Features

PXN20 Product Brief, Rev. 1

Freescale Semiconductor

13

— Sync field; Delimiter; ID parity; Bit, Framing; Checksum and Timeout errors

— Classic or extended checksum calculation

— Configurable Break duration of up to 36-bit times

— Programmable Baud rate prescalers (13-bit mantissa, 4-bit fractional)

— Diagnostic features

– Loop back

–Self Test

– LIN bus stuck dominant detection

— Interrupt driven operation with 16 interrupt sources

— LIN slave mode features

– Autonomous LIN header handling

– Autonomous LIN response handling

– Discarding of irrelevant LIN responses using up to 16 ID filters

2.6.10

Controller Area Network Module (CAN)

The enhanced CAN module features the following:

•

Compliant with CAN protocol specification, Version 2.0B active

•

64 mailboxes, each configurable as transmit or receive

— Mailboxes configurable while module remains syncronised to CAN bus

•

Transmit features

— Arbitration scheme according to message ID, message buffer number or local priority

— Internal arbitration to guarantee no inner priority inversion

— Multiple transmit buffers to avoid outer priority inversion

— Transmit abort procedure and notification

•

Receive features

— Individual programmable filters for each mailbox

— Hardware FIFO can be enabled

– 8 mailboxes can be configured to provide a 6-entry receive FIFO and 8 programmable

acceptance filters

•

Programmable clock source

— System clock

— Direct oscillator clock to avoid PLL jitter

— Listen only mode capabilities

2.6.11

•

Two-wire bi-directional serial bus for on-board communications