Toshiba H1 Series Data Book page 491

Transmit/Receive
When transmitting or receiving, write <FDPXE>= "1"
Writing <FDPXE>= "1" first, and SPICT<RXE>= "1" and keep waiting state for starting
UNIT receiving. When writing SPICT<RXE>= "1"after <ALGNEN>= "1", receiving does not
start right away. This is because the data to transmit at the same time has not been prepared.
Transmit/receive start when writing the data to (SPITD) register with the condition <TXE>=
"1".
The waveform of each transmit/receive operation is as follows;
Start
receiving
Transmitter
SPCLK output
SPDI input
Receiver
SPCLK output
SPDO output
Note: If transmit/receive are not operated simultaneously, please communicate with the condition <FDPXE>="0".
Start
transmitting
LS
Bit1
LSB
Bit0
Bit1
Figure 3.17.8 Transmit/Receive
92CZ26A-488
Bit2
Bit4
Bit5
Bit2 Bit3 Bit6
Bit4
TMP92CZ26A
Bit7