Extended Interface With Hardware Handshake - HP 1652B Programming Reference Manual

Extended
Interface with
Hardware
Handshake
HP 16528/1653B
Programming Reference
With the extended interface, both the software and the hardware can
control the data flow between the HP 1652B/53B and the controller. This
allows you to have more control of data flow between devices. The
HP 1652B/53B uses the following connections on its RS-232C interface for
extended interface communication:
Pin 7 SGND (Signal Ground)
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Pm 2 TD (Transmit Data from HP 1652B/53B)
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Pin 3 RD (Receive Data into HP 1652B/53B)
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The additional lines you use depends on your controller's implementation
of the extended hardwire interface.
Pin 4 RTS (Request To Send) is an output from the
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HP 1652B/53B which can be used to control incoming data flow.
Pin 5 CTS (Clear To Send) is an input to the HP 1652B/53B
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which controls data flow from the HP 1652B/53B.
Pm 6 DSR (Data Set Ready) is an input to the HP 1652B/53B
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which controls data flow from the HP 1652B/53B within two bytes.
Pin 8 DCD (Data Carrier Detect) is an input to the HP
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two bytes.
Pin 20 DTR (Data Terminal Ready) is an output from the
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HP 1652B/53B which is enabled as long as the HP 1652B/53B is
turned on.
The TD (Transmit Data) line from the HP 1652B/53B must connect to the
RD (Receive Data) line on the controller. Likewise, the RD line from the
HP 1652B/53B must connect to the TD line on the controller.
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