SH7750_08 Datasheet, PDF (771/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 15 Serial Communication Interface (SCI)
In asynchronous mode, the SCI performs synchronization at the falling edge of the start bit in
reception. The SCI samples the data on the eighth pulse of a clock with a frequency of 16 times
the length of one bit, so that the transfer data is latched at the center of each bit.
1
Serial
data
(LSB)
0
D0 D1
D2 D3
D4 D5
(MSB)
Idle state (mark state)
1
D6 D7 0/1 1
1
Start
bit
1 bit
Transmit/receive data
7 or 8 bits
One unit of transfer data (character or frame)
Parity Stop
bit
bit(s)
1 bit,
1 or
or none 2 bits
Figure 15.5 Data Format in Asynchronous Communication
(Example with 8-Bit Data, Parity, Two Stop Bits)
Data Transfer Format
Table 15.10 shows the data transfer formats that can be used in asynchronous mode. Any of 12
transfer formats can be selected according to the SCSMR1 setting.
Rev.7.00 Oct. 10, 2008 Page 687 of 1074
REJ09B0366-0700