CH32V203 pinout

CH32V203

Pin Number	Pin Name	Net Name	Direction	Notes
1	VBAT	VBAT	Power	Regulated 2.5V supply
2	PC13	POWER_ON_PULSE	Output	Emit pulse to wake up badge
3	PC14	XTAL	Input	Crystal Oscillator
4	PC15	XTAL	Input	Crystal Oscillator
5	PD0	AMP_EN	Output	Enable audio speaker amplifier
6	PD1	USB_ENABLE	Output	Enable to USB-A OTG port
7	NRST	NRST	Input	3V3
8	VSSA	VSSA	Power	Analog Ground
9	VDDA	VDDA	Power	Analog Power
10	PA0	INT	Output	Interrupt line to ESP32-P4
11	PA1	KB_ROW5	Output	Keyboard IO
12	PA2	KB_ROW8	Output	Keyboard IO
13	PA3	KB_ROW4	Output	Keyboard IO
14	PA4	KB_ROW3	Output	Keyboard IO
15	PA5	KB_ROW7	Output	Keyboard IO
16	PA6	KB_ROW6	Output	Keyboard IO
17	PA7	KB_COL3	Input	Keyboard IO
18	PB0	KB_COL7	Input	Keyboard IO
19	PB1	KB_COL2	Input	Keyboard IO
20	PB2/BOOT1	KB_COL6	Input	Keyboard IO
21	PB10	PM_SCL	Output	I2C Clock PMIC (Power controller)
22	PB11	PM_SDA	Bidirectional	I2C Data PMIC
23	VSS1	GND	Power	Ground
24	VDDIO1	+3.3V	Power	Power Supply
25	PB12	KB_COL1	Input	Keyboard IO
26	PB13	KB_COL5	Input	Keyboard IO
27	PB14	KB_COL0	Input	Keyboard IO
28	PB15	KB_COL4	Input	Keyboard IO
29	PA8	KB_ROW0	Output	Keyboard IO
30	PA9	KB_ROW1	Output	Keyboard IO
31	PA10	KB_ROW2	Output	Keyboard IO
32	PA11	LED_DATA	Output	Serial data to SK6805 LEDs
33	PA12	POWER_BTN	Input	Power button input (low when pressed)
34	PA13	SWDIO	Bidirectional	Debug Interface CH32V203
35	VSS2	GND	Power	Ground
36	VDD2	+3.3V	Power	Power Supply
37	PA14	SWCLK	Output	Debug Clock
38	PA15	SD_DET	Input	SD card detect
39	PB3	KEYBOARD_BL	Output	Enable backlight Keyboard
40	PB4	DISPLAY_BL	Output	Enable backlight display
41	PB5	HP_DET	Input	Head phone detect
42	PB6	SCL	input	I2C Clock shared bus
43	PB7	SDA	Bidirectional	I2C Data shared bus
44	BOOT0	DCAM_IO0	Output	Camera module power enable (if present)
45	PB8	RADIO_ENABLE / CAM_IO0	Output	Enable C6 and MIPI_CSI camera IO 0
46	PB9	PM_INT	Input	Interrupt signal PMIC
47	VSS3	GND	Power	GND
48	VDDIO3	+3.3V	Power	Power

Last modified March 23, 2025: Added testing status (03f21d3)