Hitachi H8/3672 Series Hardware Manual page 204

Read OER flag in SSR
Read RDRF flag in SSR
No
Read receive data in RDR
Yes
All data received?
Clear RE bit in SCR3 to 0
[4]
Overrun error processing
Clear OER flag in SSR to 0
Figure 13-13 Sample Serial Reception Flowchart(Clocked Synchronous Mode)
Rev. 1.0, 03/01, page 180 of 280
Start reception
OER = 1
No
Error processing
(Continued below)
RDRF = 1
Yes
No
<End>
Error processing
<End>
[1] Read the OER flag in the serial status
register (SSR) to determine if there is an
[1] error. If an overrun error has occurred,
execute overrun error processing.
[2] Read SSR and check that the RDRF flag is
Yes
set to 1, then read the receive data in RDR.
When data is read from RDR, the RDRF
[4]
flag is automatically cleared to 0.
[3] To continue serial reception, before the
MSB (bit 7) of the current frame is received,
reading the RDRF flag, reading RDR, and
clearing the RDRF flag to 0 should be
[2]
finished. When data is read from RDR, the
RDRF flag is automatically cleared to 0.
[4] If an overrun error occurs, read the OER
flag in SSR, and after performing the
appropriate error processing, clear the OER
[3]