56F803 Description
The 56F803 is a member of the 56800 core-based family of processors. It combines, on a single chip, the processing power of a DSP and the functionality of a microcontroller with a flexible set of peripherals to create an extremely cost-effective solution. Because of its low cost, configuration flexibility, and compact program code, the 56F803 is well-suited for many applications. The 56F803 includes many peripherals that are especially useful for applications such as motion control, smart appliances, steppers, encoders, tachometers, limit switches, power supply and control, automotive control, engine management, noise suppression, remote utility metering, and industrial control for power, lighting, and automation.
The 56800 core is based on a Harvard-style architecture consisting of three execution units operating in parallel, allowing as many as six operations per instruction cycle. The MCU-style programming model and optimized instruction set allow straightforward generation of efficient, compact device and control code. The instruction set is also highly efficient for C compilers to enable rapid development of optimized control applications.

56F803 General Description
• Up to 40 MIPS at 80MHz core frequency
• DSP and MCU functionality in a unified, C-efficient architecture
• Hardware DO and REP loops
• MCU-friendly instruction set supports both DSP and controller functions: MAC, bit manipulation unit, 14 addressing modes
• 31.5K × 16-bit words (64KB) Program Flash
• 512 × 16-bit words (1KB) Program RAM
• 4K × 16-bit words (8KB) Data Flash
• 2K × 16-bit words (4KB) Data RAM
• 2K × 16-bit words (4KB) Boot Flash
• Up to 64K × 16-bit words each of external Program and Data memory
• 6-channel PWM module
• Two 4-channel 12-bit ADCs
• Quadrature Decoder
• CAN 2.0 B module
• Serial Communication Interface (SCI)
• Serial Peripheral Interface (SPI)
• Up to two General Purpose Quad Timers
• JTAG/OnCETM port for debugging
• 16 shared GPIO lines
• 100–pin LQFP package

56F803 Features
Processing Core
• Efficient 16-bit 56800 family controller engine with dual Harvard architecture
• As many as 40 Million Instructions Per Second (MIPS) at 80MHz core frequency
• Single-cycle 16 × 16-bit parallel Multiplier-Accumulator (MAC)
• Two 36-bit accumulators, including extension bits
• 16-bit bidirectional barrel shifter
• Parallel instruction set with unique processor addressing modes
• Hardware DO and REP loops
• Three internal address buses and one external address bus
• Four internal data buses and one external data bus
• Instruction set supports both DSP and controller functions
• Controller style addressing modes and instructions for compact code
• Efficient C compiler and local variable support
• Software subroutine and interrupt stack with depth limited only by memory
• JTAG/OnCE debug programming interface

Memory
• Harvard architecture permits as many as three simultaneous accesses to Program and Data memory
• On-chip memory including a low-cost, high-volume Flash solution
   — 31.5K × 16-bit words of Program Flash
   — 512K × 16-bit words of Program RAM
   — 4K × 16-bit words of Data Flash
   — 2K × 16-bit words of Data RAM
   — 2K × 16-bit words of Boot Flash
• Off-chip memory expansion capabilities programmable for 0, 4, 8, or 12 wait states
   — As much as 64K × 16 bits of Data memory
   — As much as 64K × 16 bits of Program memory

Peripheral Circuits for 56F803
• Pulse Width Modulator module (PWM) with six PWM outputs, three Current Sense inputs, and three Fault inputs, fault-tolerant design with dead time insertion, supports both center- and edge- aligned modes, supports Freescale’s patented dead time distortion correction
• Two 12-bit Analog-to-Digital Converters (ADCs), which support two simultaneous conversions; ADC and PWM modules can be synchronized
• Quadrature Decoder with four inputs (shares pins with Quad Timer)
• Four General Purpose Quad Timers: Timer A (sharing pins with Quad Dec0), Timers B &C without external pins and Timer D with two pins
• CAN 2.0 B module with 2-pin ports for transmit and receive
• Serial Communication Interface (SCI) with two pins (or two additional GPIO lines)
• Serial Peripheral Interface (SPI) with configurable 4-pin port (or four additional GPIO lines)
• Computer Operating Properly (COP) Watchdog timer
• Two dedicated external interrupt pins
• Sixteen multiplexed General Purpose I/O (GPIO) pins
• External reset input pin for hardware reset
• JTAG/On-Chip Emulation (OnCE™) for unobtrusive, processor speed-independent debugging
• Software-programmable, Phase Locked Loop-based frequency synthesizer for the controller core clock

Energy Information
• Fabricated in high-density CMOS with 5V-tolerant, TTL-compatible digital inputs
• Uses a single 3.3V power supply
• On-chip regulators for digital and analog circuitry to lower cost and reduce noise
• Wait and Stop modes available