Renesas H8S/2100 Series Hardware Manual page 508

Section 16 Serial Communication Interface with FIFO (SCIF)
(2) Data Transmission/Reception Standby
Figure 16.7 shows an example of the data transmission/reception standby flowchart.
Figure 16.7 Example of Data Transmission/Reception Standby Flowchart
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REJ09B0462-0100
Initialization
Yes
Receive data
ready interrupt
No
Yes
Transmit data exists
No
[1] When a receive data ready interrupt
occurs, go to the reception flow.
[2] When transmit data exists, go to the
transmission flow.
[1]
(Reception flow)
[2]
(Transmission flow)