Texas Instruments OMAP5912 Reference Manual page 1101

SPI Master/Slave
Figure 6. MCU-DSP RX/TX Protocol in Slave Mode With CIi = 0, CEi = 0 and CPi = 0
MCU-DSP write
SPI_TX
SPI_CTRL
RD = 1
TSPENi
SRCLK
SPI_SR
TSPDO
TSPDI
TSPDOEN
IRQ
SPI_ISR
SPI_RX
36 Serial Interfaces
1
DATA1
dNB
dNB
MCU-DSP write in SPI_ISR
DATA 1
RD = 0
NB+1
d0
d0
READ DATA 1
RE = 1 RE = 0
READ DATA 1
SPRU760B