Star TSP400 Installation Manual page 36

Pin no Signal name
1 STROBE
2-9 DATA 1~8
10 ACK
11 BUSY
12 PAPER OUT
13 SELECTED
14-15 N/C
16 SIGNAL GND
17 CHASSIS GND
18 +5V
19-30 TWISTED
PAIR RETURN
31 RESET
32 ERROR
33 EXT GND
34-35 N/C
36 –
Direction Function
Strobe pulse for data read. Usually HIGH;
IN
goes LOW to trigger data read.
Parallel data lines for eight-bit data. HIGH
IN
is "1"; LOW is "0".
Printer outputs this pulse for approxi-
OUT
mately 9µs to indicate that data read is
completed. Printer becomes ready to
receive new data at the moment the ACK
pulse ends.
DC-level signal indicating printer's current
OUT
status. LOW indicates that printer is ready to
receive the next data; HIGH indicates that
printer is unable to receive. The printer holds
this signal "HIGH" during any of the follow-
ing conditions.
1 While data entry is in progress
2 While printer is offline 3 While error
condition exists
OUT DC-level signal indicating whether printer
has paper. The signal stays LOW while paper
is present; it goes HIGH to indicate that paper
has run out.
OUT DC-level signal; stays HIGH while printer is
online.
Not used
Signal ground
Printer-frame ground
Outputs +5V (Max. 50mA)
Return pins for various signals. Each pin is
connected to the corresponding signal line by
twisted pair line.
IN LOW level causes printer to reset its control
circuitry and return to its initial state.
OUT Goes LOW to indicate that printer is unable to
print.
Ground terminal for external connection
Not used
– Fixed "HIGH" at printer side
– 33 –