A Comprehensive Guide To MC56F8145VFGE Microcontroller IC 16-Bit 40MHz 128KB (64K x 16) FLASH 128-LQFP (14x20)

56800E 56F8xxx Microcontroller IC 16-Bit 40MHz 128KB (64K x 16) FLASH 128-LQFP (14x20)

Device Description

The 56F8345 and 56F8145 are members of the 56800E core-based family of controllers. Each combines,

on a single chip, the processing power of a Digital Signal Processor (DSP) and the functionality of a

microcontroller with a flexible set of peripherals to create an extremely cost-effective solution. Because

of their low cost, configuration flexibility, and compact program code, the 56F8345 and 56F8145 are

well-suited for many applications. The devices include many peripherals that are especially useful for

motion control, smart appliances, steppers, encoders, tachometers, limit switches, power supply and

control, automotive control (56F8345 only), engine management, noise suppression, remote utility

metering, industrial control for power, lighting, and automation applications.

The 56800E 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 DSP and control code.

The instruction set is also highly efficient for C/C++ Compilers to enable rapid development of optimized

control applications.

The 56F8345 and 56F8145 support program execution from internal memories. Two data operands can be

accessed from the on-chip data RAM per instruction cycle. These devices also provide two external

dedicated interrupt lines and up to 49 General Purpose Input/Output (GPIO) lines, depending on peripheral

configuration.

56F8145 Features

The 56F8145 controller includes 128KB of Program Flash, programmable through the JTAG port, and

8KB of Data RAM. A total of 8KB of Boot Flash is incorporated for easy customer inclusion of

field-programmable software routines that can be used to program the main Program Flash memory area.

The Program Flash memory can be independently bulk erased or erased in pages; Program Flash page

erase size is 1KB. The Boot Flash page erase size is 512 bytes; Boot Flash memory can also be either bulk

or page erased.

A key application-specific feature of the 56F8145 is the inclusion of one Pulse Width Modulator (PWM)

module. This module incorporates three complementary, individually programmable PWM signal output

pairs and can also support six independent PWM functions to enhance motor control functionality.

Complementary operation permits programmable dead time insertion, distortion correction via current

sensing by software, and separate top and bottom output polarity control. The up-counter value is

programmable to support a continuously variable PWM frequency. Edge-aligned and center-aligned

synchronous pulse width control (0% to 100% modulation) is supported. The device is capable of

controlling most motor types: ACIM (AC Induction Motors); both BDC and BLDC (Brush and Brushless

DC motors); SRM and VRM (Switched and Variable Reluctance Motors); and stepper motors. The PWM

incorporates fault protection and cycle-by-cycle current limiting with sufficient output drive capability to

directly drive standard optoisolators. A “smoke-inhibit”, write-once protection feature for key parameters

is also included. A patented PWM waveform distortion correction circuit is also provided. The PWM is

double-buffered and includes interrupt controls to permit integral reload rates to be programmable from 1

to 16. The PWM module provides reference outputs to synchronize the Analog-to-Digital Converters

through two channels of Quad Timer C.

The 56F8145 incorporates a Quadrature Decoder capable of capturing all four transitions on the two-phase

inputs, permitting generation of a number proportional to actual position. Speed computation capabilities

accommodate both fast- and slow-moving shafts. An integrated watchdog timer in the Quadrature Decoder

can be programmed with a time-out value to alert when no shaft motion is detected. Each input is filtered

to ensure only true transitions are recorded.

This controller also provides a full set of standard programmable peripherals that include two Serial

Communications Interfaces (SCIs); two Serial Peripheral Interfaces (SPIs); and two Quad Timers. Any of

these interfaces can be used as General Purpose Input/Outputs (GPIOs) if that function is not required. An

internal interrupt controller is also a part of the 56F8145.