hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 301

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

• Receiving
Figure 10.8 shows an example of a flowchart for data reception. This procedure should be
followed for data reception after initializing SCI3.
286
1
2
3
PER, FER in SSR
Read bit RDRF
Read bits OER,
Clear bit RE to
Continue data
Figure 10.8 Example of Data Reception Flowchart (Asynchronous Mode)
Read receive
OER + PER
+ FER = 1?
data in RDR
RDRF = 1?
reception?
0 in SCR3
in SSR
Start
End
No
Yes
No
4
Receive error
processing
Yes
No
Yes
(A)
1.
2.
3.
Read bits OER, PER, and FER in the
serial status register (SSR) to determine
if there is an error. If a receive error has
occurred, execute receive error
processing.
Read SSR and check that bit RDRF is
set to 1. If it is, read the receive data
in RDR. When the RDR data is read,
bit RDRF is cleared to 0 automatically.
reading of bit RDRF and RDR before
receiving the stop bit of the current
frame. When the data in RDR is read,
bit RDRF is cleared to 0 automatically.
When continuing data reception, finish