Texas Instruments OMAP5912 Reference Manual page 1111

SPI Master/Slave
Figure 11. DMA Receive Protocol in Slave Mode With CIi = 0, CEi = 0 and CPi = 0
MCU-DSP write
SPI_CTRL
SPEN0
SRCLK
SPI_SR
dNB
TSPDO
dNB
TSPDI
TSDOEN
RX_ndma_req
RX_FULL = 0
SPI_DSR
SPI_RX
46 Serial Interfaces
DMA read on SPI_RX
1 NB+1
d0
d0
RX_FULL = 1
RD = 1; WR = 0
1 NB+1
DATA1
d0
dNB
dNB d0
RX_FULL = 0
DATA 1
DMA read on SPI_RX
DATA2
RX_FULL = 1 RX_FULL = 0
DATA2
SPRU760B