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Automotive line, Cortex®-M4F 150MHz CPU, 256KB Flash, 48KB SRAM, 5.33Msps ADC, 2DAC, 2CAN, OTGFS, XMC Microcontroller

AT32A423 Series

AT32A423 (A: Automotive) series is based on ARM® Cortex®-M4F 32-bit core operating at a frequency of up to 150 MHz. This device features a single-precision floating point unit (FPU), digital signal processor (DSP), up to 256 KB Flash memory and 48 KB SRAM. 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. It incorporates XMC interface (for PSRAM and NOR extension, or 8080/6800 mode parallel LCD), 1x OTG controller (support Xtal-less in device mode), 2x CANs, 8x USARTs, 3x SPIs/I²Ss (full-duplex support), 3x I²Cs, 1x 16-bit advanced timer, 8x 16-bit general-purpose timers, 1x 32-bit general- purpose timer, 2x 16-bit basic timers, 1x 12-bit 24-channel high-speed 5.33 Msps ADC and 2x 12-bit DACs. 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.

AT32A423 operates in the temperature range of -40℃~105℃, and is highly adaptable to complex working environments. It has successfully passed AEC-Q100 qualification and complies with automotive grade reliability test standards. To meet diverse memory demands, AT32A423 provides a rich choice of package types. With powerful on-chip resources, higher integration, and cost-effectiveness, the AT32A423 series offers robust solutions for various automotive scenarios. It can be widely used in vehicle scenarios such as driving recorders, in-car audio and video, ADAS, 360 panoramic views, car central control, kick tailgate control, charging piles, etc.

Key Features

  • Performance
    • ARM® Cortex®-M4 with 150 MHz maximum frequency
    • Single precision floating-point unit (FPU)
    • DSP instructions
    • 2.4 V to 3.6 V operating voltage
    • I/Os 5V tolerant
    • Operating temperature -40 to +105°C
  • Memories
    • up to 256 KB of Flash memory
    • up to 48 KB of SRAM
    • sLib: configurable part of main Flash set as a library area with code executable but secured, non-readable
  • Clock
    • PLL (150 MHz output)
    • 4 to 25 MHz crystal oscillator
    • Internal 48 MHz factory-trimmed RC (accuracy ±1 % at TA = 25 °C, ±2.5 % at TA= -40 to +105°C), with automatic clock calibration (ACC).
    • 32 kHz oscillator for RTC with calibration
    • Internal 40 kHz RC with calibration
  • Reset and supply management
    • Sleep, Deepsleep and Standby modes
    • Power-on reset (POR) / Low-voltage reset (LVR)
    • Power voltage monitoring (PVM)
    • Supports 20 x 32-bit battery powered registers
  • Analog high-performance peripherals
    • 1 x 12-bit, 5.33Msps A/D converters (up to 24 channels)
  • DMA
    • 14 channels, support timers, ADC, DAC, I2S, SPI, I2C, CAN, OTG and USART
  • Fast I/O ports
    • Up to 87 I/Os, all mappable on external interrupt vectors and almost all 5V-tolerant
    • All fast I/Os, control registers accessible with fᴀʜʙ speed
  • Timers
    • 1 x 16-bit 7-channel motor control PWM advanced timer with dead-time generator and emergency break
    • Up to 8x 16-bit + 1x 32-bit general-purpose timers, each timer up to 4 channels used for input capture/output compare/PWM or pulse counting and incremental encoder input
    • 2 x 16-bit basic timer
    • 2 x watchdog timers (WDT and WWDT)
    • Systick timer: a 24-bit downcounter
  • ERTC: enhanced RTC with alarm, subsecond accuracy and hardware calendar
  • Peripheral interfaces
    • 3 x I2C interfaces (SMBus/PMBus)
    • 3 x SPIs/I2S
    • 8 x USART (ISO7816 interface, LIN, IrDA capability, modem control)
    • 2 x CAN
    • 1 x OTGFS
    • Infrared transmitter
  • Packages
    • LQFP100 14 x 14 mm
    • LQFP64 10 x 10 mm
    • LQFP64 7 x 7 mm
    • LQFP48 7 x 7 mm
    • QFN48 6 x 6 mm
    • QFN36 6 x 6 mm
    • QFN32 4 x 4 mm

ARM Cortex®-M4F AT32A423 Product Selector

Part Number AT32A423
xxU7-4		 AT32A423
xxU7		 AT32A423
xxU7		 AT32A423
xxT7		 AT32A423
xxT7-7		 AT32A423
xxT7		 AT32A423
xxT7
KC KB K8 TC TB T8 CC CB C8 CC CB C8 RC RB R8 RC RB R8 VC VB V8
CPU frequency（MHz） 150
Flash（KB） 256 128 64 256 128 64 256 128 64 256 128 64 256 128 64 256 128 64 256 128 64
SRAM (KB) 48 48 32 48 48 32 48 48 32 48 48 32 48 48 32 48 48 32 48 48 32
XMC - - - - 1(1) 1(1) 1
Timers Advanced 1 1 1 1 1 1 1
32-bit general-purpose 1 1 1 1 1 1 1
16-bit general-purpose 8 8 8 8 8 8 8
Basic 2 2 2 2 2 2 2
Systick 1 1 1 1 1 1 1
WDT 1 1 1 1 1 1 1
WWDT 1 1 1 1 1 1 1
ERTC 1 1 1 1 1 1 1
Communication I2C 3 3 3 3 3 3 3
SPI(2) 3 3 3 3 3 3 3
I2S (Half duplex)(2)(3) 3 3 3 3 3 3 3
USART+UART 4+3(4) 4+3(4) 4+3(4) 4+3(4) 5+3(5) 5+3(5) 8+0
CAN 2 2 2 2 2 2 2
OTGFS 1 1 1 1 1 1 1
Infrared transmitter 1 1 1 1 1 1 1
Analog 12-bit ADC
numbers/channels		 1 1 1 1 1 1 1
11 11 17 17 23 23 24
12-bit DAC
numbers/channels		 2 2 2 2 2 2 2
GPIO 27 29 39 39 53 53 87
Operating temperatures -40°C ~ 105°C
Packages QFN32
4x4 mm		 QFN36
6x6 mm		 QFN48
6x6 mm		 LQFP48
7x7 mm		 LQFP64
7x7 mm		 LQFP64
10x10 mm		 LQFP100
14x14 mm

 

Note
  1. For LQFP64 package, XMC only supports the 8-bit mode LCD panel.
  2. Half-duplex multiplexed I2S and SPI.
  3. Two half-duplex I2S can be configured by hardware to achieve full-duplex I2S function.
  4. For 48-pin packages and smaller, USART8 is not available, and USART5/6/7 can only be used as UART for no CK pinout.
  5. For 64-pin packages, USART5/7/8 can only be 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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