SH7055S Datasheet, PDF (523/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Transmit/Receive Formats: Table 15.10 shows the 12 communication formats that can be
selected in asynchronous mode. The format is selected by settings in the serial mode register
(SMR).
Table 15.10 Serial Communication Formats (Asynchronous Mode)
SMR Bits
CHR PE MP STOP
Serial Transmit/Receive Format and Frame Length
1 2345678 9
10 11 12
0 00 0
START
8-bit data
STOP
0 00 1
START
8-bit data
STOP STOP
0 10 0
START
8-bit data
P STOP
0 10 1
START
8-bit data
P STOP STOP
1 00 0
START
7-bit data
STOP
1 00 1
START
7-bit data
STOP STOP
1 10 0
START
7-bit data
P STOP
1 10 1
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.
Notes: 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 SCI transmit/receive clock. The clock source is selected
by the C/A bit in the serial mode register (SMR) and bits CKE1 and CKE0 in the serial control
register (SCR) (table 15.9).
When an external clock is input at the SCK pin, it must have a frequency equal to 16 times the
desired bit rate.
Rev.2.0, 07/03, page 485 of 960