15
MICRO ASYNC TO SYNC CONVERTER
Appendix B: Synchronous Port
Connections (Configured as DTE)
Pin
Name
Description
1
FG
Frame Ground; connected straight through to asynchronous
port
2
TXD
Transmit Data (from Converter); data output to synchronous
port
3
RXD
Receive Data (to Converter); data input from the synchronous
port; input to Converter’s power supply
4
RTS
Request to Send (from Converter); 4-bit delay from
asynchronous port (Converter waits 4 bits before dropping
RTS to the synchronous port; this facilitates use in a polling
environment)
5
CTS
Clear to Send (from Converter); connected straight through to
asynchronous port
6
DSR
Data Set Ready (to Converter); connected straight through to
asynchronous port
7
SG
Signal Ground; connected straight through to asynchronous
port
8
CD
Carrier Detect (to Converter); connected straight through to
asynchronous port
9
+DCV
Connected straight through to asynchronous port
10
-DCV
Connected straight through to asynchronous port
15
TXC
Transmit clock (to Converter); used to synchronize data
conversion from Converter to synchronous port
