Parallel interface, Technical specifications 6-5 – First Alert ACTION T-1000 User Manual
Page 65
Technical Specifications
Parallel Interface
Connector pin assignments and a description of respective interface
signals are shown below and on the following page.
Signal Return
Pin
Pin
Signal
Direction Description
1
19
STROBE IN
STROBE pulse to read data in. Pulse
width must be more than 0.5 µs at the
receiving terminal.
2
20
DATA 1
IN
These signals represent information of
3
21
DATA 2
IN
the 1st to 8th bits of parallel data,
4
22
DATA 3
IN
respectively. Each signal
IS
at HIGH level
5
23
DATA 4
IN
when data is logical 1 and LOW when it
IS
6
24
DATA 5
IN
logical 0.
7
25
DATA 6
IN
8
26
DATA 7
IN
9
27
DATA 8
IN
10
28
ACKNLG
OUT
Approximately, 12 µ
S
pulse.
LOW indicates that data has been
received and that the printer is ready
to accept more data.
11
29
BUSY
OUT
A HIGH signal Indicates that the printer
cannot receive data. The signal goes
HIGH in the following cases:
1) During data entry (ea. char. time)
2) During printing
3) When off line
12
30 PE
OUT
4) During printer-error state.
A HIGH signal indicates that the printer is
out of paper.
13
Pulled up to +5 V through 3.3 K
resistance.
14
AUTO
FEED XT
IN
When this signal is LOW, the paper is
automatically fed 1 line after printing.
(The signal level can be fixed to this by
setting DIP switch 2-4 to ON.)
15 - NC
-
Unused.
Technical Specifications 6-5