STMicroelectronics SPC572L series Reference Manual page 1144

Deserial Serial Peripheral Interface (DSPI)
Field
DSPI Configuration
Selects the DSPI configuration.
2–3 00 SPI
DCONF 01 DSI
10 CSI
11 Reserved
Freeze
Enables the DSPI transfers to be stopped on the next frame boundary when the device enters
4
Debug mode.
FRZ
0 Do not halt serial transfers in debug mode.
1 Halt serial transfers in debug mode.
Modified Timing Format Enable
Enables a modified transfer format to be used.
5
MTFE should not be set in ITSB Mode as Microsecond Channel upstream operation is not
MTFE supported.
0 Modified SPI transfer format disabled.
1 Modified SPI transfer format enabled.
Peripheral Chip Select Strobe Enable
6
Enables the PCS[5]/ PCSS to operate as a PCS Strobe output signal.
PCSSE 0 PCS[5]/PCSS is used as the Peripheral Chip Select[5] signal (PCS[5]).
1 PCS[5]/PCSS is used as an active-low PCS Strobe signal (PCSS).
Receive FIFO Overflow Overwrite Enable
In the RX FIFO overflow condition, configures the DSPI to ignore the incoming serial data or
7
overwrite existing data. If the RX FIFO is full and new data is received, the data from the transfer
generating the overflow is ignored or shifted into the shift register.
ROOE
0 Incoming data is ignored.
1 Incoming data is shifted into the shift register.
Peripheral Chip Select x Inactive State
Determines the inactive state of PCSx when DSPI is in Master Mode.
8–15
This field has no effect when DSPI is in Slave Mode. The Slave Select input to DSPI in slave
PCSIS[7:0] mode is always Active Low.
0 The inactive state of PCSx is low.
1 The inactive state of PCSx is high.
16
This read-only bitfield is reserved and always has the value zero.
Reserved
Module Disable
Allows the clock to be stopped to the non-memory-mapped logic in the DSPI, putting the DSPI in
a software controlled power-saving state.
17
The reset value of the MDIS bit is 1.
MDIS
MDIS should be set to '0' in Slave Mode as a slave doesn't control master transactions.
0 Enable DSPI clocks.
1 Allow external logic to disable DSPI clocks.
1144/2058
Table 610. DSPI_MCR field descriptions(Continued)
DocID027809 Rev 4
Description
RM0400