SPC564L54L5 datasheet(29/160 Pages) STMICROELECTRONICS

29 / 160 page

SPC56XL60/54

Introduction

Doc ID 15457 Rev 8

29/160

The CTU implements the following features:

●

Cross triggering between ADC, FlexPWM, eTimer, and external pins

●

Double buffered trigger generation unit with as many as 8 independent triggers

generated from external triggers

●

Maximum operating frequency less than or equal to 120 MHz

●

Trigger generation unit configurable in sequential mode or in triggered mode

●

Trigger delay unit to compensate the delay of external low pass filter

●

Double buffered global trigger unit allowing eTimer synchronization and/or ADC

command generation

●

Double buffered ADC command list pointers to minimize ADC-trigger unit update

●

Double buffered ADC conversion command list with as many as 24 ADC commands

●

Each trigger capable of generating consecutive commands

●

ADC conversion command allows control of ADC channel from each ADC, single or

synchronous sampling, independent result queue selection

●

DMA support with safety features

1.5.35

Cyclic Redundancy Checker (CRC) Unit

The CRC module is a configurable multiple data flow unit to compute CRC signatures on

data written to its input register.

The CRC unit has the following features:

●

3 sets of registers to allow 3 concurrent contexts with possibly different CRC

computations, each with a selectable polynomial and seed

●

Computes 16- or 32-bit wide CRC on the fly (single-cycle computation) and stores

result in internal register.

The following standard CRC polynomials are implemented:

–x8 + x4 + x3 + x2 + 1 [8-bit CRC]

–x16 +x12 +x5 + 1 [16-bit CRC-CCITT]

–

x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x +1

[32-bit CRC-ethernet(32)]

●

Key engine to be coupled with communication periphery where CRC application is

added to allow implementation of safe communication protocol

●

Offloads core from cycle-consuming CRC and helps checking configuration signature

for safe start-up or periodic procedures

●

CRC unit connected as peripheral bus on internal peripheral bus

●

DMA support

1.5.36

Redundancy Control and Checker Unit (RCCU)

The RCCU checks all outputs of the sphere of replication (addresses, data, control signals).

It has the following features:

●

Duplicated module to guarantee highest possible diagnostic coverage (check of

checker)

●

Multiple times replicated IPs are used as checkers on the SoR outputs

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