B. Making Your Own Cable
UniSite-xpi User Manual
B-3
Switching Modes
As shown in Figure B-B-1, the switches on the programmer’s back panel
toggle each port between DTE and DCE. For now, do not change the
settings of the switches. For information on when to use the DTE/DCE
switches, see “Install the Base” on page 2-15.
Pin Functions When In
DCE Mode
The following table explains the function of the pins on the Terminal and
Remote ports when connected to DCE equipment.
Pin
Function
Description
1
Ground
Provides a safety ground connection.
2
Transmit Data
Carries the transmitted data.
3
Receive Data
Carries the received data.
4
Request to Send
This line is held high by the programmer.
5
*
*
If these lines are not connected, the programmer will consider them high and will
function normally
Clear to Send
A high on this line enables the
programmer to transmit data. (Used for
hardware handshaking.) A low inhibits
data transmission from the programmer.
6*
Data Set Ready
This line is held high when the remote
source is ready to send or receive data. A
low inhibits data transmission from the
programmer.
7
Signal Ground
Provides a reference ground for all signals
on the cable.
8*
Data Carrier
Detect
This line is held high when the modem
detects a carrier. A low on this line inhibits
the programmer from transmitting data.
9-19
No Connection
20
Data Terminal
Ready
This line is pulled high by the programmer
to indicate it is ready to receive data. This
line is pulled low to signal the remote
computer to stop sending data. (Used for
hardware handshaking.)
21-25
No Connection
Summary of Contents for UniSite-xpi
Page 2: ...981 0014 UniSite Programming System User Manual Also Covering Legacy UniSite Programmers ...
Page 72: ...2 Setup and Installation 2 42 UniSite xpi User Manual ...
Page 134: ...3 Getting Started 3 62 UniSite xpi User Manual ...
Page 238: ...5 Computer Remote Control 5 10 UniSite xpi User Manual ...
Page 296: ...6 Translation Formats 6 58 UniSite xpi User Manual ...
Page 402: ...Keep Current Subscription Service 6 Keep Current ...