CH32V203C8T6

Part: CH32V203C8T6 — WCH (WCH.cn)

Type: 32-bit RISC-V Microcontroller

Description: Industrial-grade 32-bit RISC-V microcontroller with a QingKe V4B core, operating at up to 144 MHz, featuring up to 224 KB CodeFlash and 64 KB SRAM, dual USB interfaces, CAN, and rich peripherals.

Operating Conditions:

• Supply voltage: 2.4–3.6 V
• Operating temperature: -40 to +85 °C
• CPU clock speed: Max 144 MHz

Absolute Maximum Ratings:

• Max supply voltage: 3.6 V (VDD, VI/O, VDDA)

Key Specs:

• Core: QingKe 32-bit RISC-V V4B
• Max CPU Frequency: 144 MHz
• Program Memory (CodeFlash): Up to 224 KB
• Volatile Data Storage (SRAM): Up to 64 KB
• ADC: 2 units, 12-bit, up to 16 external channels
• Communication Interfaces: 4x USART, 2x I²C, 2x SPI, 2x USB (Host/Device), 1x CAN
• GPIO Ports: Up to 51
• Operating Voltage (VDD): 2.4–3.6 V
• Operating Temperature: -40 to +85 °C

Features:

• Fast programmable interrupt controller + hardware interrupt stack
• Single cycle multiplication, hardware division, hardware FPU
• Built-in factory-trimmed 8MHz RC oscillator and 40 KHz RC oscillator
• Power on/down reset, programmable voltage detector
• 16-channels Touch-Key detection
• 1 16-bit advanced-control timer, 3 16-bit general-purpose timers, 1 32-bit general-purpose timer (CH32V203RBx)
• 2 watchdog timers (independent and window)
• CRC unit, 96-bit unique ID
• 2-wire serial debug interface (SDI)

Applications:

Package:

• TSSOP20
• QFN20
• QFN28
• QSOP28
• LQFP32
• LQFP48
• QFN48
• LQFP64M

Pin	Name	Type	Description
1	VBAT	P	VBAT
2	PC13-TAMPER-RTC(2)	I/O	PC13(3) (alt: TAMPER-RTC)
3	PC14-OSC32_IN(2)	I/O/A	PC14(3) (alt: OSC32_IN)
4	PC15-OSC32_OUT(2)	I/O/A	PC15(3) (alt: OSC32_OUT)
5	OSC_IN	I/A	OSC_IN
6	OSC_OUT	O/A	OSC_OUT
7	NRST	I	NRST
8	PC0	I/O/A	PC0 (alt: ADC_IN10)
9	PC1	I/O/A	PC1 (alt: ADC_IN11)
10	PC2	I/O/A	PC2 (alt: ADC_IN12)
11	PC3	I/O/A	PC3 (alt: ADC_IN13)
12	VSSA	P	VSSA
13	VDDA	P	VDDA
14	PA0-WKUP	I/O/A	PA0 (alt: WKUP, USART2_CTS, ADC_IN0, TIM2_CH1, TIM2_ETR, TIM5_CH1, TIM2_CH1_ETR_2)
15	PA1	I/O/A	PA1 (alt: USART2_RTS, ADC_IN1, TIM2_CH2, TIM5_CH2, TIM2_CH2_2)
16	PA2	I/O/A	PA2 (alt: USART2_TX, ADC_IN2, TIM2_CH3_1)
17	PA3	I/O/A	PA3 (alt: USART2_RX, ADC_IN3, TIM2_CH4, OPA1_OUT0, TIM5_CH4, TIM2_CH4_1)
18	VSS_4	P	VSS_4
19	VDD_IO_4	P	VDD_IO_4
20	PA4	I/O/A	PA4 (alt: SPI1_NSS, USART2_CK, ADC_IN4, OPA2_OUT1)
21	PA5	I/O/A	PA5 (alt: SPI1_SCK, ADC_IN5, OPA2_CH1N, USART1_CTS_2, USART1_CK_3)
22	PA6	I/O/A	PA6 (alt: SPI1_MISO, ADC_IN6, TIM3_CH1, OPA1_CH1N, TIM1_BKIN_1, USART1_TX_3)
23	PA7	I/O/A	PA7 (alt: SPI1_MOSI, ADC_IN7, TIM3_CH2, OPA2_CH1P, TIM1_CH1N_1, USART1_RX_3)
24	PC4	I/O/A	PC4 (alt: ADC_IN14, USART1_CTS_3)
25	PC5	I/O/A	PC5 (alt: ADC_IN15, USART1_RTS_3)
26	PB0	I/O/A	PB0 (alt: ADC_IN8, TIM3_CH3, OPA1_CH1P, TIM1_CH2N_1, TIM3_CH2_2, UART4_TX_1)
27	PB1	I/O/A	PB1 (alt: ADC_IN9, TIM3_CH4, OPA1_OUT1, TIM1_CH3N_1, TIM3_CH4_2, UART4_RX_1)
28	PB2(5)	I/O	PB2 (alt: BOOT1(5))
29	PB10	I/O/A	PB10 (alt: I2C2_SCL, USART3_TX, OPA2_CH0N, TIM2_CH3_2, TIM2_CH3_3)
30	PB11	I/O/A	PB11 (alt: I2C2_SDA, USART3_RX, OPA1_CH0N, TIM2_CH4_2, TIM2_CH4_3)
31	VSS_1	P	VSS_1
32	VDD_I/O_1	P	VDD_I/O_1
33	PB12	I/O/A	PB12 (alt: SPI2_NSS, I2C2_SMBA, USART3_CK, TIM1_BKIN)
34	PB13	I/O/A	PB13 (alt: SPI2_SCK, USART3_CTS, TIM1_CH1N, USART3_CTS_1)
35	PB14	I/O/A	PB14 (alt: SPI2_MISO, TIM1_CH2N, USART3_RTS, OPA2_CH0P, USART3_RTS_1)
36	PB15	I/O/A	PB15 (alt: SPI2_MOSI, TIM1_CH3N, OPA1_CH0P, USART1_TX_2)
37	PC6	I/O/A	PC6 (alt: ETH_RXP, TIM3_CH1_3)
38	PC7	I/O/A	PC7 (alt: ETH_RXN, TIM3_CH2_3)
39	PC8	I/O/A	PC8 (alt: ETH_TXP, TIM3_CH3_3)
40	PC9	I/O/A	PC9 (alt: ETH_TXN, TIM3_CH4_3)
41	PA8	I/O	PA8 (alt: USART1_CK, TIM1_CH1, MCO, USART1_CK_1, USART1_RX_2, TIM1_CH1_1)
42	PA9	I/O	PA9 (alt: USART1_TX, TIM1_CH2, USART1_RTS_2, TIM1_CH2_1)
43	PA10	I/O	PA10 (alt: USART1_RX, TIM1_CH3, USART1_CK_2, TIM1_CH3_1)
44	PA11	I/O/A	PA11 (alt: USART1_CTS, USBDM, CAN1_RX, TIM1_CH4, USART1_CTS_1, TIM1_CH4_1)
45	PA12	I/O/A	PA12 (alt: USART1_RTS, USBDP, CAN1_TX, TIM1_ETR, USART1_RTS_1, TIM1_ETR_1)
46	PA13	I/O	SWDIO (alt: PA13)
47	NC	-	NC
48	NC	-	NC
49	PA14	I/O	SWCLK (alt: PA14)
50	PA15	I/O	PA15 (alt: TIM2_CH1_ETR_1, TIM2_CH1_ETR_3)

Figure 4-1 Typical circuit for conventional power supply

Stresses at or above the absolute maximum ratings listed in the table below may cause permanent damage to the device.

Table 4-1 Absolute maximum ratings

Symbol	Description	Min.	Max.	Unit
T A	Ambient temperature during operation	-40	85	°C
T S	Ambient temperature during storage	-40	125	°C
V DD -V SS	External main supply voltage (includingV DDA and V DD )	-0.3	4.0	V
V I/O -V SS	I/O domain supply voltage	-0.3	4.0	V
V IN	Input voltage on the FT (5V tolerance) pin	V SS -0.3	5.5	V
V IN	Input voltage on other pins	V SS -0.3	V DD +0.3
\	△ V DD_x \		Variations between different main power supply pins
\	△ V I/O_x \		Variations between different I/O power supply pins
\	△ V SS_x \		Variations between different ground pins

33

V ESD(HBM)	Electrostatic discharge voltage (human body model, non-contact)	4K		V
V ESD(HBM)	USB pins (PA11, PA12)	3K		V
I VDD	Total current intoV DD /V DDA /V I/O power lines (source)		150	mA
I Vss	Total current out ofV SS ground lines (sink)		150	mA
I I/O	Sink current on any I/O and control pin		25	mA
I I/O	Output current on any I/O and control pin		-25	mA
I INJ(PIN)	Injected current on NRST pin		+/-5	mA
I INJ(PIN)	Injected current on HSE's OSC_IN pin and LSE's OSC_IN pin		+/-5	mA
I INJ(PIN)	Injected current on other pins		+/-5	mA
∑ I INJ(PIN)	Total injected current on all I/Os and control pins		+/-25	mA

MPN	Package	Temperature Range	Packing