MPC5643L datasheet(14/98 Pages) FREESCALE

14 / 98 page

MPC5643L Microcontroller Data Sheet, Rev. 3

Preliminary—Subject to Change Without Notice

Overview

Freescale Semiconductor

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Fault tolerant output

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Safe internal RC oscillator as reference clock

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Windowed watchdog

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Program flow control monitor with 16-bit pseudorandom key generation

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Allows a high level of safety (SIL3 monitor)

The SWT module is replicated for each processor.

1.3.21

Fault Collection and Control Unit (FCCU)

The FCCU module has the following features:

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Redundant collection of hardware checker results

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

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Collection of self-test results

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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)

1.3.22

System Integration Unit Lite (SIUL)

The SIUL controls MCU reset configuration, pad configuration, external interrupt, general purpose I/O (GPIO), internal

peripheral multiplexing, and the 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:

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Centralized pad control on 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

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Input filtering for external interrupts

1.3.23

Non-Maskable Interrupt (NMI)

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

1.3.24

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:

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

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Supports programmable 64-bit password protection for serial boot mode

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Supports serial bootloading of either classic PowerPC Book E code (default) or Freescale VLE code

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

MPC5643L Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc

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