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WA_DEV_W218_PTS_002 Rev 005 Page 41 of 109
Product Technical Specification &
Customer Design Guidelines
V24/CMOS possible design
Customer application
( DTE )
WISMO218
( DCE )
ON/~OFF
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
37
39
40
38
GND
Rx
RTS
CTS
GND
Tx
41
42
~CT107/DSR
44
~CT108/DTR
~CT109/DCD
~CT125/RI45
43 DCD
RI
DSR
DTR
Figure 8. Example of V24/CMOS Serial Link Implementation for 2-wire UART
Customer application
( DTE )
WISMO218
( DCE )
ON/~OFF
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
37
39
40
38
GND
Rx
RTS
CTS
GND
Tx
41
42
~CT107/DSR
44
~CT108/DTR
~CT109/DCD
~CT125/RI45
43 DCD
RI
DSR
DTR
Figure 9. Example of V24/CMOS Serial Link Implementation for 4-wire UART