MPC5643L datasheet(15/136 Pages) FREESCALE

15 / 136 page

Introduction

MPC5643L Microcontroller Data Sheet, Rev. 8.1

Freescale Semiconductor

•

Sets up the MMU to allow user boot code to execute as either Power Architecture code (default) or as Freescale VLE

code out of flash memory

•

Triggering of device self-tests during reset phase of device boot

1.5.26

FlexCAN

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.

The FlexCAN module provides the following features:

•

Full implementation of the CAN protocol specification, version 2.0B

— Standard data and remote frames

— Extended data and remote frames

— 0 to 8 bytes data length

— Programmable bit rate as fast as 1Mbit/s

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32 message buffers of 0 to 8 bytes data length

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Each message buffer configurable as receive or transmit buffer, all supporting standard and extended messages

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Programmable loop-back mode supporting self-test operation

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3 programmable mask registers

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Programmable transmit-first scheme: lowest ID or lowest buffer number

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Time stamp based on 16-bit free-running timer

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Global network time, synchronized by a specific message

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Maskable interrupts

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Independent of the transmission medium (an external transceiver is assumed)

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High immunity to EMI

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Short latency time due to an arbitration scheme for high-priority messages

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Transmit features

— Supports configuration of multiple mailboxes to form message queues of scalable depth

— Arbitration scheme according to message ID or message buffer number

— Internal arbitration to guarantee no inner or outer priority inversion

— Transmit abort procedure and notification

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Receive features

— Individual programmable filters for each mailbox

— 8 mailboxes configurable as a 6-entry receive FIFO

— 8 programmable acceptance filters for receive FIFO

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Programmable clock source

— System clock

— Direct oscillator clock to avoid FMPLL jitter

1.5.27

FlexRay

The FlexRay module provides the following features:

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Full implementation of FlexRay Protocol Specification 2.1 Rev. A

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64 configurable message buffers can be handled

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Dual channel or single channel mode of operation, each as fast as 10 Mbit/s data rate

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