CH571F
WCH · CH571 Series
In production
32 bit · RV32IMAC
Low-power data
Max clock
20MHz
SRAM
18KB
On-chip Flash
192KB
Active current
—
Sleep current
1.4µA
Supply voltage
2.3–3.6V
Overview
CH571F is a WCH-bit RISC-V MCU from 32, built on the WCH in-house QingKe V3A core (RV32IMAC), with a maximum clock of 20 MHz, 18 KB of on-chip SRAM, and 192 KB KB of Flash.
Core and memory
| Vendor | WCH（Chinese mainland） |
|---|---|
| IP brand / origin | WCH in-house（Chinese mainland） |
| Core | QingKe V3A |
| ISA / bit width | RV32IMAC · 32 bit |
| Max clock | 20 MHz |
| SRAM | 18 KB |
| On-chip Flash | 192 KB |
Power and electrical
Active current
—
Sleep current
1.4 µA
Standby / shutdown
0.3 µA
Conditions and notes: The vendor or source notes are in Chinese in the original DS V1.12（CH573/CH571 共用）: 内置 DC-DC，0dBm 发射 6mA；Idle 1.5mA；Halt 320µA；Sleep 1.4~6µA（多档）; Shutdown 0.3~1.3µA（多档）。无按 MHz 归一化的 Run 电流表。
| Supply voltage | 2.3–3.6 V |
|---|---|
| Operating temperature | -40 ℃ ~ 85 ℃ |
Peripherals and interfaces
| UART / USART | 2 way |
|---|---|
| SPI | 1 way |
| I²C | 1 way |
| USB Full-Speed | 1 way |
| BLE | 1 way |
| ADC | 6 channels · 12 bit |
| Other | The vendor or source notes are in Chinese in the original BLE 4.2，RX -96dBm，TX 可编程至 +5dBm；192K CodeFlash + 24K BootLoader + 32K DataFlash；USB 仅设备模式；ADC 不支持 DMA |
Sources and notes
Confidence:High (official datasheet) · Last verified 2026-11-04
The vendor or source notes are in Chinese in the original CH571 = CH573 精简版：无 USB Host、无 TouchKey、无 8-bit PWM、UART 2 个、FlashROM 仅 256KB、ADC 不支持 DMA。同系列 CH571D=QFN20/15 GPIO、CH571K=ESSOP10/4 GPIO。