DSPIC33EP128GP502-I/MM
DSPIC33EP128GP502-I/MM - 16-bit DSC 70 MIPS 128KB Flash | Microchip
The Microchip DSPIC33EP128GP502-I/MM is a 16-bit Digital Signal Controller (DSC) delivering 70 MIPS at a 60 MHz core frequency, integrating 128 KB of Flash program memory and 16 KB of RAM in a 28-pin QFN-S (6x6 mm) package with an exposed thermal pad. The part supports industrial-grade -40C to +125C operation and is positioned at the mid-density node of Microchip's dsPIC33EP GP50 family, balancing compute density against package footprint.
A digital signal controller combines the deterministic interrupt response and rich peripheral set of a microcontroller with single-cycle multiply-accumulate (MAC) and barrel-shifter performance of a fixed-point DSP. Within the embedded hierarchy, the dsPIC33E core sits above general-purpose 8-bit MCUs and parallel to 32-bit Cortex-M4 microcontrollers, occupying a unique niche for real-time control loops where both DSP math (FFT, FIR, PID with high update rate) and deterministic GPIO/PWM/timer scheduling are required in a single device.
Key features include the high-speed 70 MIPS dsPIC33E core with single-cycle MAC and hardware divide, dual high-speed PWM modules suitable for digital power conversion (each with independent time base, duty cycle, and fault inputs), up to four on-chip op amps usable for current sensing or signal conditioning, a 10/12-bit ADC with sample-and-hold, ECAN 2.0B for industrial networking, plus I2C, SPI and UART peripherals. The Peripheral Trigger Generator (PTG) automates peripheral-to-peripheral sequencing, offloading the CPU from repetitive timing chores.
Architecturally, the device uses a modified Harvard 16-bit core with a 2-stage pipeline, hardware divide, and a deterministic interrupt controller. Multiple PGECx/PGEDx pairs support In-Circuit Serial Programming (ICSP) and JTAG-style debugging, and any pair may be used for debug as long as PGECx and PGEDx match. The 28-pin QFN-S package exposes up to 21 general-purpose I/O pins while reserving pads for power, ground, programming/debug, and analog references.
Typical applications include brushless DC and PMSM motor control FOC loops, digital switched-mode power supplies and LED drivers running at high PWM frequencies, sensor signal conditioning nodes in industrial CAN networks, and portable/medical devices requiring low-cost DSP math.
When laying out the PCB, place the 10uF VCAP decoupling capacitor on VDDCORE as close to pin 24 as possible and connect every VDD/VSS pair. Solder the exposed thermal pad to a continuous ground pour for thermal dissipation; budget flash and RAM headroom since 128 KB / 16 KB is the mid-tier density of the GP502 family.
This page synthesizes distributor pricing, drop-in family alternatives, pinout, and practical design notes not found in the manufacturer datasheet.
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