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A.4.1.2
Control interface signals
Card
(1)
Transmitted data (TXD)
This signal is the response and acknowledge for the command sent on the R/D line.
(2)
Received data (RXD)
This line sends the command and acknowledge for a response.
(3)
Send request (RTS): Active Low Signal
This line sends a request to send a respose and acknowledge for the command.
(4)
Transmission enabled (CTS): Active Low Signal
This line sends an acceptance of RTS signal.
(5)
Terminal ready (DTR): Active Low Signal
This signal indicates that the scanner is ready for transmission and reception. This signal is set to off when
the scanner is turned off, when the scanner is initially checked after power-on, when a fault is detected.
(6)
Controller ready (DSR): Active Low Signal
This signal indicates that the host computer is ready for transmission and reception.
TXD
RXD
R T S
C T S
D T R
DSR
Figure A.4.1 Controlinterface signal lines
A.4 Third Party Slot
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Appendix A-115
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