2.2 BM83 Module Pin Description

The following table describes the pin description of the BM83 module.

Table 2-2. BM83 Module Pin Description
Pin Number	Pin Name	Pin Type	Description
1	DR1	I	I²S interface: digital left/right data
2	RFS1	I/O	I²S interface: digital left/right clock
3	SCLK1	I/ O	I²S interface: bit clock
4	DT1	O	I²S interface: digital left/right data
5	MCLK1	O	I²S interface: master clock
6	AOHPR	O	R-channel analog headphone output
7	AOHPM	O	Headphone common mode output/sense input
8	AOHPL	O	L-channel analog headphone output
9	MICN2	I	MIC 2 mono differential analog negative input
10	MICP2	I	MIC 2 mono differential analog positive input
11	AIR	I	R-channel single-ended analog input
12	AIL	I	L-channel single-ended analog input
13	MICN1	I	MIC 1 mono differential analog negative input
14	MICP1	I	MIC 1 mono differential analog positive input
15	MICBIAS	P	Electric microphone biasing voltage
16	GND	P	Ground reference
17	DMIC_CLK	O	Digital MIC clock output
18	DMIC1_R	I	Digital MIC right input
19	DMIC1_L	I	Digital MIC left input
20	P3_2	I/O	General purpose I/O port P3_2 By default, this is configured as AUX_IN DETECT
21	P2_6	I/O	General purpose I/O port P2_6
22	ADAP_IN	P	5V power adapter input To charge the battery in the Li-ion battery powered applications To be used for USB Device Firmware Upgrade (DFU) Otherwise it can be left floating
23	BAT_IN	P	Power supply input; voltage range: 3.2V to 4.2V Source can either be a Li-ion battery or any other power rail on the host board
24	SYS_PWR	P	System power output derived from the ADAP_IN or BAT_IN input Only for internal use Do not connect to any other devices LED1 and LED2 can be connected to SYS_PWR
25	VDD_IO	P	I/O power supply, do not connect, for internal use only (connected to LDO31_VO)
26	PWR (MFB)	I	Multi-function push button and Power On key
27	SK1_AMB_DET	I	Temperature sense channel 1
28	SK2_KEY_AD	I	Temperature sense channel 2
29	P8_6 / UART_RXD	I/O	General purpose I/O port P8_6 UART RX data
30	P8_5 / UART_TXD	I/O	General purpose I/O port P8_5 UART TX data
31	P3_4 / UART_RTS	I/O	General purpose I/O port P3_4 System configuration pin (Application mode or Test mode) UART RTS
32	LED1	I	LED driver 1
33	P0_2	I/O	General purpose I/O port P0_2 By default, this is configured as play/pause button (user configurable button)
34	LED2	I	LED driver 2
35	P0_6	I/O	General purpose I/O port P0_6
36	DM	I/O	USB data minus data line
37	DP	I/O	USB data positive data line
38	P0_3	I/O	General purpose I/O port P0_3 By default, this is configured as reverse button (user configurable button)
39	P2_7	I/O	General purpose I/O port P2_7 By default, this is configured as volume up button (user configurable button)
40	P0_5	I/O	General purpose I/O port P0_5 By default, this is configured as volume down button (user configurable button)
41	P1_6 / PWM1	I/O	General purpose I/O port P1_6 PWM1 output
42	P2_3	I/O	General purpose I/O port P2_3
43	RST_N	I	System Reset pin (active-low)
44	P0_1	I/O	General purpose I/O port P0_1 By default, this is configured as forward button (user configurable button)
45	P0_7	I/O	General purpose I/O port P0_7
46	P1_2 / TDI_CPU / SCL	I/O	General purpose I/O port P1_2 CPU 2-wire debug data I²C SCL
47	P1_3 / TCK_CPU / SDA	I/O	General purpose I/O port P1_3 CPU 2-wire debug clock I²C SDA
48	P3_7 / UART_CTS	I/O	General purpose I/O port P3_7 UART CTS
49	P0_0 / UART_TX_IND	I/O	General purpose I/O port P0_0 By default, this is configured as an external codec reset (Embedded mode) UART_TX_IND (active-high) used to wake-up the host MCU (Host mode)
50	GND	P	Ground reference

Note: The BM83 module is pre-configured with Embedded mode (see, General Purpose I/O Pins). The GPIOs mentioned in the preceding table can be configured using the Config Tool or the SDK.