SPC56EL54x datasheet(22/165 Pages) STMICROELECTRONICS

22 / 165 page

Introduction

SPC56ELx, SPC564Lx

22/165

DocID15457 Rev 12

The RC oscillator provides these features:



Nominal frequency 16 MHz



±5% variation over voltage and temperature after process trim



Clock output of the RC oscillator serves as system clock source in case loss of lock or

loss of clock is detected by the FMPLL



RC oscillator is used as the default system clock during startup and can be used as

back-up input source of FMPLL(s) in case XOSC fails

1.5.17

Clock, reset, power, mode and test control modules (MC_CGM,

MC_RGM, MC_PCU, and MC_ME)

These modules provide the following:



Clock gating and clock distribution control



Halt, stop mode control



Flexible configurable system and auxiliary clock dividers



Various execution modes

–

HALT and STOP mode as reduced activity low power mode

–

Reset, Idle, Test, Safe

–

Various RUN modes with software selectable powered modules

–

No stand-by mode implemented (no internal switchable power domains)

1.5.18

Periodic Interrupt Timer Module (PIT)

The PIT module implements the following features:



4 general purpose interrupt timers



32-bit counter resolution



Can be used for software tick or DMA trigger operation

1.5.19

System Timer Module (STM)

The STM implements the following features:



Up-counter with 4 output compare registers



OS task protection and hardware tick implementation per AUTOSAR(a) requirement

The STM is replicated for each processor.

1.5.20

Software Watchdog Timer (SWT)

This module implements the following features:



Fault tolerant output



Safe internal RC oscillator as reference clock



Windowed watchdog



Program flow control monitor with 16-bit pseudorandom key generation



Allows a high level of safety (SIL3 monitor)

a. Automotive Open System Architecture.

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