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SH7145F
Asynchronous Serial Data Transmission/Reception
REJ06B0357-0100O/Rev.1.00 March 2004 Page 2 of 17
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.
SH7145
Serial data
transfer
target MCU
TXD
RXD
SCI
(ch1)
3.3 V 3.3 V
TXD
RXD
Figure 1 Asynchronous Serial Data Transmission/Reception by SH7145
Table 1 Asynchronous Serial Data Transmission Format
Format Item Setting
Bit rate 19200 bps
Data length 8 bits
Parity bit No
Stop bit 1 bit
Serial/parallel conversion format LSB first