80 MHz 56800 core — where the DSP meets the MCU
The DSP56F802TA80E is a 16-bit hybrid controller built around the 56800 core — a DSP engine with an MCU control-flow overlay, running at 80 MHz. That clock rate sets the ceiling for the real-time control loop: a sensorless field-oriented current loop on a 10 kHz PWM carrier leaves about 8000 core cycles per interrupt for the observer and PI regulator, which is tight but workable with hand-optimised C or assembly. On-chip memory is 16 KB of flash (8K x 16) and 1K x 16 of RAM — enough for a single motor-control firmware image with a modest data buffer, but not for a communication stack or data-logging overlay. The flash is the program store; the RAM holds the state variables and lookup tables for the control algorithm.
Peripheral set for sensorless motor and power control
The integrated peripherals target exactly the signal chain of a sensorless motor drive: a PWM timer module for three-phase inverter gating, a 5-channel 12-bit ADC for phase current and DC-bus voltage sensing, and a SCI (UART) for commissioning or Modbus RTU pass-through. The POR and WDT handle brown-out and watchdog supervision without an external supervisor IC. The 32-LQFP package (7x7 mm body) keeps the PCB footprint small; the 0.8 mm pitch is routable on a two-layer board with careful trace spacing.
Active lifecycle — where is it in the cycle?
ROHS3 compliant — no exemption expiry to track for EU markets. The part is also REACH and conflict-minerals compliant per NXP's standard declaration, though those documents are not part of this listing.