Renesas RX100 Series User Manual page 697

RX13T Group
Set 1 to TCR.TCST
STR.BFDF = 1?
Set 1 to STCR.BFDCL
Set TCR.TCST to 0
Set SCR.TE to 0 and then 1
TXI interrupt?
Write transmit data in Control Field 0
to TDR
TXI interrupt?
Write transmit data in Control Field 1
to TDR
Information Frame communications
Figure 23.62 Example of Start Frame Transmission (2/2)
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
A
No
Yes
No
Yes
No
Yes
23. Serial Communications Interface (SCIg, SCIh)
Start the timer counter and output of the Break Field low width.
The STR.BFDF flag is set to 1 on output of the Break Field low width. At
this time, if the ICR.BFDIE bit is 1, an SCIX0 interrupt is generated.
Clear the BFDF flag.
After output of the Break Field low width is completed, stop the timer
counting before the next underflow of the timer occurs.
After setting the SCR.TE bit to 0, set it to 1.
The transmit data empty interrupt (TXI) request is generated. Write
transmit data in Control Field 0 to the TDR register with the TXI interrupt
handling routine.
The transmit data empty interrupt (TXI) request is generated. Write
transmit data in Control Field 1 to the TDR register with the TXI interrupt
handling routine.
Send the Information Frame.
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