CH32F203C8T6

ARM Cortex-M3 Microcontroller

The CH32F203C8T6 is a arm cortex-m3 microcontroller from WCH. View the full CH32F203C8T6 datasheet below including key specifications, pinout, electrical characteristics, absolute maximum ratings.

Official CH32F203C8T6 datasheet (PDF) — the source this page was extracted from.

Manufacturer

WCH

CH32F203C8T6 Key Specifications

Parameter	Value
Core	32-bit ARM Cortex-M3
Max CPU Frequency	144 MHz
SRAM	Up to 20 KB
CodeFlash	Up to 224 KB
USB	2 (Host/Device, Full-Speed)
CAN	1 (2.0B active)
I2C	2 interfaces
USART	4 interfaces
ADC	12-bit
OPA/Comparator	2

CH32F203C8T6 Overview

Part: CH32F203C8T6

Type: 32-bit ARM Cortex-M3 Microcontroller

Description: 32-bit ARM Cortex-M3 core microcontroller operating at up to 144 MHz, featuring dual USB (Host/Device), 1 CAN, 2 operational amplifier comparators, 4 USARTs, 2 I2Cs, 12-bit ADC, 20KB SRAM, and 224KB Flash.

Operating Conditions:

Supply voltage: 2.4–3.6 V (3–3.6 V when using USB)
Operating temperature: -40 to 85 °C
Max system frequency: 144 MHz

Absolute Maximum Ratings:

Max supply voltage: 4.0 V
Max total supply current: 150 mA
Max storage temperature: 125 °C

Key Specs:

Core: 32-bit ARM Cortex-M3
Max CPU Frequency: 144 MHz
SRAM: Up to 20 KB
CodeFlash: Up to 224 KB
USB: 2 (Host/Device, Full-Speed)
CAN: 1 (2.0B active)
I2C: 2 interfaces
USART: 4 interfaces
ADC: 12-bit
OPA/Comparator: 2

Features:

Single-cycle multiplication and hardware division
Interrupt technology, Fault handling mechanism
Dual USB interfaces (Host and Device)
1 CAN interface (2.0B active)
2 operational amplifier comparators
4 USARTs, 2 I2Cs
12-bit ADC, 10 Touchkey channels
Multiple timers
Power-On Reset (POR) / Power-Down Reset (PDR)
Programmable Voltage Detector (PVD)
Sleep, Stop, Standby low-power modes
Serial 2-Wire Debug Interface (SWD)

Package:

LQFP32
LQFP48
QFN48

CH32F203C8T6 Features

l Core:
32-bit ARM Cortex-M3 core
- Single-cycle multiplication and hardware division
- Interrupt technology, Fault handling mechanism
- System main frequency 144MHz

CH32F203C8T6 Pin Configuration

CH32F203C8T6 Pinout

Package: LQFP48 (48-pin Low-Profile Quad Flat Package)

Pin #	Pin Name	Type	Description
1	VBAT	P	Battery Power Supply
2	PC13/TAMPER_RTC	I/O	Port C Pin 13 / Tamper RTC
3	PC14/OSC32IN	I/O	Port C Pin 14 / 32 kHz Oscillator Input
4	PC15/OSC32OUT	I/O	Port C Pin 15 / 32 kHz Oscillator Output
5	OSC_IN/PD0	I/O	Main Oscillator Input / Port D Pin 0
6	OSC_OUT/PD1	I/O	Main Oscillator Output / Port D Pin 1
7	NRST	I	Reset Input
8	VSSA	P	Ground (Analog)
9	VDDA	P	Analog Power Supply
10	PA0/WKUP/ADC0	I/O	Port A Pin 0 / Wakeup / ADC Channel 0
11	PA1/ADC1	I/O	Port A Pin 1 / ADC Channel 1
12	PA2/ADC2	I/O	Port A Pin 2 / ADC Channel 2
13	PA3/ADC3	I/O	Port A Pin 3 / ADC Channel 3
14	PA4/ADC4	I/O	Port A Pin 4 / ADC Channel 4
15	PA5/ADC5	I/O	Port A Pin 5 / ADC Channel 5
16	PA6/ADC6	I/O	Port A Pin 6 / ADC Channel 6
17	PA7/ADC7	I/O	Port A Pin 7 / ADC Channel 7
18	PB0/ADC8	I/O	Port B Pin 0 / ADC Channel 8
19	PB1/ADC9	I/O	Port B Pin 1 / ADC Channel 9
20	PB10	I/O	Port B Pin 10
21	PB11	I/O	Port B Pin 11
22	VSS_1	P	Ground
23	VDD_1	P	Digital Power Supply
24	PB12	I/O	Port B Pin 12
25	PB13	I/O	Port B Pin 13
26	PB14	I/O	Port B Pin 14
27	PB15	I/O	Port B Pin 15
28	PA8	I/O	Port A Pin 8
29	PA9	I/O	Port A Pin 9
30	PA10	I/O	Port A Pin 10
31	PA11/USBDM	I/O	Port A Pin 11 / USB Data Minus
32	PA12/USBDP	I/O	Port A Pin 12 / USB Data Plus
33	PA13/SWDIO	I/O	Port A Pin 13 / Serial Wire Debug I/O
34	VSS_2	P	Ground
35	VDD_2	P	Digital Power Supply
36	PA14/SWCLK	I/O	Port A Pin 14 / Serial Wire Debug Clock
37	PA15	I/O	Port A Pin 15
38	PB3	I/O	Port B Pin 3
39	PB4	I/O	Port B Pin 4
40	PB5	I/O	Port B Pin 5
41	PB6	I/O	Port B Pin 6
42	PB7	I/O	Port B Pin 7
43	BOOT0	I	Boot Configuration Pin
44	PB8	I/O	Port B Pin 8
45	PB9	I/O	Port B Pin 9
46	VSS_3	P	Ground
47	VDD_3	P	Digital Power Supply
48	PB10/JTCK	I/O	Port B Pin 10 / JTAG Test Clock

Notes

Power pins: VDD (pins 23, 35, 47), VSS (pins 22, 34, 46), VBAT (pin 1), VDDA (pin 9), VSSA (pin 8)
Debug/Programming: SWDIO (PA13, pin 33), SWCLK (PA14, pin 36), NRST (pin 7), BOOT0 (pin 43)
USB: PA11/USBDM (pin 31), PA12/USBDP (pin 32)
Oscillators: OSC_IN/PD0 (pin 5), OSC_OUT/PD1 (pin 6) for main clock; PC14/OSC32IN (pin 3), PC15/OSC32OUT (pin 4) for 32 kHz RTC clock
ADC channels: PA0–PA7 (pins 10–17), PB0–PB1 (pins 18–19) support analog input
Pin names with slashes (e.g., PA0/WKUP/ADC0) indicate alternate functions on the same physical pin

CH32F203C8T6 Electrical Characteristics

	Other pin injection current		+/-5
∑ I INJ(PIN)	Total injection current for all IO and control pins		+/-25

CH32F203C8T6 Absolute Maximum Ratings

Critical or exceeding absolute maximum ratings may lead to abnormal chip operation or even damage.

CH32F203C8T6 Ordering Information

MPN	Package	Temperature Range	Packing
No ordering information found in this section.

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part Number	Manufacturer	Package
CH32F203	WCH	—
CH32F203C8U6	WCH	QFN-48 7x7mm
CH32F203K8T6	WCH	LQFP-32 7x7mm

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