SPC56EL54X datasheet(24/165 Pages) STMICROELECTRONICS

24 / 165 page

Introduction

SPC56ELx, SPC564Lx

24/165

DocID15457 Rev 12

1.5.25

System Status and Configuration Module (SSCM)

The SSCM on this device features the following:



System configuration and status



Debug port status and debug port enable



Multiple boot code starting locations out of reset through implementation of search for

valid Reset Configuration Half Word



Sets up the MMU to allow user boot code to execute as either Power Architecture code

(default) or as 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



32 message buffers of 0 to 8 bytes data length



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

and extended messages



Programmable loop-back mode supporting self-test operation



3 programmable mask registers



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



Time stamp based on 16-bit free-running timer



Global network time, synchronized by a specific message



Maskable interrupts



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



High immunity to EMI



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



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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