H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 635

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

[3]
No
No
Read receive data in RDR, and
Clear ORER flag in SSR to 0
clear RDRF flag in SSR to 0
Overrun error processing
Read ORER flag in SSR
Read RDRF flag in SSR
Clear RE bit in SCR to 0
All data received?
Error processing
Start reception
Figure 13.18 Sample Serial Reception Flowchart
Initialization
ORER = 1
RDRF = 1
<End>
<End>
Yes
Yes
No
(Continued below)
Error processing
Yes
Section 13 Serial Communication Interface (SCI)
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Rev. 3.00 Sep 15, 2006 page 601 of 988
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The RxD pin is automatically
designated as the receive data
input pin.
If a receive error occurs, read the
ORER flag in SSR , and after
performing the appropriate error
processing, clear the ORER flag
to 0. Transfer cannot be resumed
if the ORER flag is set to 1.
SCI status check and receive
data read:
Read SSR and check that the
RDRF flag is set to 1, then read
the receive data in RDR and
clear the RDRF flag to 0.
Transition of the RDRF flag from
0 to 1 can also be identified by
an RXI interrupt.
Serial reception continuation
procedure:
To continue serial reception,
before the MSB (bit 7) of the
current frame is received, finish
reading the RDRF flag, reading
RDR, and clearing the RDRF flag
to 0. The RDRF flag is cleared
automatically when the DMAC or
DTC is activated by a receive
data full interrupt (RXI) request
and the RDR value is read.
SCI initialization:
Receive error processing:
REJ09B0330-0300