PXS20 Datasheet, PDF (17/119 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

— 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
1.5.29 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
• Queueing operation possible through use of the eDMA
• General purpose I/O functionality on pins when not used for SPI
1.5.30 Pulse Width Modulator (PWM)
The PWM module contains four PWM channels, each of which is configured to control a single half-bridge power stage. Two
modules are included on 257 MAPBGA devices; on the 144 LQFP package, only one module is present. Additionally, four
fault input channels are provided per PWM module.
This PWM is capable of controlling most motor types, including:
• AC induction motors (ACIM)
• Permanent Magnet AC motors (PMAC)
• Brushless (BLDC) and brush DC motors (BDC)
• Switched (SRM) and variable reluctance motors (VRM)
• Stepper motors
A PWM module implements the following features:
• 16 bits of resolution for center, edge aligned, and asymmetrical PWMs
PXS20 Microcontroller Data Sheet, Rev. 1
Freescale Semiconductor
17
Preliminary—Subject to Change Without Notice