SPC56EL70L3 datasheet(29/128 Pages) STMICROELECTRONICS

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SPC56EL70L3, SPC56EL70L5,PC564L70L3, SPC564L70L5

Introduction

127

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:

–

+ 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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