RX610 Group
20. Serial Communications Interface (SCI)
R01UH0032EJ0120 Rev.1.20
Page 655 of 1006
Feb 20, 2013
No
Yes
Initialization
Start transmission
Write transmit data to TDR
No
Yes
No
Yes
Clear bits TIE, TE, and TEIE
in SCR to 0
TXI interrupt
All data transmitted
SSR.TEND = 1
[ 1 ]
[ 2 ]
[ 3 ]
[ 1 ] SCIn initialization:
The TxDn pin is automatically designated as the
transmit data output pin.
[ 2 ] Transmit data write to TDR upon accepting a TXI
interrupt request:
When transmit data is transferred from TDR to TSR, a
transmit data empty interrupt (TXI) request is
generated.
Write transmit data to TDR once upon accepting a
transmit data empty interrupt (TXI) request.
[ 3 ] Serial transmission continuation procedure:
To continue serial transmission, write transmit data to
TDR upon accepting a TXI interrupt request. Transmit
data can also be written to TDR by initiating the
DMAC or DTC when a TXI interrupt request is
accepted.
Read TEND flag in SSR
Clear the TIE bit in SCR to 0
End
Figure 20.16 Example of Serial Transmission Flowchart (Clock Synchronous Mode)
Summary of Contents for RX600 Series
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