CH582M
WCH · CH582 Series
In production
32 bit · RV32IMAC
Low-power data
Max clock
20MHz
SRAM
32KB
On-chip Flash
448KB
Active current
—
Sleep current
0.7µA
Supply voltage
2.3–3.6V
Overview
CH582M is a WCH-bit RISC-V MCU from 32, built on the WCH in-house QingKe V4A core (RV32IMAC), with a maximum clock of 20 MHz, 32 KB of on-chip SRAM, and 448 KB KB of Flash.
Core and memory
| Vendor | WCH（Chinese mainland） |
|---|---|
| IP brand / origin | WCH in-house（Chinese mainland） |
| Core | QingKe V4A |
| ISA / bit width | RV32IMAC · 32 bit |
| Max clock | 20 MHz |
| SRAM | 32 KB |
| On-chip Flash | 448 KB |
Power and electrical
Active current
—
Sleep current
0.7 µA
Standby / shutdown
0.2 µA
Conditions and notes: The vendor or source notes are in Chinese in the original DS（CH583/CH582 共用）: 内置 DC-DC；Idle 1.6mA；Halt 320µA；Sleep 0.7~2.8µA（多档）; Shutdown 0.2~2.3µA（多档）。无按 MHz 归一化 Run 电流表。
| Supply voltage | 2.3–3.6 V |
|---|---|
| Operating temperature | -40 ℃ ~ 85 ℃ |
Peripherals and interfaces
| UART / USART | 4 way |
|---|---|
| SPI | 2 way |
| I²C | 1 way |
| USB Full-Speed | 2 way |
| BLE | 1 way |
| Touch | 14 way |
| ADC | 14 channels · 12 bit |
| Other | The vendor or source notes are in Chinese in the original BLE 5.0（2Mbps/1Mbps/500kbps/125kbps），RX -98dBm，TX +6dBm；2 组独立 USB2.0 FS；448K CodeFlash + 24K Boot + 32K DataFlash；14+1 通道 ADC |
Sources and notes
Confidence:High (official datasheet) · Last verified 2026-11-04
The vendor or source notes are in Chinese in the original 冲突：2021-05-08 官方新闻与 wch.cn 产品页均称 CH582/CH583 为 BLE5.3，但英文 DS 写 BLE 5.0（支持 2Mbps）; 本条目按 DS 记 5.0。CH582M=QFN48/40 GPIO；CH582F=QFN28/20 GPIO（8+1 ADC、8 TKey、仅 1 个 SPI 主机）。