MCX A25 Enhanced Mainstream MCU Arm® Cortex® M33 with 180 MHz, Rich Serial Peripherals and Security

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The MCX A25 family of microcontrollers delivers high-performance embedded processing with support for speeds up to 180 MHz, 1 MB Flash and 256 kB RAM. Designed for PC accessories and motor control applications, these MCUs offer a rich set of serial peripherals including Full-Speed USB, I3C, FlexIO, SmartDMA and advanced security features.

For motor control, MCX A25 integrates 2x FlexPWM modules, each with 4 submodules, combined with AOI and up to 2x ADCs, enabling precise and efficient control.

Developers benefit from the MCUXpresso Developer Experience, which streamlines development, enhances productivity and accelerates time to market for embedded systems.

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MCX A255 A256

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Features

Core Platform

Arm® Cortex®-M33 180MHz

Processing Accelerators

SmartDMA, coprocessor for applications such as parallel camera interface and keypad scanning

Memory

Single-bank Flash: Up to 1024 kB Flash with ECC (supports one-bit correction and two-bit detection)
Cache Engine with 8 kB RAM
Up to 256 kB RAM of which 8 kB is shared with cache, configurable as up to 8 kB RAM with ECC (support one-bit correction and two-bit detection)
All RAM can be retained down to Deep Power-down mode
ROM

Peripherals

Analog

2x 16-bit ADC

Up to 3.2 Msps in 16-bit mode, and 4 Msps in 12-bit mode
Up to 43 ADC Input channels total (depending on the package)
Integrated temperature sensor

1 x 12-bit DAC

Up to 1 Msps

2 x High-speed Comparators with 8 input pins and 8-bit DAC as internal reference

1x LPCMP is functional down to Deep Power-down mode

1x OPAMP without PGA
Advanced Motor Control

Up to 2x FlexPWM each with 4 submodules, providing 16 complementary outputs of PWM (no Nanoedge module)
Up to 2x Quadrature Encoder/Decoder (eQDC)
2x AOI (AND/OR/Invert) module supports up to 4 output triggers

Timers

5 x 32-bit standard general-purpose asynchronous timers/counters, which support up to four capture inputs and four compare outputs, PWM mode and external count input. Specific timer events can be selected to generate DMA requests
Low power timerer
Frequency measurement timer
Windowed watchdog timer
Wake timer
Microtick timer (UTICK)
OS event timer
RTC timer without external 32 kHz input

Communication Interfaces for Connectivity

2x LPSPI, 4x LPI2C, 5x LPUART
1x I3C
USB Full-speed (Device/Host) with on-chip FS PHY
1x FlexCAN with FD
FlexIO

Security

EdgeLock Accelerator

PKC (Public Key Cryptography), supports ECC and RSA encryption and decryption
SGI (Secure Generic Interface), provides AES256, SHA-2 and key generation/derivation
Secure key store with key usage policies (protection of platform integrity, manufacturing and applications keys)

128-bit Universal unique identifier (UUID) per device in accordance with IETF's RFC4122 version5 specification
Device life cycle management
Flash read/write/execute permission protect by MBC and lockable
Implicit-protected Flash Region (IFR)
Security Monitoring