Citizen Systems iDP-3540, 3541 user manual Data, Ack, Fault

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iDP-3540/41 User’s Manual

8-3. Description of Input / Output Signals

8-3-1. Input / Output Signals

a) Input / Output Signals

*DATA	: 8 bit parallel signal. (Positive logic)
*STB	: A strobe signal for reading in 8 bit data. (Negative logic)
*RESET	: A signal which resets the entire printer. (Negative logic, 1 ms or more)
b) Output Signals (From Printer)
*ACK	: This is a pulse signal for requesting 8 bit data, issued at the end of a BUSY
	signal. (Negative logic)
*BUSY	: This signal indicates that your printer is in a BUSY state.
	New data should be input when this signal is “LOU”. (Positive logic)
*FAULT	: When your printer is in an alarm state, this signal is “LOW”. At this time,
	all control circuits of your printer are interrupted. (Negative logic)

Note: An alarm condition occurs when the timing of the print head movement sensor is abnormal.

c) Power Source
*”H” Level	: H level out put for TTL level
*GND	: The common circuit ground.
*FRAME GND	: Connect the shield of interface cable to this.

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Contents User’s Manual LVD EMCImportant Safety Instructions Contents Slide Switch Setting Serial interface specifications only Introduction Basic Specifications Specifications Citizen Block Diagram External Appearance and parts Description 12/48 13/48 Preparation IDP-3540/41 User’s Manual Ribbon Cassette Installation 16/48 17/48 Input Buffer Back-up Function Input Buffer Back-upParallel Interface ACK FaultData 21/48 22/48 Serial Interface TTL DTR25/48 26/48 27/48 8V Busy TD Mark = -8V +8V Ready Space = +8V Current on Ready External Output Function Selection IDP-3540/41 User’s Manual RS-422A type only Function Print Control Functions SI0FH FF0CHSO0EH LF0AH CR0DHRS1EH 37/48 38/48 39/48 40/48 DEFAULT=20 42/48 Initial Setting Maintenance General CautionsCharacter Code Tables IDP-3540/41 User’s Manual Individual Country Character Codes External Dimensions IDP-3540/41 User’s Manual Model iDP3541