3980xpi Users Manual - Data I/O Corporation
3980xpi Users Manual - Data I/O Corporation
3980xpi Users Manual - Data I/O Corporation
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Setting Up<br />
Pin Functions<br />
The function of the pins on the Terminal and Remote ports when connected to<br />
DCE and DTE equipment are described in the following table.<br />
Type Pin Function Description<br />
DTE 1 Ground Provides a safety ground connection.<br />
2 Transmit <strong>Data</strong> Carries the transmitted data.<br />
3 Receive <strong>Data</strong> Carries the received data.<br />
4 Request to Send Held high by the programmer.<br />
5* Clear to Send A high enables the programmer to transmit data.<br />
(Used for hardware handshaking.) A low inhibits<br />
data transmission from the programmer.<br />
6* <strong>Data</strong> Set Ready Held high when the remote source is ready to<br />
send or receive data. A low inhibits data<br />
transmission from the programmer.<br />
7 Signal Ground Provides a reference ground for all signals on the<br />
cable.<br />
8* <strong>Data</strong> Carrier Held high when the modem detects a carrier. A<br />
Detect<br />
low inhibits the programmer from transmitting<br />
data.<br />
9-19 No Connection —<br />
20 <strong>Data</strong> Terminal Pulled high by the programmer to indicate it is<br />
Ready<br />
ready to receive data. Pulled low to signal the<br />
remote computer to stop sending data. (Used for<br />
hardware handshaking.)<br />
21-25 No Connection —<br />
DCE 1 Ground Provides a safety ground connection.<br />
2 Receive <strong>Data</strong> Carries the received data from the DTE device to<br />
the programmer.<br />
3 Transmit <strong>Data</strong> Carries the transmitted data from the<br />
programmer to the DTE device.<br />
4 Request to Send Held high by the programmer.<br />
5 Clear to Send A high on this line from the programmer means<br />
that it is ready to receive data. (Used for<br />
hardware handshaking.)<br />
6 <strong>Data</strong> Set Ready Held high when the programmer is ready to<br />
transfer data.<br />
7 Signal Ground Provides a reference ground for all signals on the<br />
cable.<br />
8 <strong>Data</strong> Carrier Held high by the programmer.<br />
9-19 No Connection —<br />
20* <strong>Data</strong> Terminal A high enables the programmer to transmit data.<br />
(Used for hardware handshaking.) A low inhibits<br />
data transmission from the programmer.<br />
21-25 No connection —<br />
* If these lines are not connected, the programmer will consider them high and will function<br />
normally.<br />
2-10 <strong>3980xpi</strong>/3980/3900/2900 User <strong>Manual</strong>
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