APM32F445/446 Series

The APM32F445/446 series are high-performance MCUs built on a 40nm process with an Arm® Cortex®-M4F core, delivering high performance, large on-chip memory, and robust security. They integrate CAN with CAN FD, LPUART, LPI2C, and 12-bit ADCs, operate over a temperature range of –40°C to +105°C, and comply with IEC 60730 and IEC 60335, making them well-suited for instrumentation, robotics, industrial control, and servo drive applications.

Packaging Roadmap

Performance

System

  • Arm® Cortex®-M4F core
  • Maximum frequency up to 112MHz
  • Supports single-precision FPU

Memory

  • Flash: 512KB/1MB
  • SRAM: 32KB/64KB/128KB
  • 64KB Data Flash with ECC
  • 4KB CFGNVM configurable as SRAM or EEPROM

Power Management

  • VDD range: 2.7V to 5.5V
  • VDDA range: 2.7V to 5.5V
  • Supports POR/LVR
  • Supports LVD

Timers

  • 16-bit general-purpose timers: 4/6
  • 16-bit low-power timer: 1
  • 32-bit timer: 1
  • Programmable delay units (PDU): 2
  • Watchdog timers: 2
  • RTC: 1

I/Os

  • Up to 89 I/Os
  • All I/Os are mapped to external interrupt vectors

Analog Peripherals

  • 12-bit ADCs: 2, external channels: 16+13/16+16
  • Comparator with integrated 8-bit DAC
  • Programmable delay units (PDU): 2

Peripheral Interfaces

  • LPUART: 3
  • LPI2C: 1
  • LPSPI: 3
  • CAN: 3 (all support CAN FD)

Debug Interfaces

  • SWJ-DP
  • DWT
  • ITM
  • TPIU
  • FPB

Security and Safety

  • Cryptographic Services Engine (CSEc)
  • 128-bit unique device ID
  • CRC calculation unit
  • Internal watchdog timer (WDT)
  • External watchdog monitor (EWDT)
  • Memory Protection Unit (MPU)
  • ECC protection for Flash and SRAM

Package

  • LQFP48/64/100

Selection Tools

All Products

Core

Frequency(MHz)

FLASH(KB)

SRAM(KB)

FPU

I/Os

Voltage(V)

GPTMR(16bit)

GPTMR(32bit)

Advanced TMR(16bit)

Basic TMR

Systick(24bit)

IWDT

WWDT

RTC

ADC 12-bit Cell

ADC 12-bit Channels

DAC 12-bit Cell

DAC 12-bit Channels

Analog Comparator

TSC (Channels)

SPI

QSPI

I2S

I2C

U(S)ART

CAN

SDIO

USB Device

CEC

USB OTG_FS

USB OTG_HS

DCI

SMC

DMC

Ethernet

RNG

AES/DES/ TDES

BN/ SM3/SM4

Package

FTMR(16bit)

LPTMR(16bit)

LPITMR(32bit)

WDT

EWDT

PDU

LPSPI

LPI2C

LPUART

SAI

Compare
Part No.
Core
Frequency(MHz)
FLASH(KB)
SRAM(KB)
FPU
I/Os
Voltage(V)
GPTMR(16bit)
GPTMR(32bit)
Advanced TMR(16bit)
Basic TMR
Systick(24bit)
IWDT
WWDT
RTC
ADC 12-bit Cell
ADC 12-bit Channels
DAC 12-bit Cell
DAC 12-bit Channels
Analog Comparator
TSC (Channels)
SPI
QSPI
I2S
I2C
U(S)ART
CAN
SDIO
USB Device
CEC
USB OTG_FS
USB OTG_HS
DCI
SMC
DMC
Ethernet
RNG
AES/DES/ TDES
BN/ SM3/SM4
Package
FTMR(16bit)
LPTMR(16bit)
LPITMR(32bit)
WDT
EWDT
PDU
LPSPI
LPI2C
LPUART
SAI

Block Diagram

Documentation

Format Size
APM32F446 Datasheet Data Sheet V1.1 pdf 3.2 MB January 13, 2026
APM32F445 Datasheet Data Sheet V1.1 pdf 3.48 MB January 13, 2026
AN1080_APM32_APM32 Series Tool Chain User Manual Application Note V1.1 pdf 1.21 MB October 28, 2022
AN1090_APM32_TSC Touch Module Application Note V1.0 pdf 1.51 MB April 19, 2023
AN1093_APM32_Eclipse Development Tutorial under APM32 Arm MCU Windows System Application Note V1.0 pdf 3.15 MB July 13, 2023
AN1095_APM32_USB Device Library Application Note Application Note V1.0 pdf 1.15 MB August 30, 2023

Design Resources

Software Development Tools

Format Size
APM32F445_446_SDK SDK V1.0.0 zip 20.78 MB February 27, 2026
APM32F445_446_DFP Pack Pack V1.0.0 pack 1.83 MB February 27, 2026
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