Epson TM-T90 - Page 38

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TM-T90
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2.1.1.6 Notes on resetting the printer using the interface
The printer can be reset using interface pins 6 and 25 by changing the memory switch setting.
Table 2.1.3 Reset Switching
Signal Line Memory Switch Reset Condition
Pin 6 (DSR) Msw 1-7: ON MARK level input
Pin 25 (INIT) Msw 1-8: ON SPACE or TTL-HIGH level input
To reset the printer, the following requirements must be satisfied.
• DC characteristics:
Table 2.1.4 Reset DC Characteristics
Pin 6 (DSR) Pin 25 (INIT)
Reset active voltage V
A
-15 to -3 V +2 to +15 V
Reset negative voltage V
N
+3 to +15 V -15 to + 0.8 V
Reset active current I
A
-5.3 mA (maximum) 1 mA (maximum)
Reset negative current I
N
-5.0 mA (maximum) -2 mA (maximum)
Input impedance R
IN
3 kΩ (minimum)