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Section 19 Serial I/O with FIFO
Page 972 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
(3) Transmission in Slave Mode
Figure 19.8 shows an example of transmission settings and operation for when this module is used
as a slave.
Start
No
Ye s
No
Ye s
End
No.
1
2
3
4
5
6
Set SIMDR, SISCR, SITDAR,
and SIFCTR
Set the TXE bit in SICTR to 1
TDREQ = 1?
Set SITDR
Transmit SITDR from SIOFTXD
synchronously with SIOFSYNC
Transfer
ended?
Clear the TXE bit in SICTR to 0
Set operating mode, serial clock,
slot position for transmit data,
and FIFO request threshold
value
Set transmit data
Set to disable transmission
Issue transmit transfer request
to enable transmission when
frame synchronous signal is
input
Transmit
End transmission
Flow Chart
Settings of This Module Operation of This Module
Set to enable transmission
Figure 19.8 Example of Transmit Operation in Slave Mode