A34M456VL2N

The A34M456VL2N is a 32-bit microcontroller built around an Arm Cortex-M4 core with floating-point unit, delivering up to 140 MHz operation (175 DMIPS). It combines performance and integration—Flash, data Flash, SRAM, high-speed ADC, motor/PFC PWM engines and multi-channel peripherals—targeted for motor control, PFC and appliance control applications.

Designed for embedded designs requiring deterministic compute, multi-channel analog capture and dedicated motor/PFC functions, the device operates from 2.7 V to 5.5 V and across an ambient range of -40 °C to +105 °C, and is available in a 100-pin LQFP package.

Key Features

• Core and Performance  The Arm Cortex-M4 CPU with FPU runs up to 140 MHz (175 DMIPS) and includes a cache buffer (Flash accelerator) to improve code fetch efficiency.
• Flash and Memory  Up to 256 KB of code Flash (28 MHz Flash access speed), 32 KB of data Flash and up to 32 KB of SRAM with Error Correction Code (ECC) support for improved data integrity.
• Power and Clock Management  Multiple clock sources including an 8 MHz high-speed internal (HSI, ±1.0%), 500 kHz low-speed internal (LSI), external main oscillator (4–16 MHz), external 32.768 kHz sub-oscillator and a PLL capable of generating the system 140 MHz clock.
• Timers, PWM and Motor Control  Two MPWM generators with six-phase outputs (U, V, W), 16-bit up/up-down counters, eight ADC trigger sources and support for variable and fixed triggers. Dedicated PFC control unit with two PFC PWM outputs and multiple PFC modes including complementary mode with deadtime support.
• ADC and Analog  Three independent 12-bit ADC blocks supporting up to 2.0 Msps and 22 analog input channels, adjustable sample and hold times, and multiple conversion modes. Two 10-bit DAC units and four comparators (propagation delay <150 ns) enable analog control and reference functions.
• Peripherals and Connectivity  Rich serial interfaces including UART (6 units), SPI (2 units) and I2C (2 units), plus up to 88 general-purpose I/O pins with interrupt capability and flexible pin multiplexing.
• DMA, CRC and System Support  8-channel DMA controller with 8/16/32-bit transfers and broad peripheral compatibility. Hardware CRC unit supporting CRC32/CRC16/CRC8/CRC7 with byte reversal and DMA compatibility. Serial Wire Debug (SWD) for development.
• Timers and Watchdog  Ten 16-bit timers and two 32-bit free-run timers, plus a 32-bit watchdog timer with selectable prescalers for system monitoring and timed operations.
• Operating Range and Package  Operates from 2.7 V to 5.5 V over an ambient range of -40 °C to +105 °C. Available in a 100-pin LQFP (14 × 14 × 0.5T–1.6 mm).

Typical Applications

• Inverter Motor Controllers  Real-time control of three-phase motors using the dual MPWM generators, dedicated ADC triggers and high-speed ADC channels for precise current and voltage sensing.
• Power Factor Correction (PFC)  Single and interleaved PFC implementations using the integrated PFC control unit, complementary PWM modes and ADC-triggered control loops.
• Home Appliance Drives  Compressor, fan and HVAC motor control leveraging the MCU's PWM, ADC and timer resources for efficient and responsive drive control.

Unique Advantages

• High computational throughput  Cortex-M4 with FPU at up to 140 MHz (175 DMIPS) supports control algorithms and signal processing workloads.
• Integrated motor and PFC peripherals  MPWM generators and a dedicated PFC unit reduce external components and simplify power-control firmware design.
• Fast, multi-channel analog capture  Three ADC blocks with up to 2.0 Msps and 22 channels enable dense sensor and current/voltage monitoring for closed-loop control.
• Robust memory architecture  256 KB code Flash, 32 KB data Flash, 32 KB SRAM and ECC support increase design reliability and firmware space for complex applications.
• Flexible system integration  Extensive timers, DMA, CRC and up to 88 GPIOs provide deterministic data movement and peripheral interfacing for complex embedded systems.
• Wide operating range  2.7–5.5 V operation and −40 °C to +105 °C ambient support demanding industrial and appliance environments.

Why Choose A34M456VL2N?

The A34M456VL2N positions itself as a high-performance, highly integrated microcontroller tailored for motor control, PFC and appliance drive systems. With a Cortex-M4F core, dedicated PWM/PFC hardware, high-speed multi-block ADCs and a comprehensive peripheral set, it enables compact BOMs and deterministic control loops for embedded power and motor applications.

Engineers designing inverter drives, compressors, fans and similar systems will find the combination of processing power, analog throughput and system-level peripherals useful for implementing advanced control algorithms while maintaining reliability across a wide voltage and temperature range.

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