Epson ES-1200C Pro PC, Руководство по обслуживанию

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Table 1-2. Pin Assignments for the Interface
Pin No. Signal Name
Description
1 STROBE I
The STROBE pulse used to read in or send out data. Pulse
width at the receiving terminal must exceed 0.5 p.s.
2-9 I/o
These signals convey the Ist to 8th bits of data.
A
HIGH
level indicates a logical 1; a LOW level indicates a logical O.
A pulse of 12 A LOW level indicates that data
10
ACKNLG o has been received and the scanner is ready to accept mom
data.
When this signal is HIGH, the scanner cannot receive data.
The signal
HIGH:
11 BUSY o
1 during data entry
scanning
the scanner is not ready
the scanner has an error
12-15 NC
—
Not used
16
—
Logic level
17
.
Scanner chassis ground
18 NC
.
Not used
—
Twisted-pair return signal
ground level
When this signal level becomes LOW, the scanner is reset
31 I
to its power on state. This level is usually HIGH. The pulse
width at the receiving terminal must be greater than 50
32
NC
—
Not used
33
—
Twisted-pair return signal ground level
34-35 NC
.
Not used
36 DIR
A LOW indicates that the direction is input.
Rev.