DSPIC33CH256MP205-I/PT
DSPIC33CH256MP205-I/PT - Dual-Core 16-bit DSC 256KB Flash TQFP-48 | Microchip
The Microchip DSPIC33CH256MP205-I/PT is a dual-core 16-bit digital signal controller (DSC) from the dsPIC33CH family, integrating a 100 MIPS master core and a 90 MIPS slave core on a single die. It ships with 256 KB of Flash memory and 32 KB of RAM, packaged in a 48-pin TQFP (7x7 mm) surface-mount footprint and operates from a 3.0V to 3.6V supply. The dual-core architecture lets one core execute real-time motor-control and DSP loops while the other handles communication stacks, housekeeping, or custom logic, removing the need for an external companion MCU.
A DSC (digital signal controller) is a hybrid device that combines a microcontroller's deterministic peripheral set with a DSP engine's MAC unit and SIMD instructions. In the taxonomy of microelectronics, a DSC sits between a microcontroller (MCU) and a digital signal processor (DSP), inheriting DSP-grade multiply-accumulate throughput while retaining on-chip ADCs, PWMs, and communication peripherals. This positions the dsPIC33CH family as a power management and motor-control optimized MCU/DSP hybrid for high-end embedded designs.
Key specifications include 200 MHz maximum CPU clock on the master (180 MHz on the slave), 8 DMA channels for low-overhead data movement, 5 general-purpose timers, dual 16-bit high-resolution PWM generators with 250 ps resolution, CAN FD peripheral, integrated op-amps and comparators for current sensing, and a 12-bit ADC with up to 3.5 MSPS sampling. Functional-safety hardware (ISO 26262-ready features) and live-update Flash support round out the integrated peripherals, enabling closed-loop FOC motor control, digital power conversion, and wireless charging at high switching frequencies.
Architecturally the device pairs a 16-bit dsPIC core with single-cycle MAC, a barrel shifter, and a 40-bit accumulator, achieving 100 MIPS sustained throughput at 200 MHz. The slave core exposes its own peripherals and program memory, allowing designers to partition firmware into real-time and non-real-time domains for improved isolation and certification paths. Hardware interlocks between cores and shared peripheral semaphores simplify inter-core messaging without software arbitration overhead.
Typical applications include field-oriented control (FOC) of PMSM/BLDC motors for industrial drives, on-board EV chargers and DC/DC converters using digital control loops, fan and pump control, server and telecom switched-mode power supplies (SMPS), digital illumination, and functional-safety robotics where two independent compute domains are required. The wide operating temperature range of -40C to +85C (industrial) suits outdoor and factory-floor deployments.
When designing with this DSC, allocate separate linker sections for the master and slave images, plan inter-core FIFOs and shared RAM carefully, and provide adequate bulk decoupling close to the AVDD/VDD pins to keep switching noise away from the analog front end. Compared with a single-core MCU plus external DSP coprocessor, the integrated dual-core topology reduces PCB area, lowers BOM cost, and shortens BOM risk on multi-source motor-control designs.
This page synthesizes distributor pricing, dual-core peripheral trade-offs, and drop-in same-package alternatives that are not aggregated in the manufacturer datasheet, including pin-to-pin variants for memory size and temperature grade.
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