NXP Semiconductors MPC5566, Reference Manual

Page: 929 / 1268

Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
20-4 Freescale Semiconductor
• Two DMA conditions for SPI queues residing in RAM or flash
— TX FIFO is not full (TFFF)
— RX FIFO is not empty (RFDF)
• Six interrupt conditions:
– End of queue reached (EOQF)
– TX FIFO is not full (TFFF)
– Transfer of current frame complete (TCF)
– RX FIFO is not empty (RFDF)
– FIFO overrun
– Attempt to transmit an empty TX FIFO
– Serial frame was received while RX FIFO is full (RFOF)
– FIFO under flow
For the slave only in SPI mode.
Request to the slave for a data transfer when the TX FIFO is empty (TFUF)
• Modified SPI transfer formats for communication with slower peripheral devices
• Supports all functional modes from QSPI subblock of QSMCM (MPC500 family)
• Continuous serial communications clock (SCK)
When configured for DSI or CSI operation, the DSPI supports pin reduction through serialization and
deserialization.
• Serialized data sources
— eTPUA, eTPUB and eMIOS output channels
— Memory-mapped register in the DSPI
• Deserialized data destinations
— eTPUA and eMIOS input channels
— SIU external interrupt request inputs
— Memory-mapped register in the DSPI
• Transfer initiation conditions
– Continuous
– Edge-sensitive hardware trigger
– Change in data
• Support for parallel and serial chaining of DSPI modules
• Pin serialization/deserialization with interleaved SPI frames for control and diagnostics