PXD10RM Datasheet, PDF (283/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Chapter 11
Deserial Serial Peripheral Interface (DSPI)
11.1 Introduction
This chapter describes the deserial serial peripheral interface (DSPI), which provides a synchronous serial
bus for communication between the MCU and an external peripheral device.
This device implements DSPI 0 and DSPI 1. The "x" appended to signal names signifies the DSPI module
to which the signal applies. Thus CS0_0 is the CS0 signal that applies to DSPI 0, CS0_1 is the CS0 signal
that applies to DSPI 1.
11.2 Block diagram
A block diagram of the DSPI is shown in Figure 11-1.
eDMA
INTC
SPI
DMA and interrupt control
TX FIFO
RX FIFO
CMD TX data
RX data
16
16
Shift register
SPI baud rate,
delay and transfer
4
control
Figure 11-1. DSPI Block Diagram
SOUT_x
SIN_x
SCK_x
CS0_x
CS1:4_x
CS5_x
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
11-1