SH7720 Datasheet, PDF (785/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 21 Serial I/O with FIFO (SIOF)
(3) Transmission in Slave Mode
Figure 21.11 shows an example of settings and operation for slave mode transmission.
No.
Flow Chart
Start
1
Set SIMDR, SISCR, SITDAR,
SIRDAR, SICDAR, and SIFCTR
2
Set the TXE bit in SICTR to 1
3
No
TDREQ = 1?
Yes
4
Set SITDR
5
Transmit SITDR from SIOFTXD
synchronously with SIOFSYNC
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
Transfer
No
ended?
Yes
6
Clear the TXE bit in SICTR to 0
End
Set to disable transmission
End transmission
Figure 21.11 Example of Transmit Operation in Slave Mode
Rev. 3.00 Jan. 18, 2008 Page 723 of 1458
REJ09B0033-0300