Deserial Serial Peripheral Interface (DSPI)
Freescale Semiconductor
25-3
PXR40 Microcontroller Reference Manual, Rev. 1
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Programmable transfer attributes on a per-frame basis:
— Eight transfer attribute registers
— Serial clock with programmable polarity and phase
— Various programmable delays
— Programmable serial frame size of 4 to 32 bits, expandable by software control
— Continuously held chip select capability
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8 Peripheral Chip Selects, expandable to 256 with external demultiplexer
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Deglitching support for up to 128 Peripheral Chip Select with external demultiplexer
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DMA support for adding entries to TX FIFO and removing entries from RX FIFO:
— TX FIFO is not full (TFFF)
— RX FIFO is not empty (RFDF)
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6 Interrupt conditions:
— End of queue reached (EOQF)
— TX FIFO is not full (TFFF)
— Transfer of current frame complete (TCF)
— Attempt to transmit with an empty Transmit FIFO (TFUF)
— RX FIFO is not empty (RFDF)
— Frame received while Receive FIFO is full (RFOF)
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Modified SPI transfer formats for communication with slower peripheral devices
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Power-saving architectural features
— Support for Stop Mode
The DSPI also supports pin reduction through serialization and deserialization.
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Two sources of serialized data:
— DSPI memory-mapped register
— Parallel Input signals
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Deserialized data is provided as Parallel Output signals and as bits in a memory-mapped register
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Transfer initiation conditions:
— Continuous
— Edge sensitive hardware trigger
— Change in data
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Support for parallel and serial chaining of up to four DSPI blocks
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Pin serialization/deserialization with interleaved SPI frames for control and diagnostics
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Continuous serial communications
clock
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Enhanced DSI logic to implement a 32 bits Timed Serial Bus (TSB) configuration, supporting the
Micro Second Bus downstream frame format.
Summary of Contents for PXR4030
Page 1: ...PXR40 Microcontroller Reference Manual Devices Supported PXR4030 PXR4040 PXR40RM Rev 1 06 2011...
Page 30: ...PXR40 Microcontroller Reference Manual Rev 1 Freescale Semiconductor xxx...
Page 40: ...PXR40 Microcontroller Reference Manual Rev 1 xl Freescale Semiconductor...
Page 66: ...Memory Map PXR40 Microcontroller Reference Manual Rev 1 2 4 Freescale Semiconductor...
Page 120: ...Signal Descriptions 3 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 860: ...FlexCAN Module 24 50 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 1167: ...Decimation Filter Freescale Semiconductor 28 53 PXR40 Microcontroller Reference Manual Rev 1...
Page 1168: ...Decimation Filter 28 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
