Deserial Serial Peripheral Interface (Dspi) - STMicroelectronics SPC572L series Reference Manual

Deserial Serial Peripheral Interface (DSPI)

46 Deserial Serial Peripheral Interface (DSPI)
46.1 Introduction
The Deserial Serial Peripheral Interface (DSPI) module provides a synchronous serial bus
for communication between an MCU and an external peripheral device. The module
supports MCU pin count reduction through serialization and deserialization of MCU internal
signals transmitted over the SPI serial link.
Note: For the chip-specific implementation details of the instances of this module, see the Device
Configuration chapter.
46.1.1 Block diagram
Figure 582
1134/2058
provides the block diagram of this module.
Figure 582. DSPI block diagram
eDMA
DMA and Interrupt control
DSPI_PUSHR
CMD Data
CSI
64
Shift Register
SPI and DSI
Baud Rate, Delay &
Transfer Control
INTC
SPI
DSPI_POPR
Data
64
DocID027809 Rev 4
Slave Bus Interface Clock/Reset
DSI
Frame
64
SOC
64
SOC
External Trigger
Hardware Trigger (HT)
PCS[x]/SS/PCSS
RM0400
64
SOUT
SIN
SCK