APM32F403 Series

The APM32F403 series delivers high real-time performance, rich integration, low power consumption, and cost efficiency with excellent portability and scalability. It supports multiple interfaces, including U(S)ART, I²C, SPI, CAN, and USB OTG-FS, enabling versatile application development. The series is widely used in EV charging stations, BMS, encoders, barcode scanners, gaming peripherals, HVAC systems, smart appliances, receipt printers, medical devices, and smart security products. The series is certified for functional safety per IEC 60730/60335 standards.

Packaging Roadmap

Performance

System

  • Arm® Cortex®-M4F
  • Operating frequency:120 MHz
  • Supports FPU/DSP

Memory

  • Flash: 128 KB
  • SRAM: 32 KB

Power Management

  • Operating voltage: 2.0 V – 3.6 V
  • Supports POR/PDR
  • Supports PVD

I/Os

  • Up to 51 I/Os
  • All I/Os are mappable on external interrupt vectors

Communication Interfaces

  • I²C: 1
  • U(S)ART: 4
  • SPI: 2
  • CAN: 2
  • USB OTG-FS: 1

Analog Peripherals

  • 12-bit ADC: 2 (total 16 channels)

Timers

  • 16-bit advanced timers: 2
  • 16/32-bit general-purpose timers: 3/1
  • Watchdog timers: 2
  • 24-bit system timer: 1

Security

  • 96-bit unique device ID

Package

  • QFN36/48, LQFP48/64

Selection Tools

All Products

Core

Frequency(MHz)

FLASH(KB)

SRAM(KB)

FPU

I/Os

Voltage(V)

Package

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

SMC

DCI

DMC

Ethernet

RNG

AES/DES/ TDES

BN/ SM3/SM4

Compare
Part No.
Core
Frequency(MHz)
FLASH(KB)
SRAM(KB)
FPU
I/Os
Voltage(V)
Package
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
SMC
DCI
DMC
Ethernet
RNG
AES/DES/ TDES
BN/ SM3/SM4

Block Diagram

Documentation

Format Size
APM32F403xB Datasheet Data Sheet V1.0 pdf 2.04 MB August 29, 2025
APM32F403xB User Manual User Manual V1.0 pdf 5.27 MB August 29, 2025
APM32F403R Micro-EVB Schematic Diagram Development Board Schematic V1.0 pdf 128.59 KB October 17, 2025

Design Resources

Software Development Tools

Format Size
APM32F402_403_SDK SDKs V1.0.2 zip 31.37 MB July 17, 2025

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