ED05

Schematic

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  schematic

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  Development board schematic, Button, mic, power part

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  Audio amplification part

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  module pins

Pin Definition

Pin Number	Definition	Input/Output	Description
1	GND	Input/Output	Power Supply GND
2	PIO_14	Input/Output	Programmable I/O
3	PIO_5	Output	Programmable I/O
4	RST	Input	external reset
5	SPI_MOSI	CMOS Input	SPI data input
6	SPI_CLK	CMOS Input	SPI clock
7	SPI_CSB	CMOS Input	CPI chip select
8	SPI_MISO	CMOS Output	SPI data output
9	RLED	Output	status LED 1, normally connect to red
10	BLED	Output	status LED 2, normally connect to blue
11	VREG	Input	ON/OFF, pairing, answering phone
12	1V8	Output	1.8V power output
13	VBAT	Input	lithium battery power supply input terminal end
14	CHG	Input	lithium battery power charging input terminal end
15	GND	Input/Output	Power Supply GND
16	MIC_BIAS	Output	microphone power supply
17	MIC_RP	Input	Positive terminal of the the microphone right channel differential input
18	MIC_RN	Input	Negative terminal of the the microphone right channel differential input
19	MIC_LP	Input	Positive terminal of the the microphone left channel differential input
20	MIC_LN	Input	Negtive terminal of the the microphone left channel differential input
21	GND	Input/Output	Audio GND
22	SPK_RN	Output	Stereo right channel differential output negative terminal
23	SPK_RP	Output	Stereo right channel differential output positive terminal
24	SPK_LN	Output	Stereo left channel differential output negative terminal
25	SPK_LP	Output	Stereo lfet channel differential output positive terminal
26	PIO_13	Input/Output	Programmable I/O
27	PIO_11	Input/Output	Programmable I/O
28	PIO_12	Input/Output	Programmable I/O
29	PIO_9	Input/Output	Programmable I/O
30	GND	Input/Output	Power Supply GND