Mainstream line, Cortex®-M4F 240MHz CPU, 256~1024KB Flash, 224KB SRAM, EMAC, 2CAN, 8UART, XMC, USB Microcontroller

AT32F407 series microcontrollers, based on 32-bit ARM® Cortex®-M4 core, utilize advanced process to achieve 240 MHz computing speed. The embedded single precision floating-point unit (FPU) and digital signal processor (DSP), various peripherals and flexible clock control mechanism can meet a wide range of applications. It also features up to 1 MB Flash memory, 224 KB SRAM and Flash access zero wait, far beyond the same level of chip industry.

In addition, AT32F407 series also imports the Security Library to support the use of passwords to protect the specified program area, in which IDH programs the core algorithm and provides to downstream customers for secondary development. Moreover, there are eight sets of UART serial interfaces, two sets of CAN buses and compatible IEEE-802.3 10/100 Mbps Ethernet port controllers available to suit for IoT applications. The USB device applications, without the need of external crystal oscillators, can reduce costs while enhancing the reliability of end products.

AT32F407 devices not only perform well in the temperature range of -40 to 105°C , but also offer a variety of chips for selection in response to diverse memory requirements. Through its powerful on-chip resource allocation, high integration and cost-effective performance, they are able to maintain its competitive edge in terms of design solutions with high computing demands.

Key Features

  • Performance
    • ARM® Cortex®-M4 with 240 MHz maximum frequency
    • Floating point unit (FPU)
    • Flash Memory access zero wait
    • 2.6 V to 3.6 V operating voltage
    • I/Os 5 V-tolerant
    • Operating temperature -40 to +105°C
  • Memories
    • 256 to 1024 KB of Flash instruction/data memory
    • Up to 96+128 KB of SRAM
    • sLib: configurable part of main Flash set as a library area with code executable but secured, non-readable
  • SPIM
    • Up to 16 MB of external SPI Flash memory extension (for both program execution and data storage) with encryption capability.
  • Clock
    • PLL (240 MHz output)
    • 4 to 25 MHz crystal oscillator
    • Internal 48 MHz factory-trimmed RC (-40°C to +105°C)
    • With automatic clock calibration (ACC) (accuracy 1 % at TA = 25 °C, 2.5 % at TA = -40 to +105 °C)
    • 32 kHz oscillator for RTC with calibration
    • Internal 40 kHz RC with calibration
  • Reset and supply management
    • Sleep, Deepsleep and Standby modes
    • Power-on/Low-voltage reset (POR/LVR)
    • PProgrammable voltage monitor (PVM)
    • Vʙᴀᴛ supply for RTC and 42 x 16-bit backup registers
  • Analog high-performance peripherals
    • 3x 12-bit, 0.5 μs A/D converters (up to 16 channels)
    • 2x 12-bit D/A converters
  • Timers
    • Up to 2 x 16-bit, motor control PWM advanced timers with dead-time generation
    • Up to 2 x 32-bit timers + 8x 16-bit timers
    • 2 x watchdog timers (Independent and Window)
    • 2 x 16-bit basic timers to drive the DAC
    • SysTick timer: a 24-bit downcounter
  • Peripheral interfaces
    • Up to 3 x I²C interfaces (SMBus/PMBus)
    • Up to 4 x SPIs (50 Mbit/s), all with I2S interface multiplexed, I2S2/I2S3 support full-duplex
    • 4 x USART + 4 x UART (ISO7816 interface, LIN, IrDA capability, modem control)
    • Up to 2 x SDIO interfaces
    • USB 2.0 full-speed interface supporting crystal-less
    • Up to 2 x CAN interfaces (2.0B Active)
    • 10/100M Ethernet MAC with dedicated DMA and SRAM (4 KB): IEEE1588 hardware support, MII/RMII available
  • DMA
    • 14 channels, support timers, ADCs, DACs, SDIOs, I²S, SPIs, I²Cs and USARTs
  • Up to 80 fast I/O
    • 51/80 multi-functional bi-directional I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant
    • All fast I/Os, control registers accessible with fAHB speed
  • XMC
    • Supports Compact Flash, SRAM, PSRAM, NOR and NAND memories
    • Supports LCD parallel interface, 8080/6800 modes
  • Packages
    • 64/100-pin LQFP

ARM Cortex®-M4F AT32F407 Product Selector

Part Number AT32F407xxT7
CPU frequency (MHz) 240
Int. Flash(1) ZW(KB)(2) 256 256 256 256 256 256
NZW(KB)(2) 0 256 768 0 256 768
Total (KB) 256 512 1024 256 512 1024
SRAM (KB)(2) 96+128
Timers Advanced-control 2 2
2 2
8 8
Basic 2 2
SysTick 1 1
WDT 1 1
WWDT 1 1
RTC 1 1
Communication I²C 3 3
SPI/I²S 4/4 (2 full-duplex) 4/4 (2 full-duplex)
USART+UART 4+4 4+4
SDIO 2 2
USB Device 1 1
CAN 2 2
Ethernet MAC 1 1
Analog 12-bit ADC
16 16
12-bit DAC
2 2
GPIO 51 80
XMC 1(3) 1
SPIM (4) 1 ch / up to 16 MB
Operating temperatures -40 to +105 °C
Packages LQFP64
10x10 mm
14x14 mm
  1. ZW = zero wait-state, up to SYSCLK 240 MHz
    NZW = non-zero wait-state
  2. The internal Flash and SRAM sizes are configurable with user’s option bytes. Take the AT32F407VGT7 as an example, on which the Flash/SRAM can be configured into two options below:
    - ZW: 256 KB, NZW: 768 KB, SRAM: 96 KB;
    - ZW: 128 KB, NZW: 896 KB, SRAM: 224 KB.
  3. For LQFP64 package, XMC only supports the LCD panel with 8-bit mode.
  4. SPIM = External SPI Flash memory extension (for both program execution and data storage) with encryption capability.


Product Select Guide

Download Description Version Date
     AT32 MCU(EXCEL)
AT32 MCU Product Select Guide V202401 2024.01.18

Cross Reference Table

Download Description Version Date
   AT32 MCU Cross reference table V202011 2020.11.03


Download Description Version Date
  AT32F407 AT32F407 Series pin definition, electrical characteristics and packaging information V2.04 2023.10.17

Reference Manual

Download Description Version Date
  AT32F407 A complete description of peripherals and registers for AT32F407 V2.05 2023.08.02

Evaluation Board

Download Description Version Date
  AT-START-F407 AT32F407 evaluation board supporting Arduino standard interfaces V1.3 2023.9.11


Download Description Version Date
  Firmware Library AT32F407 firmware library BSP user guide V2.1.7 2024.01.05



USB Tool and Driver

Application Note

Download Description Version Date
  Get started guide with
Get started guide with AT32F407 (development environment settings and FAQs) V2.0.3 2022.10.21
  AT32F407_Errata AT32F403A/407 device limitations V2.0.10 2023.08.03
  F407_sLib Complete information on the application principle of sLib and example code in AT32F407 V2.0.2 2022.4.13
  MG0009 Migrating from SXX32F107 to AT32F407 V2.0.1 2022.10.19

Tech Support

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