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CH32X035/CH32X033

SWCLK SWDIO TX1 RX1 TX2 RX2 TX3 RX3 TX4 RX4
PC19 PC18 PB10 PB11 PA2 PA3 PB3 PB4 PB0 PB1

Pin Alternate Functions [ALL] [ADC] [I2C] [SPI] [SYS] [TIM] [UART/USART] [USB]

Official Site

Datasheet

System Block Diagram

CH32V103

GPIO Definitions

CH32​X035​R8T6​(LQFP​64M) CH32​X035​C8T6​(LQFP​48) CH32​X035​G8U6​(QFN​28) CH32​X035​G8R6​(QSOP​28) CH32​X035​F8U6​(QFN​20) CH32​X035​F7P6​(TSSOP​20) CH32​X033​F8P6​(TSSOP​20) Pin name Pin type Main function​(after reset) Note
14 10 5 9 2 6 14 PA0 I/O/A PA0
15 11 6 10 3 7 15 PA1 I/O/A PA1
16 12 7 11 4 8 16 PA2 I/O/A PA2 TX2
17 13 8 12 5 9 17 PA3 I/O/A PA3 RX2
20 14 9 15 6 10 19 PA4 I/O/A PA4
21 15 10 16 7 11 20 PA5 I/O/A PA5
22 16 11 13 8 12 1 PA6 I/O/A PA6
23 17 12 17 9 13 2 PA7 I/O/A PA7
56 40 - - - - - PA8 I/O PA8
57 41 - - - - 10 PA9 I/O PA9
58 42 - - - - 12 PA10 I/O PA10
59 43 - - - - 11 PA11 I/O/A PA11
60 44 - 4 - - - PA12 I/O/A PA12
61 45 - 5 - - - PA13 I/O/A PA13
62 46 - - - - - PA14 I/O/A PA14
1 1 - - - - - PA15 I/O PA15
2 2 - - - - - PA16 I/O PA16
3 3 - - - - - PA17 I/O PA17
4 4 - - - - - PA18 I/O PA18
5 5 - - - - - PA19 I/O PA19
6 6 - - - - - PA20 I/O PA20
7 7 - - - - - PA21 I/O PA21
12 8 - - - - - PA22 I/O/A PA22
13 9 - - - - - PA23 I/O/A PA23
26 20 13 14 10 - 2 PB0 I/O/A PB0 TX4
27 21 16 20 11 14 3 PB1 I/O/A PB1 RX4
28 22 - - - - - PB2 I/O/A PB2
29 23 14 18 12 - - PB3 I/O/A PB3 TX3
30 24 15 19 - - - PB4 I/O/A PB4 RX3
33 25 16 20 - - - PB5 I/O/A PB5
34 26 17 21 - - - PB6 I/O/A PB6
35 27 18 22 - - 4 PB7 I/O/A PB7
36 28 19 23 - - - PB8 I/O/A PB8
41 29 20 24 - - - PB9 I/O PB9
42 30 21 25 - - - PB10 I/O PB10 TX1
43 31 22 26 13 - - PB11 I/O PB11 RX1
47 35 23 27 15 1 - PB12 I/O PB12
48 36 - - - - - PB13 I/O PB13
50 - - - - - - PB14 I/O PB14
53 - - - - - - PB15 I/O PB15
37 - - - - - - PB16 I/O PB16
38 - - - - - - PB17 I/O PB17
39 - - - - - - PB18 I/O PB18
40 - - - - - PB19 I/O PB19
51 - - - - - - PB20 I/O PB20
52 - - - - - - PB21 I/O PB21
8 - 3 - - - - PC0 I/O/A PC0
9 - - - - 5 - PC1 I/O/A PC1
10 - - - - - - PC2 I/O/A PC2
11 - 4 8 - 4 13 PC3 I/O/A PC3
18 - - - - - - PC4 I/O PC4
19 - - - - - - PC5 I/O PC5
24 18 - - - - - PC6 I/O PC6
25 19 - - - - - PC7 I/O PC7
54 38 28 4 19 2 - PC14 I/O/A PC14
55 39 1 5 20 3 - PC15 I/O/A PC15
44 32 26 2 17 17 5 PC16 I/O/A PC16
45 33 27 3 18 18 6 PC17 I/O/A PC17
46 34 25 28 14 19 8 PC18 I/O PC18 SWDIO
49 37 24 1 16 20 18 PC19 I/O/A PC19 SWCLK

Errata

  • Channel 3, channel 7, channel 11, channel 15 and I2C functions of the ADC are not available for products with a lot number with a penultimate 5 digit of 0;

System Architecture

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