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32-bit Cortex®-M4F microcontroller with USB OTG, QSPI, CAN, rich interfaces, 216 MHz CPU

AT32F402 Series

AT32F402 series is based on ARM® Cortex®-M4 32-bit core operating at a frequency of up to 216 MHz. This device features a single-precision floating point unit (FPU), digital signal processor (DSP), up to 256 KB Flash memory and 96+6 KB SRAM (with parity check). It also embeds a 20 KB system memory with two functions: one that serves as a Bootloader, and another one that is one-time configurable as user instruction and data memory for achieving a maximum of 256 + 20 KB. In addition, the device offers 1x USB OTG controller(support Xtal-less in device mode), 1x QSPI, 1x CAN, 8x UARTs, 3x SPIs/I²Ss and 1x separate full-duplex I²S, 3x I²Cs, 1x 16-bit advanced timer, 7x 16-bit general-purpose timers, 1x 32-bit general-purpose timer, 2x 16-bit basic timers, 1x 12-bit 16-channel high-speed 2 Msps ADC. All I/Os have fast toggling capability and almost all of them are 5V tolerant. They can be used for a variety of purposes such as port remapping.

The device operates in the temperature range of -40 to 105oC. It can be supplied in various packages, including LQFP64, LQFP48, QFN48 and QFN32 to meet diverse demands. AT32F402 series is suited for gaming, industrial automation, USB accessory, IoT and consumer electronics.

Key Features

  • Performance
    • ARM® Cortex®-M4 MCU up to 216 MHz
    • Single precision floating-point unit (FPU)
    • DSP instructions
    • 2.4 to 3.6 V application supply
    • I/Os 5 V-tolerant
    • Temperature range -40 to + 105 °C
  • Memories
    • 256 KBytes of Flash memory
    • 102 KBytes of SRAM
    • sLib: configurable part of main Flash set as a library area with code executable but secured, non-readable
    • 1 x QSPIs, scalable Flash memory or RAM, address mapping support
  • Clock
    • PLL (216 MHz output)
    • External high-speed 4 to 25 MHz crystal
    • Internal high-speed 48 MHz RC oscillator (-40°C to 105°C)
    • Automatic clock calibration (ACC) (accuracy 1 % at TA = 25 °C, 2.5 % at TA= -40 to +105 °C)
    • Low speed external 32.768 kHz RTC crystal (LEXT)
    • Internal low-speed 40 kHz RC oscillator
  • Reset and supply management
    • Sleep, Deepsleep and Standby modes
    • Power-on/Low-voltage reset (POR/LVR)
    • Programmable voltage monitor (PVM)
    • 20 x 32-bit battery powered registers (BPR)
  • Analog peripherals
    • 1 x 12-bit 2 Msps A/D converter (up to 16 channels)
  • Timers
    • 1 x 16-bit 7-channel advanced timer
    • 1 x 32-bit and 7 x 16-bit general-purpose timers
    • 2 x 16-bit basic timers
    • 2 x watchdog timers (general WDT and windowed WWDT)
    • SysTick timer: a 24-bit downcounter
  • ERTC: enhanced RTC with alarm, subsecond accuracy and hardware calendar
  • Communication interfaces
    • 3 x I²C interfaces for SMBus/PMBus support
    • 3 x SPIs (36 Mbit/s), all with I²S interface multiplexed, any combination of two interfaces supports full-duplex
    • 1 x independent full-duplex I²S interface(I²SF)
    • Up to 6 x USARTs and 2 x UARTs (with ISO7816 interface, LIN，IrDA and modem control)
    • 1 x OTGFS interface (crystal-less in device mode)
    • CAN interface (2.0B Active)
    • Infrared transmitter (IRTMR)
  • DMA
    • 1 x 14-channel DMA controller supports timers, ADC, I²Ss, SPIs, I²Cs, and USARTs
  • Fast I/O ports
    • Up to 56 I/O ports, all mappable on 16 external interrupts and almost all 5 V-tolerant
    • All fast I/Os, control registers accessible with fᴀʜʙ speed
  • Packages
    • QFN32 4 x 4 mm
    • QFN48 6 x 6 mm
    • LQFP48 7 x 7 mm
    • LQFP64 7 x 7 mm
    • LQFP64 10 x 10 mm

ARM Cortex®-M4 AT32F402 Product Selector

Part Number AT32F402
xxU7-4		 AT32F402
xxU7		 AT32F402
xxT7		 AT32F402
xxT7-7		 AT32F402
xxT7
KB KC CB CC CB CC RB RC RB RC
Frequency (MHz) 216
Int.Flash (KB) 128 256 128 256 128 256 128 256 128 256
SRAM (KB) 64+6 96+6 64+6 96+6 64+6 96+6 64+6 96+6 64+6 96+6
QSPI 1 1 1 1 1
Timers Advanced 1 1 1 1 1
32-bit
general-purpose		 1 1 1 1 1
16-bit
general-purpose		 7 7 7 7 7
Basic 2 2 2 2 2
Systick 1 1 1 1 1
WDT 1 1 1 1 1
WWDT 1 1 1 1 1
ERTC 1 1 1 1 1
Communication
interfaces 		I²C 3 3 3 3 3
SPI 2(1) 3 3 3 3
I²S(half-duplex)(2)(3) 2(1) 3 3 3 3
I²F(full-duplex) 1 1 1 1 1
USART/UART 5/2(4) 5/2(4) 5/2(4) 6/2 6/2
CAN 1 1 1 1 1
OTGHS - - - - -
OTGFS 1 1 1 1 1
IRTMR 1 1 1 1 1
Analog 12-bit ADC
numbers/channels		 1 1 1 1 1
10 10 10 16 16
GPIO 28 40 40 56 56
Operating temperatures -40°C ~ 105°C
Packages QFN32
4x4 mm		 QFN48
6x6 mm		 LQFP48
7x7 mm		 LQFP64
7x7 mm		 LQFP64
10x10 mm

 

Note
  1. QFN32 package only supports SPI1/I²S1 and SPI3/I²S3.
  2. The half-duplex I²S and SPI are multiplexed.
  3. Any two half-duplex I²S interfaces can be combined into one full-duplex I²S by hardware.
  4. For LQFP48, QFN48 and QFN32 packages, UART8 is not available, and USART6 is used as UART for no CK pinout.

Resources

Product Select Guide

Cross Reference Table

Description Download Version Date
Cross reference table    AT32 MCU V202011 2020.11.03

Datasheet

Reference Manual

Evaluation Board

Component Library

BSP

Pack

Tool

USB Tool and Driver

Application Note

Tech Support

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