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3.11 Connector Pin Assignment and Descriptions
Signal
Return
Pin No.
Pin No.
Signal
Direction
Description
1
19
STROBE
In
STROBE signal reads data signal in.
Pulse width must be more than 1
/J.S
at
receiving terminal. The signal level is
normally "high". Data signal is read in
when STROBE is "low".
2
20
DATA 1
In
Each of Data 1 to 8 signals represents
3
21
DATA 2
In
the 1 st to 8th bits of parallel data respec-
4
22
DATA 3
In
tively. Signal is "high" when the data is
5
23
DATA 4
In
logical "1", and "low" when logical "0".
6
24
DATA 5
In
7
25
DATA 6
In
8
26
DATA 7
In
9
27
DATA 8
In
10
28
ACKNLG
Out
Nominal pulse width is approximately
5.5
/J.S.
Its "low': state indicates that data
has been received and the printer is
ready to accept additional data.
11
29
BUSY
Out
A "high" state of this signal indicates
that the printer cannot receive data. The
signal is "high" under any of the follow-
ing conditions:
1. During data entry.
2. During printing operation.
3. In "off-line" state.
4. During printer error status.
Connector Pin Assignment and Descriptions of Interface Signals (Part 1 of 3)
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