SH7785 Datasheet, PDF (1171/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

22. Serial I/O with FIFO (SIOF)
(3) Transmission in Slave Mode
Figure 22.11 shows an example of settings and operation for slave mode transmission.
No.
Flowchart
Start
1
Set SIMDR, SISCR, SITDAR,
SIRDAR, SICDAR, SITCR,
and SIFCTR
2
Set the TXE bit in SICTR to 1
3
No
TDREQ = 1
Yes
4
Set SITDR
5
Transmit SITDR from SIOF_TXD
synchronously with SIOF_SYNC
SIOF Settings
SIOF Operation
Set operating mode, serial clock, slot
positions for transmit/receive data, slot
position for control data, and FIFO
request threshold value
Set to enable transmission
Issue transmit transfer
request to enable
transmission when frame
synchronous signal is
input
Set transmit data
Transmit
No
Transfer ended?
Yes
6
Clear the TXE bit in SICTR to 0
Set to disable transmission
End
End transmission
Figure 22.11 Example of Transmit Operation in Slave Mode
Rev.1.00 Jan. 10, 2008 Page 1141 of 1658
REJ09B0261-0100