SPC56AP54X datasheet(18/104 Pages) STMICROELECTRONICS

18 / 104 page

Introduction

SPC56xP54x, SPC56xP60x

18/104

Doc ID 18340 Rev 3

1.5.13

Software watchdog timer (SWT)

The SWT has 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

The SWT module is replicated for each processor.

1.5.14

Fault collection and control unit (FCCU)

The FCCU provides an independent fault reporting mechanism even if the CPU is exhibiting

unstable behaviors. The FCCU module has the following features:

●

Redundant collection of hardware checker results

●

Redundant collection of error information and latch of faults from critical modules on

the device

●

Collection of self-test results

●

Configurable and graded fault control

–

Internal reactions (no internal reaction, IRQ)

–

External reaction (failure is reported to the external/surrounding system via

configurable output pins)

1.5.15

System integration unit (SIUL)

The SPC56xP54/60 SIUL controls MCU pad configuration, external interrupts, general

purpose I/O (GPIO) pin configuration, and internal peripheral multiplexing.

The pad configuration block controls the static electrical characteristics of I/O pins. The

GPIO block provides uniform and discrete input/output control of the I/O pins of the MCU.

The SIUL provides the following features:

●

Centralized general purpose input output (GPIO) control of input/output pins and

analog input-only pads (package dependent)

●

All GPIO pins can be independently configured to support pull-up, pull down, or no pull

●

Reading and writing to GPIO supported both as individual pins and 16-bit wide ports

●

All peripheral pins (except ADC channels) can be alternatively configured as both

general purpose input or output pins

●

ADC channels support alternative configuration as general purpose inputs

●

Direct readback of the pin value is supported on all pins through the SIU

●

Configurable digital input filter that can be applied to some general purpose input pins

for noise elimination

–

Up to 4 internal functions can be multiplexed onto one pin

1.5.16

Boot and censorship

Different booting modes are available in the SPC56xP54/60:

●

From internal flash memory

●

Via a serial link

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