PXS20RM Datasheet, PDF (326/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Deserial Serial Peripheral Interface (DSPI)
16.2.4 PCS[5]/PCSS — Peripheral Chip Select 5/Peripheral Chip Select
Strobe
PCS[5] is a Peripheral Chip Select output signal.
When the DSPI is in master mode and the DSPI_MCR[PCSSE] bit is cleared, this signal selects which
slave device the current transfer is intended for.
When the DSPI is in master mode and the DSPI_MCR[PCSSE] bit is set, the PCSS signal acts as a strobe
to external peripheral chip select demultiplexer, which decodes the PCS[0] - PCS[4] and PCS[6] - PCS[7]
signals, preventing glitches on the demultiplexer outputs.
This signal is not used in slave mode.
16.2.5 PCS[6] - PCS[7] — Peripheral Chip Selects 6 - 7
In master mode, PCS[6] - PCS[7] are Peripheral Chip Select output signals.
In slave mode these signals are not used.
16.2.6 SIN — Serial Input
SIN is a serial data input signal.
16.2.7 SOUT — Serial Output
SOUT is a serial data output signal.
16.2.8 SCK — Serial Clock
SCK is a serial communication clock signal. In master mode, the DSPI generates the SCK. In slave mode,
SCK is an input from an external bus master.
16.3 Memory map and register definition
16.3.1 Memory map
Register accesses to memory addresses that are reserved or undefined result in a transfer error. Write
access to the DSPI_POPR register also result in a transfer error.
Table 16-2 shows the DSPI memory map.
16-6
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor