Epson ActionPrinter 4500 User Manual - Page 244

Interface Specifications, Pin Assignments for the Parallel Interface

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Interface Specifications Your printer is equipped with an 8-bit parallel interface. For specifications on optional interfaces, refer to their manuals. Pin Assignments for the Parallel Interface Connector pin assignments and a description of their respective interface signals are shown in the following table. Signal Pin 1 2 3 4 5 6 7 8 9 10 11 12 Return Pin 19 20 21 22 23 24 25 26 27 28 29 30 Signal STROBE DATA 1 DATA 2 DATA 3 DATA 4 DATA 5 DATA 6 DATA 7 DATA 8 ACKNLG BUSY PE Direction IN IN IN IN IN IN IN IN IN OUT OUT OUT Description STROBE pulse to read data. Pulse width must be more than 0.5 microseconds at the receiving terminal. These signals represent information of the 1st to 8th bits of parallel data, respectively. Each signal is at HIGH level when data is logical 1 and LOW when it is logical 0. About an 11 -microsecond pulse. LOW indicates that data has been received and that the printer is ready to accept more data. 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 4) During printer-error state A HIGH signal indicates that the printer i: out of paper. 8-8 Technical Specifications

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Interface Specifications
Your printer is equipped with an 8-bit parallel interface. For
specifications on optional interfaces, refer to their manuals.
Pin Assignments for the Parallel Interface
Connector pin assignments and a description of their respective
interface signals are shown in the following table.
Signal
Pin
1
2
20
DATA 1
3
21
DATA 2
4
22
DATA 3
5
23
DATA 4
6
24
DATA 5
7
25
DATA 6
8
26
DATA 7
9
27
DATA 8
10
28
ACKNLG
11
12
29
BUSY
OUT
30
PE
OUT
Return
Pin
19
Signal
STROBE
Direction
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
Description
STROBE pulse to read data. Pulse width
must be more than 0.5 microseconds at
the receiving terminal.
These signals represent information of the
1st to 8th bits of parallel data,
respectively. Each signal is at HIGH level
when data is logical 1 and LOW when it is
logical 0.
About an 11 -microsecond pulse. LOW
indicates that data has been received and
that the printer is ready to accept more
data.
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
4) During printer-error state
A HIGH signal indicates that the printer i:
out of paper.
8-8
Technical Specifications