PIC24EP128MC202T-I/SS - 16-bit 70MIPS Motor MCU 128KB | Microchip

The Microchip Technology PIC24EP128MC202T-I/SS is a high-performance 16-bit microcontroller from the PIC24EP Motor Control family, featuring 128KB of Flash program memory and 16KB of SRAM, and packaged in a 28-pin SSOP (0.209 inch, 5.30mm width). It executes up to 70 MIPS at 70 MHz and operates from a 3.0V to 3.6V supply. The 'T' suffix indicates tape-and-reel packaging and the 'I' grade denotes an industrial operating temperature range of -40C to +85C.

A 16-bit microcontroller (MCU) is a single-chip computer that integrates a 16-bit CPU core, program memory, data RAM, and peripherals such as timers, ADCs, communication interfaces, and PWM modules. The PIC24EP family belongs to the broader dsPIC33 / PIC24E lineage of Microchip's high-performance 16-bit controllers, sitting architecturally between 8-bit PIC16/PIC18 MCUs and 32-bit ARM Cortex-M devices. This hierarchy makes the PIC24EP128MC202 ideal for demanding real-time control tasks that exceed 8-bit capability but do not justify the cost or power of a 32-bit MCU.

Key features include three 16-bit timers, up to six PWM channels with high-speed PWM (up to 1 ns PWM resolution), a 10/12-bit ADC with up to 1.1 Msps conversion rate, four op amps and three comparators optimized for current/voltage sensing, plus communication peripherals including UART, SPI, I2C, and ECAN. The integrated motor-control PWM module supports complementary outputs with programmable dead time, making the device particularly well-suited to driving three-phase motor inverter stages.

The device uses a 5-stage pipeline modified Harvard architecture with a 16-bit data path and 24-bit instruction width, providing high code density and deterministic interrupt response. An on-chip 8 MHz internal oscillator with PLL supports system clock scaling up to 70 MIPS without an external crystal, reducing BOM cost. The peripheral trigger generator (PTG) and DMA controller offload CPU overhead for high-speed data movement.

Typical applications include brushless DC (BLDC) motor control, permanent magnet synchronous motor (PMSM) field-oriented control (FOC), industrial servo drives, low-power fan/pump controllers, and home appliances with sensorless or sensored motor feedback. The integrated op amps and comparators allow direct current-shunt monitoring and back-EMF sensing without external analog components.

When designing with the PIC24EP128MC202T-I/SS, note that the SSOP-28 footprint has limited thermal dissipation, so high-current PWM outputs should drive gate-driver ICs rather than power switches directly. The MPLAB X IDE with the MPLAB XC16 compiler and the MPLAB Code Configurator (MCC) plugin is the recommended toolchain for peripheral setup and motor-control application development.

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