Microchip Technology dsPIC33AK Digital Signal Controllers (DSCs)

Microchip Technology dsPIC33AK Digital Signal Controllers (DSCs) are designed for high-performance and real-time precision control applications. These DSCs combine the advantages of MCUs with the signal processing capabilities of digital signal processors (DSPs). The dsPIC33AK DSCs are suitable for a wide variety of applications that require quick control loop computations using multiple sensor inputs. These DSCs feature high performance, DP-FPU, enhanced pipelining, high-speed analog peripherals, and advanced peripherals. Typical applications include power factor correction (PFC), DC/DC converters, DC/AC, motor control, advanced sensor interfacing, high-performance embedded control, safety-critical designs, and digital lighting.

Functional Safety

The dsPIC33A DSCs offer a range of integrated hardware safety features. These DSCs also develop safety-critical applications to meet the ISO 26262 (ASIL B), IEC 61508 (SIL 2), and IEC 60730 (Class B) functional safety requirements. The hardware safety features include flash error-correcting code (ECC), RAM ECC, IO pin integrity monitors, clock monitoring, deadman timer (DMT), cyclic redundancy check (CRC), and watchdog timer (WDT).

Embedded Security

The dsPIC33A DSCs offer a range of scalable security features for implementing protection meas embedded applications. The hardware security features enable realizing secure use cases such as secure boot and secure firmware update, secure debug and disable entry into debug, and more.

Features

High-performance dsPIC33A DSP/CISC CPU
- 32-bit comprehensive instruction set for optimized speed and program code size:
  - 16-bit dsPIC33 core compatible
  - Non-paged linear data/flash 24-bit addressing space
  - 16-bit/32-bit instructions for optimized code size and performance
- 32-bit wide data paths
- Single and double precision floating-point unit (FPU) coprocessor
- Sixteen 32-bit working registers
- Dual 72-bit accumulators supporting 32-bit and 16-bit fixed-point DSP operations
- Eight-level deep working register, accumulator register, and floating point register contexts
Controller
- High-current sink/source capable I/Os
- Programmable weak pull-up and pull-down resistors
- programmable open-drain outputs
- Edge or level change notification interrupt on I/O pins
- Peripheral pin select (PPS) remappable pins to reduce board layout complexity
- Multiple interrupt vectors with individual programmable priority
- Five external interrupt pins
- Selectable oscillator options
  - 8MHz, 1% at 0ºC to 85ºC internal fast RC (FRC) oscillator
  - 8MHz, 2% internal backup FRC (BFRC) oscillator with 32kHz divided output
  - High-speed crystal resonator oscillator or external clock
- Two 1.6GHz PLLs for peripheral, which can be clocked from the FRC or a crystal oscillator
- Reference clock output (REFO)
- Low-power modes (sleep and idle)
- Power-on reset and brown-out reset

High-speed PWM
- Four PWM generators (four pairs and eight outputs)
- Up to 2.5ns PWM resolution
- PWM support for:
  - BLDC, PMSM, ACIM, SRM, and stepper motors
- Fault and current limit inputs
Other analog
- Three 5nS analog comparators with 12-bit pulse density modulation DACs:
  - Input multiplexing
  - Slope compensation
  - One DAC output buffer
- Three rail-to-rail 100MHz operational amplifiers with:
  - 100V/µS slew rate
  - 1mV offset (typical)
  - User calibration of input offset voltage
- Four 10µA constant sources + four programmable sources
Safety
- WDT
- DMT
- Four I/O integrity monitors (IOIM)
- Fail-safe clock monitor (FSCM) with automatic switchover to backup clock source with:
  - Programmable over-frequency/under-frequency thresholds
- Flash ECC (NVM ECC)
- RAM ECC
- RAM memory built-in self-test (MBIST)
- 32-bit CRC module
- Entire flash OTP by ICSP™ write inhibit
- Capless internal voltage regulator
- Virtual PPS pins for redundancy and monitoring
- Temperature sensor diode

Applications

PFC:
- Interleaved PFC
- Critical conduction PFC
- Bridgeless PFC
DC/DC converters:
- Buck, boost, forward, flyback, and push-pull
- Half/full-bridge
- Phase-shift full-bridge
- Resonant converters
DC/AC:
- Half/full-bridge inverter
- Resonant inverter