R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 452

• Manufacturer Part Number: R5F61525
• Description: 32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Mar. 14, 2006 Page 414 of 804
REJ09B0104-0300
No
No
Read receive data in RDR, and
clear RDRF flag in SSR to 0
PER ∨ FER ∨ ORER = 1
Read RDRF flag in SSR
Clear RE bit in SCR to 0
Read ORER, PER, and
Figure 12.9 Sample Serial Reception Flowchart (1)
All data received?
FER flags in SSR
Start reception
Initialization
RDRF = 1
<End>
Yes
Yes
No
(Continued on next page)
Error processing
Yes
[1]
[2]
[4]
[5]
[3]
[1] SCI initialization:
[2] [3] Receive error processing and break
[4] SCI state check and receive data read:
[5] Serial reception continuation procedure:
The RxD pin is automatically
designated as the receive data input
pin.
detection:
If a receive error occurs, read the
ORER, PER, and FER flags in SSR to
identify the error. After performing the
appropriate error processing, ensure
that the ORER, PER, and FER flags are
all cleared to 0. Reception cannot be
resumed if any of these flags are set to
1. In the case of a framing error, a
break can be detected by reading the
value of the input port corresponding to
the RxD pin.
Read SSR and check that RDRF = 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.
To continue serial reception, before the
stop bit for the current frame is
received, read the RDRF flag and RDR,
and clear the RDRF flag to 0.
However, the RDRF flag is cleared
automatically when the DMAC is
initiated by an RXI interrupt and reads
data from RDR.