PXS20RM Datasheet, PDF (57/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

— Separate transmitter and receiver CPU interrupt sources
— 16-bit programmable baud-rate modulus counter and 16-bit fractional
— 2 receiver wake-up methods
• LIN features:
— Autonomous LIN frame handling
— Message buffer to store identifier and up to eight data bytes
— Supports message length of up to 64 bytes
— Detection and flagging of LIN errors
— 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
Introduction
1.4.29 Serial Peripheral Interface (SPI)
The SPI modules provide a synchronous serial interface for communication between the PXS20 and
external devices.
A SPI module provides these features:
• Full duplex, synchronous transfers
• Master or slave operation
• Programmable master bit rates
• Programmable clock polarity and phase
• End-of-transmission interrupt flag
• Programmable transfer baud rate
• Programmable data frames from 4 to 16 bits
• As many as 8 chip select lines available, depending on package and pin multiplexing
• 4 clock and transfer attributes registers
• Chip select strobe available as alternate function on one of the chip select pins for de-glitching
• FIFOs for buffering as many as 5 transfers on the transmit and receive side
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
1-17