SH7018 Datasheet, PDF (244/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

Transmit/Receive Formats: Table 12.10 shows the 12 communication formats that can be
selected in the asynchronous mode. The format is selected by settings in the serial mode register
(SMR1).
Table 12.10 Serial Communication Formats (Asynchronous Mode)
SMR1 Bits
Serial Transmit/Receive Format and Frame Length
Bit 6: Bit 5: Bit 2: Bit 3: 1
CHR PE MP STOP
2345678 9
10 11 12
0000
START
8-bit data
STOP
0001
START
8-bit data
STOP STOP
0100
START
8-bit data
P STOP
0101
START
8-bit data
P STOP STOP
1000
START
7-bit data
STOP
1001
START
7-bit data
STOP STOP
1100
START
7-bit data
P STOP
1101
START
7-bit data
P STOP STOP
0 —1 0
START
8-bit data
MPB STOP
0 —1 1
START
8-bit data
MPB STOP STOP
1 —1 0
START
7-bit data
MPB STOP
1 —1 1
START
—: Don’t care bits.
Note:
START: Start bit
STOP: Stop bit
P: Parity bit
MPB: Multiprocessor bit
7-bit data
MPB STOP STOP
Clock: An internal clock generated by the on-chip baud rate generator or an external clock input
from the SCK pin can be selected as the SCI1 transmit/receive clock. The clock source is selected
by the C/A bit in the serial mode register (SMR1) and bits CKE1 and CKE0 in the serial control
register (SCR1) (table 12.9).
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