Epson TM-U950P - B/W Dot-matrix Printer Specification page 35

5) Notes on resetting the printer using the interface
The printer can be reset using interface pins 6 and 25 by changing the DIP switch setting (refer to
Section 3.3.3, DIP switch 2).
Signal Line
Pin 6 (DSR)
Pin 25 (INIT)
To reset the printer, the following requirements must be satisfied.
·
DC characteristics:
Input HIGH voltage
Input LOW voltage
Input HIGH current:
Input LOW current:
Input impedance:
· AC characteristics:
Minimum reset pulse width: T
·
When using pin 6 (DSR) (DIP switch 2-7 is ON):
·
NOTES: When a signal that does not satisfy the requirements above is input, printer operation is
not guaranteed. When a signal is input to pin 25 (INIT) at the TTL level, the
requirements above must also be satisfied. Although a signal is input to pin 6 (DSR) at
the TTL level, according to the DC characteristics described above, the operation is not
guaranteed and pin 6 cannot be controlled.
·
When pin 6 (DSR) and pin 25 (INIT) are open, the printer is operating.
EPSON
Table 2.1.1Reset Switching
DIP Switch
DSW 2-7: ON
DSW 2-8: ON
Table 2.1.2 Reset DC Characteristics
V +3 to +15 V
IH
V -15 to + -3 V
IL
I 5 mA (maximum)
IH
I -5.3 mA (maximum)
IL
R
IN
RS
TITLE
TM-U950/U950P
Specification
(STANDARD)
Reset Condition
MARK level input
SPACE or TTL-HIGH level input
Pin 6 (DSR)
3 KW (minimum)
1 ms (minimum)
SHEET
REVISION
A
Pin 25 (INIT)
+2 to +15 V
-15 to + 0.8 V
1 mA (maximum)
-2 mA (maximum)
NO.
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