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. |
CITIZEN | 20/48 |
