CH32V002A4M6 Pinout (SOP16)

CH32V002A4M6 is the CH32V003’s successor in a SOP16 package – 4 kB of RAM, more remap options and a package that is easy to solder by hand.

It is a favorite in Panda’s projects on breatharian.eu and is pin-compatible with the CH32V003A4M6.

Specifications

RISC-V (QingKe) at 48 MHz
16 kB flash, 4 kB SRAM
14 GPIO, ADC
USART, I2C, SPI, timers, PWM
3.3 V or 5 V supply
single-wire programming (SWIO on PD1)
SOP16 package

It is programmed with the WCH-LinkE in MounRiver Studio, the Arduino IDE or with ch32fun.

Pinout and pin table

Hover over a pin in the diagram or a table row; use the filter to highlight a bus. You can download the pinout as PNG or SVG.

Download:PNG SVG

License: CC BY 4.0 · How to credit

Pin table – CH32V002A4M6
Pin	Name	Direction	UART	I2C	SPI	PWM	ADC	Remap	Note
1	PC1	input/output		SDA	NSS			1: T2CH1ETR; 2: T1BKIN, T2CH4; 3: T1BKIN, T2CH1ETR, RX; 4: T2CH2; 5: NSS; 7: T1CH2N; 9: T1CH2N
2	PC2	input/output		SCL				1: ADC trigger (ADC_RETR), T1BKIN; 2: T2CH2, RTS; 3: T1ETR; 7: T1CH3N; 9: T1CH3N	USART RTS; T1BKIN
3	PC3	input/output				T1CH3		1: T1CH3; 2: T1CH1N, CTS; 3: T1CH1N; 4: T2CH3; 5: T1CH3
4	PC4	input/output				T1CH4	A2	1: T1CH4; 2: NSS, T1CH2N; 3: T1CH1; 6: NSS; 7: T1CH1; 8: T1CH1; 9: RX	clock output (MCO)
5	PC6	input/output			MOSI			1: MOSI, CTS; 2: SDA, T1CH1; 3: T1CH3N, CTS; 6: RX; 7: T1CH3; 8: T1CH3
6	PC7	input/output			MISO			1: MISO, RTS; 2: T1CH2; 3: T1CH2, T2CH2, RTS; 6: MISO, CTS; 7: T1CH4, CTS; 8: T1CH4
7	PD1	input/output				T1CH3N		1: SCL, T1CH3N; 2: T1CH3N, RX; 4: SDA, T1CH4, TX; 5: T1CH4, RX	Programming and debugging (SWIO, single wire – WCH-LinkE); ADC trigger (ADC_IETR)
8	PD4	input/output				T2CH1ETR	A7	1: T1ETR; 3: T1CH4; 4: SCK, T1ETR; 5: T1ETR; 6: T1ETR; 7: T2CH2; 9: RTS
9	PD5	input/output	TX				A5	1: RX; 3: T2CH4; 4: MISO; 9: CTS
10	PD6	input/output	RX				A6	1: TX; 3: T2CH3; 4: MOSI
11	PD7	input/output				T2CH4		1: T2CH4; 4: CTS; 5: CTS	Reset (NRST) by default; usable as GPIO only after switching in the option bytes (RST_MODE = 11)
12	PA1	input/output				T1CH2	A1	1: T1CH2; 5: SCK, T2CH2; 6: T2CH2; 8: RX; 9: T1CH2	Krystal (OSCI)
13	PA2	input/output				T1CH2N	A0	1: ADC trigger (ADC_IETR), T1CH2N; 4: T1CH2N; 5: MOSI, T1CH2N, T2CH3; 6: T1CH2N, T2CH3; 7: T2CH3; 9: T1CH3	Krystal (OSCO)
14	VSS	–
15	VDD	input							Power 3.3 V or 5 V
16	PC0	input/output				T2CH3		1: NSS, T2CH3; 2: T1CH3; 3: MOSI, TX; 4: T2CH1ETR; 7: T1CH1N; 9: T1CH1N

What to watch out for

PD1 is the SWIO programming pin – leave it free.
PD7 is reset (NRST) from the factory – free it up as GPIO in the option bytes (RST_MODE = 11).
Logic levels follow the supply voltage (3.3 V or 5 V).
With an external crystal, PA1 and PA2 are taken.