HD6417706 Datasheet, PDF (421/709 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

Transmit/Receive Formats: Table 14.10 lists the 11 communication formats that can be selected
in the asynchronous mode. The format is selected by settings in the SCSMR.
Table 14.10 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
Legend
— : Don't care
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 SCK0 pin can be selected as the SCI transmit/receive clock. The clock source is selected
by the C/A bit in SCSMR and bits CKE1 and CKE0 in the SCSCR (table 14.9).
When an external clock is input on the SCK0 pin, it must have a frequency equal to 16 times the
desired bit rate.
When the SCI operates on an internal clock, it can output a clock signal on the SCK0 pin. The
frequency of this output clock is equal to the bit rate. The phase is aligned as in figure 14.6 so that
the rising edge of the clock occurs at the center of each transmit data bit.
Rev. 4.00, 03/04, page 375 of 660