Texas Instruments OMAP5912 Reference Manual page 1099

SPI Master/Slave
Figure 5. MCU-DSP Transmit Protocol in Slave Mode With CIi = 0, CEi = 0 and
CPi = 0
MCU-DSP write
SPI_TX
SPI_CTRL
WR = 1
SPEN0
SRCLK
SPI_SR
TSPDO
TSPDI
TSPDOEN
IRQ
SPI_ISR
34 Serial Interfaces
1
DATA1
dNB
dNB
MCU-DSP write in SPI_ISR
DATA 1
WR = 0
NB+1
d0
d0
SPI_SR[31:0]
WE = 1 WE = 0
SPRU760B