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1. Specifications
As shown in figure 1, asynchronous serial data transmission is performed using channel 1 (ch1) of
the SCI module of the SH7145F. In this task example 3 bytes of serial data are received by the
SH7145, and the receive data is then transmitted. The communication format is 192,000 bps, 8-
bit, one stop bit, and no parity.
Figure 1 Asynchronous Serial Data Transmission/Reception by SH7145
Table 1
Asynchronous Serial Data Transmission Format
Format Item
Bit rate
Data length
Parity bit
Stop bit
Serial/parallel conversion format
REJ06B0357-0100O/Rev.1.00
3.3 V
SH7145
SCI
(ch1)
Asynchronous Serial Data Transmission/Reception
TXD
RXD
Setting
19200 bps
8 bits
No
1 bit
LSB first
March 2004
Serial data
transfer
3.3 V
target MCU
RXD
TXD
SH7145F
Page 2 of 17
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