A34M420VL

The A34M420VL is a high-performance 32-bit microcontroller based on the Arm Cortex-M4F core, running up to 140 MHz with an integrated FPU and cache buffer for demanding control algorithms. It is tailored for motor-control and appliance applications, combining dual three-phase PWM generators, three independent 12-bit ADCs with 24 channels, and a broad set of peripherals for system integration.

Designed for embedded applications requiring precise motor feedback, deterministic timers and extensive peripheral connectivity, the A34M420VL delivers a balanced platform of compute, mixed-signal inputs, and on-chip memory to support sophisticated firmware and in-field updates.

Key Features

• Core & Performance  Arm® Cortex®-M4F core with FPU, up to 140 MHz operating frequency and 174 DMIPS; includes cache buffer (flash accelerator) support for improved code execution.
• Memory  Up to 1,024 KB dual-bank code Flash (512 KB + 512 KB) with bank swap and Read-While-Write (RWW), plus 32 KB data flash and up to 64 KB SRAM; ECC support for memory integrity.
• Motor Control PWM  Two independent MPWM generators, each providing 3-phase (U/V/W) outputs with 16-bit up/down counters and six ADC trigger sources—ideal for controlling two inverter motors.
• Analog & Data Conversion  Three high-speed 12-bit ADC blocks with a total of 24 analog input channels and selectable conversion modes (single, sequence, burst, multiple); adjustable sample and hold times.
• Timers & Control  Ten 16-bit timers with capture/output channels and two 32-bit free-run timers, plus a 32-bit watchdog timer and multiple timer operating modes (PWM, capture, periodic, one-shot).
• Connectivity  Multiple serial interfaces including 6× UART (16450-compatible), 3× SPI, and 2× I²C ports to connect sensors, drivers and host interfaces.
• System & Data Handling  16-channel DMA controller (8/16/32-bit transfers), CRC calculation unit with multiple CRC modes, and a 32-bit random number generator for system tasks.
• Clock & Power  Internal oscillators (HSI 32 MHz, LSI 500 kHz), external clock support (4–16 MHz main, 32.768 kHz LSE) and PLL frequency generator supporting operation to 140 MHz; low-power modes include SLEEP and DEEP-SLEEP.
• Package & Operating Range  Available in surface-mount LQFP packages (including 100-LQFP 14×14 mm 0.5 mm pitch); operating voltage range and temperature support accommodate embedded appliance environments.

Typical Applications

• Inverter Motor Controllers  Dual MPWM generators and multi-channel ADCs enable precise control and feedback for dual-inverter motor systems.
• Electric Pumps and Fans  High-speed processing, multiple timers and ADC inputs support speed control and sensor-based regulation for pumps and fans.
• Home Appliance Control  Integrated Flash, SRAM and rich peripheral set make the device suitable for appliance control tasks and display/interface management.

Unique Advantages

• Integrated Motor Control Peripherals  Two 3-phase PWM generators plus three 12-bit ADC blocks with 24 channels reduce external components and simplify motor-drive designs.
• Performance for Advanced Control  140 MHz Cortex-M4F with FPU and 174 DMIPS supports complex control algorithms and signal processing without external accelerators.
• Field Update Ready  Dual-bank code Flash with bank swap and Read-While-Write capability enables in-field firmware updates and safe OTA strategies.
• Deterministic Data Flow  16-channel DMA and multiple timers minimize CPU load and help maintain deterministic timing for real-time control loops.
• Robustness & Integrity  ECC for memories and CRC calculation hardware enhance data integrity for safety- and reliability-focused designs.
• Flexible Clocking & Low-Power Modes  Multiple internal/external oscillator options and sleep/deep-sleep modes allow designers to balance performance and power consumption.

Why Choose A34M420VL?

The A34M420VL positions itself as a compact, feature-rich microcontroller for embedded systems that demand real-time motor control, extensive analog acquisition and reliable in-field firmware management. Its combination of a Cortex-M4F core, dedicated motor-control peripherals, dual-bank Flash and comprehensive peripheral set supports designs that require both processing headroom and integrated control interfaces.

This device is well suited to engineers building inverter-driven motors, pumps, fans and appliance controllers who need a scalable platform with deterministic timers, high-resolution ADCs and robust memory features for long-term product maintenance and updates.

Request a quote or contact sales to discuss pricing, lead times and volume options for the A34M420VL.