r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1113
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r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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Part Number:
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Manufacturer:
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In serial reception, the SCIF operates as follows.
1. The SCIF monitors the transmission line, and if a 0-start bit is detected, performs internal
2. The received data is stored in SCRSR in LSB-to-MSB order.
3. The parity bit and stop bit are received.
4. If the RIE bit in SCSCR is set to 1 when the RDF or DR flag changes to 1, a receive-FIFO-
Figure 21.13 shows an example of the operation for reception in asynchronous mode.
synchronization and starts reception.
After receiving these bits, the SCIF carries out the following checks.
(a) Stop bit check: The SCIF checks whether the stop bit is 1. If there are two stop bits, only
(b) The SCIF checks whether receive data can be transferred from SCRSR to SCFRDR.*
(c) Overrun error check: The SCIF checks that the ORER flag is 0, indicating that no overrun
(d) Break check: The SCIF checks that the BRK flag is 0, indicating that the break state is not
data-full interrupt (RXI) request is generated.
If the RIE bit or REIE bit in SCSCR is set to 1 when the ER flag changes to 1, a receive-error
interrupt (ERI) request is generated.
If the RIE bit or REIE bit in SCSCR is set to 1 when the BRK or ORER flag changes to 1, a
break reception interrupt (BRI) request is generated.
Note: * Reception continues even when a parity error or framing error occurs.
the first is checked.
error has occurred.*
set.*
If (b), (c), and (d) checks are passed, the receive data is stored in SCFRDR.
Serial
data
SCIF_RXD
RDF
FER
1
Start
bit
0
Figure 21.13 Example of SCIF Receive Operation
D0
(Example with 8-Bit Data, Parity, One Stop Bit)
One frame
D1
Data
D7
RXI interrupt
request
Parity
bit
0/1
Stop
bit
1
Start
bit
0
Data read and RDF flag
read as 1 then cleared to
0 by RXI interrupt handler
21. Serial Communication Interface with FIFO (SCIF)
D0
D1
Rev.1.00 Jan. 10, 2008 Page 1083 of 1658
Data
D7
Parity
bit
0/1
Stop
bit
ERI interrupt request
generated by receive
error
0
Framing error
detected
REJ09B0261-0100
0/1
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