CM32M433R
CMIOT · CM32M4xxR Series
Overview
CM32M433R is a CMIOT-bit RISC-V MCU from 32, built on the Nuclei Nuclei N308 core (RV32IMACFP), with a maximum clock of 144 MHz, 144 KB of on-chip SRAM, and 512 KB KB of Flash. Typical active power is about 120 µA/MHz.
Core and memory
| Vendor | CMIOT（Chinese mainland） |
|---|---|
| IP brand / origin | Nuclei（Chinese mainland） |
| Core | Nuclei N308 |
| ISA / bit width | RV32IMACFP · 32 bit |
| Max clock | 144 MHz |
| SRAM | 144 KB |
| On-chip Flash | 512 KB |
| Cache | 8 KB |
Power and electrical
Conditions and notes: The vendor or source notes are in Chinese in the original RUN 120µA/MHz@144MHz；STOP2 9.5µA（RTC Run、16KB R-SRAM 保持）；Standby 2.9µA（备份寄存器+IO 保持）；STOP0 130µA 全 SRAM 保持
| Supply voltage | 1.8–3.6 V |
|---|---|
| Operating temperature | -40 ℃ ~ 105 ℃ |
Peripherals and interfaces
| UART / USART | 7 way |
|---|---|
| SPI | 3 way |
| I²C | 4 way |
| CAN / CAN FD | 2 way |
| I²S | 2 way |
| ISO 7816 | 1 way |
| Op-amp | 4 way |
| Comparator | 7 way |
| Touch | 24 way |
| DMA | 16 way |
| ADC | 40 channels · 12 bit |
| DAC | 2 channels |
| Other | The vendor or source notes are in Chinese in the original 7×U(S)ART（3×USART 含 ISO7816/IrDA）；3×SPI（2 路可配 I2S）+1×QSPI 144Mbps；高级/通用定时器多路 PWM；4×12bit 5Msps ADC；2×12bit 1Msps DAC；2×CAN 2.0B；2 个 8 通道 DMA；高级定时器 6.9ns 精度 |
Sources and notes
Confidence:High (official datasheet) · Last verified 2026-11-04
The vendor or source notes are in Chinese in the original 芯昇科技（中国移动）首款 RISC-V 低功耗大容量 MCU，40nm；512KB 加密 Flash（10 年保存/10 万次擦写）+ 144KB SRAM（含 16KB Retention）；国密 SM3/SM4 硬件加速 + 存储加密 + PMP/sPMP/MMU；ESD HBM 4kV。注意同厂 CM32M101A/CM32M10xA 是 ARM Cortex-M4（108MHz），非 RISC-V，故未收录。