PXN20PB Datasheet, PDF (13/23 Pages) Freescale Semiconductor, Inc – 32-bit Power Architecture® Dual Core Microcontrollers for Industrial Networking

— 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
Features
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 Inter-IC Communications Module (I²C)
The I²C module features the following:
• Two-wire bi-directional serial bus for on-board communications
PXN20 Product Brief, Rev. 1
Freescale Semiconductor
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