SPC56EL54X datasheet(23/165 Pages) STMICROELECTRONICS

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SPC56ELx, SPC564Lx

Introduction

164

The SWT module is replicated for each processor.

1.5.21

Fault Collection and Control Unit (FCCU)

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, Functional Reset, Destructive Reset,

or Safe mode entered)

–

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

configurable output pins)

1.5.22

System Integration Unit Lite (SIUL)

The SIUL controls MCU reset configuration, pad configuration, external interrupt, general

purpose I/O (GPIO), internal peripheral multiplexing, and system reset operation. The reset

configuration block contains the external pin boot configuration logic. 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 SIU provides the following features:



Centralized pad control on a per-pin basis

–

Pin function selection

–

Configurable weak pull-up/down

–

Configurable slew rate control (slow/medium/fast)

–

Hysteresis on GPIO pins

–

Configurable automatic safe mode pad control



Input filtering for external interrupts

1.5.23

Non-Maskable Interrupt (NMI)

The non-maskable interrupt with de-glitching filter supports high-priority core exceptions.

1.5.24

Boot Assist Module (BAM)

The BAM is a block of read-only memory with hard-coded content. The BAM program is

executed only if serial booting mode is selected via boot configuration pins.

The BAM provides the following features:



Enables booting via serial mode (FlexCAN or LINFlex-UART)



Supports programmable 64-bit password protection for serial boot mode



Supports serial bootloading of either Power Architecture code (default) or VLE code



Automatic switch to serial boot mode if internal flash memory is blank or invalid

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