SC667201MMG3 datasheet(19/120 Pages) FREESCALE

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MPC5642A Microcontroller Data Sheet, Rev. 3.1

Freescale Semiconductor

Introduction

1.5.16

Enhanced serial communications interface (eSCI)

Three eSCI modules provide asynchronous serial communications with peripheral devices and other MCUs, and include

support to interface to Local Interconnect Network (LIN) slave devices. Each eSCI block provides the following features:

•

Full-duplex operation

•

Standard mark/space non-return-to-zero (NRZ) format

•

13-bit baud rate selection

•

Programmable 8-bit or 9-bit data format

•

Programmable 12-bit or 13-bit data format for Timed Serial Bus (TSB) configuration to support the Microsecond bus

standard

•

Automatic parity generation

•

LIN support

— Compatible with LIN slaves from revisions 1.x and 2.0 of the LIN standard

— Autonomous transmission of entire frames

— Configurable to support all revisions of the LIN standard

— Automatic parity bit generation

— Double stop bit after bit error

— 10- or 13-bit break support

•

Separately enabled transmitter and receiver

•

Programmable transmitter output parity

•

2 receiver wake-up methods:

— Idle line wake-up

— Address mark wake-up

•

Interrupt-driven operation with flags

•

Receiver framing error detection

•

Hardware parity checking

•

1/16 bit-time noise detection

•

DMA support for both transmit and receive data

— Global error bit stored with receive data in system RAM to allow post processing of errors

1.5.17

Controller area network (FlexCAN)

The MPC5642A MCU includes three FlexCAN blocks. The FlexCAN module is a communication controller implementing the

CAN protocol according to Bosch Specification version 2.0B. The CAN protocol was designed to be used primarily as a vehicle

serial data bus, meeting the specific requirements of this field: real-time processing, reliable operation in the EMI environment

of a vehicle, cost-effectiveness and required bandwidth. Each FlexCAN module contains 64 message buffers.

The FlexCAN modules provide the following features:

•

Based on and including all existing features of the Freescale TouCAN module

•

Full Implementation of the CAN protocol specification, Version 2.0B

— Standard data and remote frames

— Extended data and remote frames

— Zero to eight bytes data length

— Programmable bit rate up to 1 Mbit/s

•

Content-related addressing

•

64 message buffers of 0 to 8 bytes data length

•

Individual Rx Mask Register per message buffer

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