SH7729R Datasheet, PDF (546/855 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

Transmit/Receive Formats: Table 15.11 lists the 12 communication formats that can be selected
in asynchronous mode. The format is selected by settings in the serial mode register (SCSMR).
Table 15.11 Serial Communication Formats (Asynchronous Mode)
SCSMR Bits
CHR PE MP STOP 1
Serial Transmit/Receive Format and Frame Length
23456789
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
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 (SCSMR) and bits CKE1 and CKE0 in the serial control
register (SCSCR) (table 15.10).
When an external clock is input at the SCK pin, it must have a frequency equal to 16 times the
desired bit rate.
Rev. 5.0, 09/03, page 500 of 806