8.3 Description of Input/Output Signals
(1)Input/Output Signals
a)Input Signals (To Printer)
*DATA | : 8 bit parallel signal. (Positive logic) | ||||
| : A strobe signal for reading in 8 bit data. (Negative logic) | ||||
| *STB |
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*RESET | : A signal which resets the entire printer. (Negative logic. 1 ms or more) | ||||
b) Output Signals (From Printer) | |||||
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*ACK | : This is a pulse signal for requesting 8 bit data, issued at the end of a BUSY signal. | ||||
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| (Negative logic) |
*BUSY | : This signal indicates that your printer is in a BUSY state. New data should be input | ||||
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| when this signal is "LOW". (Positive logic) |
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*FAULT | : When your printer is in an alarm state, this signal is "LOW". At this time, all control | ||||
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| circuits of your printer are interrupted. (Negative logic) |
*PE | : When the paper is near its end, this signal is issued. (Positive logic) | ||||
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| Note: An alarm condition occurs when the timing of the print head movement sensor is abnormal. |
c) Power Source |
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*+5V DC | : The same +5V output as that of the power source which actuates the control circuits. | ||||
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| This should be less than 30 mA. |
*GND | : The common circuit ground. | ||||
*FRAME GND | : Equivalent to "case ground". | ||||
22 | CITIZEN |
