal Description 5.1. Pin Configuration EH-MB06 Unit V V V A pF V V FCC ID: 2ACCRMB06 IC: 22745-MB06 HVIN: EH-MB06 Ehong Technology Co.,Ltd Page 8 of 23 Pin Symbol I/O Type Description Figure 1Pinout of EH-MB06 EH-MB06 GND Ground Ground RESETB CMOS input with weak internal pull-up Active LOW RESETB, input debounced so must be low for >5ms to cause a RESETB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 NC USB_VBUS NC NC LED0 PIO4 PIO18 MIC_RP Analog or digital input/

open drain output. Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down internal pull-down Analog MIC_RN Analog Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down PIO2 PIO3 PIO19 GND PIO17 GND RF GND Supply to SMPS power switch from charger input. General-purpose analog/digital input or open drain LED output. Programmable I/O line 4. Alternative function:

TBR_MOSI[1]

Programmable I/O line 18. Alternative function:

PCM_DOUT[0]

Microphone differential 2 input, positive. Alternative function:

Differential audio line input right, positive Microphone differential 2 input, negative. Alternative function:

Differential audio line input right, negative Programmable I/O line 2. Alternative function:

TBR_MISO[3]

Programmable I/O line 3. Alternative function:

TBR_MISO[2]

Programmable I/O line 19. Alternative function:

PCM_DIN[0]

Programmable I/O line 17. Alternative function:

PCM_SYNC RF Bluetooth transmit/receive. Ehong Technology Co.,Ltd Page 9 of 23 20 21 22 23 24 25 26 PIO16 AIO5 GND MIC_LP Digital: Bidirectional with programmable strength internal pull up/pull-down Analog or digital input/

open drain output. Analog internal pull-down MIC_LN Analog SPK_LN Analog SPK_LP Analog 27 SPK_RN Analog 28 SPK_RP Analog 29 30 31 32 33 34 35 PIO21 VBAT USB_DP USB_DN GND PIO15 PIO20 Digital: Bidirectional with programmable strength internal pull up/pull-down Supply Digital Digital Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down EH-MB06 Programmable I/O line 16. Alternative function:

PCM_CLK General-purpose analog/digital input or open drain LED output. Microphone differential 1 input, negative. Alternative function:

Differential audio line input left, negative Microphone differential 1 input, positive. Alternative function:

Differential audio line input left, positive Headphone/speaker differential left output, negative. Alternative function:

Differential left line output, negative Headphone/speaker differential left output, positive. Alternative function:

Differential left line output, positive Headphone/speaker differential right output, negative. Alternative function:

Differential right line output, negative Headphone/speaker differential right output, positive. Alternative function:

Differential right line output, positive Programmable I/O line 21. Alternative function:

PCM_DOUT[2]

Supply to SMPS power switch from battery.

+2.7V- +3.6V power input USB Full Speed device D+ I/O. IEC-61000-4-2 (device level) ESD Protection USB Full Speed device D- I/O. IEC-61000-4-2 (device level) ESD Protection Programmable I/O line 15. Alternative function:

MCLK_OUT Programmable I/O line 20. Alternative function:

PCM_DOUT[1]

Ehong Technology Co.,Ltd Page 10 of 23 36 37 38 39 40 41 42 PIO5 GND 22 23 8 7 6 Digital: Bidirectional with programmable strength internal pull up/pull-down Analogue Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down Digital: Bidirectional with programmable strength internal pull up/pull-down EH-MB06 Programmable I/O line 5. Alternative function:

TBR_MISO[1]

Microphone input negative, right Programmable I/O line 22. (UART_TX) Programmable I/O line 23. (UART_RX) Programmable I/O line 8. Alternative function:

TBR_CLK Programmable I/O line 7. Alternative function:

TBR_MISO[0]

Programmable I/O line 6. Alternative function:

TBR_MOSI[0]

Table 5PIN Terminal Description 6. Physical Interfaces The module DC3.3V power input. Power supply pin connection capacitor to chip and pin as far as possible close 6.1. Power Supply

- Capacitor decouples power to the chip

- Capacitor prevents noise coupling back to power plane.

. Figure 2Power Supply PCB Design Ehong Technology Co.,Ltd Page 11 of 23 EH-MB06 6.2. Reset The module may be reset from several sources: RESETB pin, power-on reset, a UART break character or via software configured watchdog timer. The RESETB pin is an active low RESETB and is internally filtered using the internal low frequency clock oscillator. A RESETB will be performed between 1.5 and 4.0ms following RESETB being active. It is recommended that RESETB be applied for a period greater than 5ms. QSPI_SRAM_CS QSPI_FLASH_CS QSPI_SRAM_CLK QSPI_FLASH_CLK Strong PU Strong PU Strong PD Strong PD Table 6: Pin Status on Reset 6.3. PIO EH-MB06 has a total of 13digital programmable I/O terminals. They are powered from VDD . Their functions depend on firmware running on the device. PIO lines can be configured through software to have either weak or strong pull-ups or pull-downs. Note:

All PIO lines are configured as inputs with weak pull-downs at reset. Any of the PIO lines can be configured as interrupt request lines or as wake-up lines from sleep modes. 6.4. AIO EH-MB06 has 2 analogue I/O terminals. Their functions depend on software. Typically ADC functions can be configured to battery voltage measurement. They can also be used as a digital PIO. 6.5. RF interface EH-MB06 internet chip antenna and U.fl port choose one of the ways. U.fl port external antenna, impedance is 50 ohm. 6.6. UART This is a standard UART interface for communicating with other serial devices. The UART interface provides a simple mechanism for communicating with other serial devices using the RS232 protocol. The UART CTS and RTS signals can be used to implement RS232 hardware flow control where both are active low indicators. Ehong Technology Co.,Ltd Page 12 of 23 Bits per Byte 8 Table 7: Possible UART Settings EH-MB06 Figure 3Connection To Host device 6.7. Digital Audio Interfaces The audio interface circuit consists of:

Stereo/Dual-mono audio codec Dual audio inputs and outputs 6 digital MEMS microphone inputs A configurable PCM, IS or SPDIF interface Figure 2 outlines the functional blocks of the interface. The codec supports stereo playback and recording of audio signals at multiple sample rates with a resolution of 16-bit. The ADC and the DAC of the codec each contain 2 independent channels. Any ADC or DAC channel can be run at its own independent sample rate. Figure 4 : Audio Interface Ehong Technology Co.,Ltd Page 13 of 23 The interface for the digital audio bus shares the same pins as the PCM codec interface described in Table 8, which means each of the audio buses are mutually exclusive in their usage. Table 8 lists these alternative functions. EH-MB06 PCM Interface SPDIF Interface PCM_OUT PCM_IN PCM_SYNC PCM_CLK SPDIF_OUT SPDIF_IN

IS Interface SD_OUT SD_IN WS SCK Table 8: Alternative Functions of the Digital Audio Bus Interface on the PCM Interface The audio input circuitry consists of a dual audio input that can be configured to be either single-ended or fully differential and programmed for either microphone or line input. It has an analogue and digital programmable gain stage for optimization of different microphones. The audio output circuitry consists of a dual differential class A-B output stage. 6.7.1. PCM The audio pulse code modulation (PCM) interface supports continuous transmission and reception of PCM encoded audio data over Bluetooth. Hardware on EH-MB06 allows the data to be sent to and received from a SCO connection. Up to three SCO connections can be supported by the PCM interface at any one time. EH-MB06 can operate as the PCM interface master generating PCM_SYNC and PCM_CLK or as a PCM interface slave accepting externally generated PCM_SYNC and PCM_CLK. EH-MB06 is compatible with a variety of clock formats, including Long Frame Sync, Short Frame Sync and GCI timing environments. It supports 13-bit or 16-bit linear, 8-bit u-law or A-law companded sample formats and can receive and transmit on any selection of three of the first four slots following PCM_SYNC. EH-MB06 interfaces directly to PCM audio devices including the following:

Qualcomm MSM 3000 series and MSM 5000 series CDMA baseband devices OKI MSM7705 four channel A-law and -law CODEC Motorola MC145481 8-bit A-law and -law CODEC Motorola MC145483 13-bit linear CODEC STW 5093 and 5094 14-bit linear CODECs(8) EH-MB06 is also compatible with the Motorola SSI interface 6.7.2. Digital Audio Interface (I2S) The digital audio interface supports the industry standard formats for I2S, left-justified or right-

justified. The interface shares the same pins of the PCM interface as Table 8. Special firmware is needed if I2S is used. Contact EHong for the special firmware when use I2S as the interface between the module and the host or the codec. The I2S support following formats. Ehong Technology Co.,Ltd Page 14 of 23 EH-MB06 Figure 5 : Digital Audio Interface Modes Symbol

tch tcl topd tssu tsh tisu Parameter SCK Frequency WS Frequency SCK high time SCK low time SCK to SD_OUT delay WS to SCK set up time WS to SCK hold time SD_IN to SCK set-up time Min

Typical Max

6.2

80 80

20 20 20

96

20

Unit MHz kHz ns ns ns ns ns ns Ehong Technology Co.,Ltd Page 15 of 23 tih SD_IN to SCK hold time 20

ns Table 9 : Digital Audio Interface Slave Timing EH-MB06 Figure 6 : Digital Audio Interface Slave Timing Symbol

topd tspd tisu tih Parameter SCK Frequency WS Frequency SCK to SD_OUT delay SCK to WS delay SD_IN to SCK set-up time SD_IN to SCK hold time Min

20 10 Typical Max

6.2

96 20 20

Unit MHz kHz ns ns ns ns Table 10 : Digital Audio Interface Master Timing Figure 7 : Digital Audio Interface Master Timing Ehong Technology Co.,Ltd Page 16 of 23 EH-MB06 6.7.3. IEC 60958 Interface (SPDIF) The IEC 60958 interface is a digital audio interface that uses bi-phase coding to minimise the DC content of the transmitted signal and allows the receiver to decode the clock information from the transmitted signal. The IEC 60958 specification is based on the 2 industry standards:

AES/EBU Sony and Philips interface specification SPDIF The interface is compatible with IEC 60958-1, IEC 60958-3 and IEC 60958-4. The SPDIF interface signals are SPDIF_IN and SPDIF_OUT and are shared on the PCM interface pins. The input and output stages of the SPDIF pins can interface to:

A 75 coaxial cable with an RCA connector, see Figure 8. An optical link that uses Toslink optical components, see Figure 9. Figure 8: Example Circuit for SPDIF In Connector Figure 9: Example Circuit for SPDIF Out Connector Ehong Technology Co.,Ltd Page 17 of 23 EH-MB06 6.8. Microphone input The module contains 2 independent low-noise microphone bias generators. The microphone bias generators are recommended for biasing electric condensor microphones. Figure 9.6 shows a biasing circuit for microphones with a sensitivity between about 40 to 60dB (0dB = 1V/Pa):

Where:

The microphone bias generators derives their power from VBAT or VOUT_3V3 \

and requires no capacitor on its output. The microphone bias generators maintains regulation within the limits 70A to 2.8mA, supporting a 2mA source typically required by 2 electret condensor microphones. If the microphone sits below these limits, then the microphone output must be pre-loaded with a large value resistor to ground. Biasing resistors R1 and R2 equal 2.2k. The input impedance at MIC_LN, MIC_LP, MIC_RN and MIC_RP is typically 6k. C1, C2, C3 and C4 are 100/150nF if bass roll-off is required to limit wind noise on the microphone. R1 and R2 set the microphone load impedance and are normally around 2.2k. Figure 10: Microphone Biasing (Single Channel Shown) Ehong Technology Co.,Ltd Page 18 of 23 EH-MB06 The microphone bias characteristics include:

Power supply:

QCC2032 microphone supply is VBAT (via SMP_VBAT) or VOUT_3V3 (via SMPS_3V3) Minimum input voltage = Output voltage + drop-out voltage Maximum input voltage is 4.25V Drop-out voltage:

300mV maximum Output voltage:

1.8V or 2.6V Tolerance 90% to 110%

Output current:

70A to 2.8mA No load capacitor required Analog Output stage 6.9. The output stage digital circuitry converts the signal from 16-bit per sample, linear PCM of variable sampling frequency to a 2Mbits/s 5-bit multi-bit bit stream, which is fed into the analogue output circuitry. The output stage circuit is comprised a DAC with gain setting and class AB amplifier. The output is available as a differential signal between SPKR_A_N and SPKR_L_P for the right channel, as Figure 6 shows, and between SPKL_B_N and SPKL_B_P for the left channel. Figure 11: Speaker output 6.10. USB This is a full speed (12M bits/s) USB interface for communicating with other compatible digital devices. The module acts as a USB peripheral, responding to request from a master host controller, such as a PC. The USB interface is capable of driving a USB cable directly. No external USB transceiver is required. The device operates as a USB peripheral, responding to requests from a master host controller such as a PC. Both the OHCI and the UHCI standards are supported. The set of USB endpoints implemented can behave as specified in the USB section of the Bluetooth specification v2.1+EDR or alternatively can appear as a set of endpoints appropriate to USB audio devices such as speakers. The module has an internal USB pull-up resistor. This pulls the USB_DP pin weakly high when module is ready to enumerate. It signals to the USB master that it is a full speed (12Mbit/s) USB device. Ehong Technology Co.,Ltd Page 19 of 23 EH-MB06 Figure 12: USB Connections Identifier Rs Value Function 27 Nominal Impedance matching to USB cable Table 11: USB Interface Component Values Note:

USB_ON is only used when the firmware need an input to detect if USB is connected and the USB function shall be enabled. In such case it is shared with the module PIO terminals. If detection is not needed (firmware already runs with USB, such as USB DFU or USB CDC), USB_ON is not needed. Ehong Technology Co.,Ltd Page 20 of 23 7. EH-MB06 Reference Design EH-MB06 8. Mechanical and PCB Footprint Characteristics Figure 13: Reference Design Ehong Technology Co.,Ltd Page 21 of 23 Figure 14: Mechanical Drawing EH-MB06 Figure 15: Recommended PCB Mounting Pattern (Unit: mm, Deviation:0.02mm) Ehong Technology Co.,Ltd Page 22 of 23 Soldering Recommendations 9. EH-MB06 is compatible with industrial standard reflow profile for Pb-free solders. The reflow profile used is dependent on the thermal mass of the entire populated PCB, heat transfer efficiency of the oven and particular type of solder paste used. Consult the datasheet of particular solder paste for profile configurations. EH-MB06 SMT stencil making requirements If Bluetooth module PIN pitch 0.25mm and other component PIN pitch 0.25mm ,so you choose SMT stencil thickness 1.5mm If Bluetooth module PIN pitch 0.25mm and other component PIN pitch 0.25mm ,so you choose SMT Ladder stencil Bluetooth module thickness 1.5mm other component thickness 1.3mm . Solder pad open via ratio Length 1:1.2, width 1:1. The EH-MB06 modules can be SMT on the board following the temperature curve graph:

10. Contact Information Sales: sales@ehonglink.com Technical support: support@ehonglink.com Website: www.ehonglink.com Phone: +86 21 64769993 Fax: +86 21 64765833 Address: Room 501, No.485 Xingmei Road, Minhang Dis,Shanghai, China. Ehong Technology Co.,Ltd Page 23 of 23 FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. 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. FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. 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. FCC Label Instructions If using a permanently affixed label, the modular transmitter must be labeled with its own FCC identification number, and, if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following:

Contains FCC ID: 2ACCREH-MB06. Any similar wording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. ISED RSS Warning/ISED RF Exposure Statement ISED RSS Warning:

This device complies with Innovation, Science and Economic Development Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:

(1) this device may not cause interference, and

(2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'ISED applicables aux appareils radio exempts de licence.L'exploitation est autorise aux deux conditions suivantes:

(1) l'appareil ne doit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. ISED RF exposure statement:

This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator&

your body.This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Le rayonnement de la classe b repecte ISED fixaient un environnement non contrls.Installation et mise en uvre de ce matriel devrait avec changeur distance minimale entre 20 cm ton corps.Lanceurs ou ne peuvent pas coexister cette antenne ou capteurs avec d'autres. OEM Guidance 1. Applicable FCC rules This device complies with part 15.247 of the FCC Rules. 2. The specific operational use conditions This module can be used in IoT devices. The input voltage to the module is nominally 3.3 V DC. The operational ambient temperature of the module is -40 C ~ 85 C. An onboard PCB antenna is integrated for this module. 3. Limited module procedures N/A 4. Trace antenna design 5. RF exposure considerations The equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. If the equipment built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093. 6. Antenna Antenna type: PCB antenna; Peak antenna gain : 2 dBi 7. Label and compliance information An exterior label on OEMs end product can use wording such as the following: Contains Transmitter Module FCC ID: 2ACCREH-MB06 or Contains FCC ID: 2ACCREH-MB06 8. Information on test modes and additional testing requirements 6. The modular transmitter has been fully tested by the module grantee on the required number of channels,modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter,perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions). 7. emissions with the other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-

alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance. The testing should check for emissions that may occur due to the intermixing of 8. If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference have been corrected . 9. Additional testing, Part 15 Sub part B disclaimer The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through

(a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation When testing the host product, all the transmitters must be operating. The transmitters can be enabled by using publicly-available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory 50 devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content. ISED Important Note:

In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the Canada authorization is no longer considered valid and the ISED cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate Canada authorization. Any company of the host device which install this modular with limit modular approval should perform the test of radiated emission and spurious emission according to RSS-247 and RSSGen requirement, only if the test result comply with RSS-247 and RSS-Gen requirement, then the host can be sold legally. Note Importante:

Dans le cas o ces conditions ne peuvent tre satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre metteur), l'autorisation du Canada n'est plus considr comme valide et l' ISED ne peut pas tre utilis sur le produit final. Dans ces circonstances, l'intgrateur OEM sera charg de rvaluer le produit final (y compris l'metteur) et l'obtention d'une autorisation distincte au Canada. toute entreprise de l'hte qui installent ce dispositif modulaire avec limite approbation devrait effectuer l'essai des modules et des rayonnements non essentiels des missions rayonnes selon rss-247 et le cnr - gen, seulement si le rsultat d'essai conforme rss-247 et le cnr - gen, puis l'hte peut tre vendu lgalement. End Product Labeling The final end product must be labeled in a visible area with the following: Contains IC:22745-MB06. Plaque signaltique du produit final Le produit final doit tre tiquet dans un endroit visible avec l'inscription suivante: Contient des IC:22745-MB06. Manual Information to the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Manuel d'information l'utilisateur final L'intgrateur OEM doit tre conscient de ne pas fournir des informations l'utilisateur final quant la faon d'installer ou de supprimer ce module RF dans le manuel de l'utilisateur du produit final qui intgre ce module. Le manuel de l'utilisateur final doit inclure toutes les informations rglementaires requises et avertissements comme indiqu dans ce manuel. This radio transmitter [22745-MB06] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, It has an antenna with the maximum antenna gain is 2dBi. Antenna type Maximum Antenna gain PCB Antenna 2dBi Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Cet metteur radio [22745-MB06] a t approuv par Innovation, Science et dveloppement conomique Canada pour fonctionner avec les types dantenne numrs ci-dessous. Il dispose d'une antenne avec une prise le gain maximum d'antenne est de 2dBi. Antenna type Maximum Antenna gain PCB Antenna 2dBi Les types d'antennes non inclus dans cette liste qui ont un gain suprieur au gain maximum indiqu pour tout type rpertori sont strictement interdits pour l'utilisation avec cet appareil.

Ehong EH-MB06 Kg FE CE RS

| Ehong tH-MB06 * |

FCC ID: 2ACCRMBO6 (

(C:22745-MB06 HVINEH MOOS FE bt a

ShangHai Ehong Technology Co.,Ltd. Attestation Letter Date: 2023-03-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 2.911(d)(5)(i)(ii) Filing FCC ID: 2ACCRMB06 , ShangHai Ehong Technology Co.,Ltd. (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. ShangHai Ehong Technology Co.,Ltd. (the applicant) certifies that as of the date of the filing of the appliation, the applicant is not identified on the Covered List as an entity producing covered equipment. Sincerely, Signature Le. Lae}

Contact Person: Rik Tang Title: CEO Company Name & Address: ShangHai Ehong Technology Co.,Ltd. /

Room 501, No.485 Xingmei Road,Minhang district,Shanghai,China gi PAD tA yr ge le F een 2 BAL Any ign 4 pat CFR 47 2.911(d)(5)(i)(ii) Attestation Letter FHS REE

Company Name: ShangHai Ehong Technology Co.,Ltd. Add: Room 501, No.485 Xingmei Road, Minhang district, Shanghai, China Tel: 021-61263536 Fax: 021-61263536 E-mail: rik.tang@ehlink.com.cn FCC Authorization Date:2023-01-13 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We, ShangHai Ehong Technology Co.,Ltd. Hereby authorizes CHINA CERTIFICATION ICT CO., LTD (DONGGUAN) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by CHINA CERTIFICATION ICT CO., LTD (DONGGUAN) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature:

Printed Name: Rik Tang Title: CEO QA-FR-170-B

Company Name: ShangHai Ehong Technology Co.,Ltd. Add: Room 501, No.485 Xingmei Road, Minhang district, Shanghai, China Tel: 021-61263536 Fax: 021-61263536 E-mail: rik.tang@ehlink.com.cn FCC Confidential Authorization Date: 2023-01-13 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2ACCRMB06 In accordance with Sections 0.457 and 0.459 of the Commissions Rules, ShangHai Ehong Technology Co.,Ltd. hereby requests long-term confidential treatment of information accompanying this application as outlined below:

Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature:

Printer Name: Rik Tang Title: CEO QA-FR-171-A

Company Name: ShangHai Ehong Technology Co.,Ltd. Add: Room 501, No.485 Xingmei Road, Minhang district, Shanghai, China Tel: 021-61263536 Fax: 021-61263536 E-mail: rik.tang@ehlink.com.cn Modular Approval Letter Date:2023-01-13 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 We, ShangHai Ehong Technology Co.,Ltd., hereby request Modular Approval for Product: BT Module (Model number:EH-MB06, FCC ID: 2ACCRMB06).The EUT meets all of the requirement for modular approval as detailed in FCC 15.212. the requirements is described below:

1. The modular has RF shielding, please refer to the EUT photo. 2. The modular transmitter has buffered modulation/data inputs, Buffered data inputs stage has been integrated in chip (Model: QCC3021). 3. The modular transmitter has its own power supply regulation. Please refer to the Schematic. 4. Comply with the antenna requirements of Section 15.203 and 15.204(c), the modular transmitter has a PCB antenna when testing. Employ a unique antenna coupler; please refer to the EUT photo. 5. The EUT was tested in a stand-alone configuration, please refer to setup photos exhibit for details. 6. The module labeled with its own FCC ID. 7. Comply with any specific rules or operating requirements that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. The necessary explanation to be complied with this requirement is contained in the user manual; band please refers to the User Manual. 8. Comply with FCC 15.247 (i) & 1.1310 & 2.1091 RF exposure requirements in its final configuration. Sincerely, Signature:

Print Name: Rik Tang Title: CEO

U.S. AGENT LETTER OF ATTESTATION Date: 2023-03-22 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 2.911(d)(7) Filing FCC ID: 2ACCRMB06 ShangHai Ehong Technology Co.,Ltd. (the Applicant) certifies that, as of the date of the filing of the application, Iconsigh Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. ShangHai Ehong Technology Co.,Ltd. (the Applicant) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Iconsigh Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information:

Company Name: Iconsigh Inc. Address: 2310 Homestead Road, Suite C1, Los Altos, CA, 94024, USA FRN: 0033398652 Tel.: +1 (408) 320-9867 Email: benjamin.kaur@iconsigh.com Signed by (printed name): Benjamin Kaur Signature: Bewyonw vane Applicant: ShangHai Ehong Technology Co.,Ltd. Address: Room 501, No.485 Xingmei Road, Minhang district, Shanghai, China FRN: 0023604044 Tel: 021-61263536 Email: rik.tang@ehlink.com.cn Signed by (printed name): Rik Tang Signature: tbe Tae}

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