CH32V203K8

Part: CH32V203C8T6 — WCH (Nanjing Qinheng Microelectronics)

Type: 32-bit RISC-V Microcontroller (QingKe V4B core)

Description: 144 MHz QingKe V4B RISC-V MCU with 64 KB zero-wait Flash (224 KB CodeFlash total), 20 KB SRAM, USB 2.0 FS host/device, CAN, 2× 12-bit ADC and 37 GPIOs in a 48-pin package.

Operating Conditions:

• Supply voltage: 2.4–3.6 V (VDD, VI/O, VDDA); rated 3.3 V
• Operating temperature: -40 to 85 °C (industrial grade)
• Max CPU clock: 144 MHz
• VBAT: 1.8–3.6 V

Absolute Maximum Ratings:

• Max supply voltage (VDD–VSS, including VDDA): 4.0 V
• Max I/O domain supply voltage (VI/O–VSS): 4.0 V
• Max input voltage on FT (5 V tolerant) pins: 5.5 V
• Max total current into VDD/VDDA/VI/O lines: 150 mA
• Max sink/output current on any I/O pin: 25 mA
• Max storage temperature: 125 °C
• ESD (HBM): 4 kV (USB pins PA11/PA12: 3 kV)

Key Specs:

• CPU: QingKe V4B (RV32IMAC), up to 144 MHz, zero-wait operation, hardware division and single-cycle multiply
• Memory: 64 KB zero-wait Flash run area (224 KB CodeFlash total), 20 KB SRAM, 28 KB BootLoader
• GPIO: 37 I/O ports with 16 external interrupts
• ADC: 2× 12-bit, analog input range VSSA–VDDA, 10 channels (shared with Touchkey)
• Communication: 4× USART, 2× SPI, 2× I2C, 1× CAN 2.0B, USB 2.0 FS device and host/device
• Timers: 1× 16-bit advanced-control, 3× 16-bit general-purpose, 2 watchdogs, 64-bit SysTick
• Analog: 2× OPA/comparator
• Low-power modes: Sleep, Stop, Standby; VBAT-powered RTC and backup registers

Features:

• Fast programmable interrupt controller with hardware interrupt stack
• Branch prediction and conflict handling
• Built-in 8 MHz and 40 kHz RC oscillators, PLL, external 3–25 MHz HSE and 32.768 kHz LSE
• Power-on/down reset and programmable voltage detector
• 8-channel DMA controller
• CRC unit and 96-bit unique ID
• 2-wire serial debug interface (SDI)
• 32-bit independent RTC

Applications:

• General-purpose industrial embedded control
• Motor control (complementary PWM with dead-time control)
• USB-connected devices

Package:

• LQFP48 (CH32V203C8T6, 48 pins)

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

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