PXS20 Product Brief, Rev. 1

Features

Freescale Semiconductor

18

— 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

2.5.23

Non-Maskable Interrupt (NMI)

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

2.5.24

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 (CAN or UART/LIN)

•

Supports programmable 64-bit password protection for serial boot mode

•

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

code

•

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

2.5.25

System Status and Configuration Module (SSCM)

The SSCM on this device features the following:

•

System configuration and status

•

Debug port status and debug port enable

•

Multiple boot code starting locations out of reset through implementation of search for valid Reset

Configuration Half Word

•

Sets up the MMU to allow user boot code to execute as either classic PowerPC Book E code

(default) or as Freescale VLE code out of flash memory

•

Triggering of device self-tests during reset phase of device boot

2.5.26

Controller Area Network Module (CAN)

The CAN module is a communication controller implementing the CAN protocol according to Bosch

Specification version 2.0B. Although the CAN interface was designed to be used primarily as a vehicle

networking bus, it is widely used in industrial and other transport applications due to its robust operation,

time determinism, cost effectiveness, and optional redundant physical layer implementation.

The CAN module provides the following features:

•

Full implementation of the CAN protocol specification, version 2.0B

— Standard data and remote frames