Confidential
EPSON
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SHEET
REVISION
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SHEET
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F
TM-T90
Specification
(STANDARD)
21 20
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 k
Ω
(minimum)