Epson ES-300GS Gebruikershandleiding - Pagina 3

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Epson ES-300GS Gebruikershandleiding
Signal p'n assignments
Pin No. pin
STROBE
19
20
2
3
21
4
22
DATA2
5
23
DATA3
6
2
4
DATA4
7
25
DATA5
8
26
DATA6
9
27
DATA7
10
28
ACKNLG
11
29
1 2 - 1 5 -
NC
16
18
NC
31
sure to use a twisted-pair cable for each signal, and to
complete the connection on the return side. These cables
should be shielded and the ground connected to the
chassis of the host computer and the scanner.
Scanners
to
STROBE pulse
read
in or sand out data.
more than 0.5
IN/OUT
These signals represent
IN/OUT
IN/OUT
when data is logical 1
and low when it is
logical 0.
Low indicates that data
has been received and
When this signal is
high, the scanner
cannot receive data.
The signal ia high:
2) during scanning
3) when the scanner is
4) when the scanner
has an enor
Not used
Scanner chassis ground
Not used
Twisted pair return
signal ground level
IN
When this signal level
scanner is reset to the
state when power is
usually High. The pulse
than 50 microseconds
Timing charts
The figures below show the timing for the bidirectional
parallel interface as viewed from the scanner.
OUT (from scanner to computer):
IN (from computer to scanner):

SCSI Interface Specifications

ANSI X3.131-1986 standard
Interface type:
The following functions are included:
BUS FREE phase
SELECTION/RESELECTION phase
COMMAND phase
(Logical Unit number is fixed to 0 and
command link function is not supported)
DATA phase
Data in phase
Data out phase
STATUS phase
MESSAGE phase
MESSAGE IN phase
MESSAGE OUT phase
RESET condition
Logic level:
Electrical standard: As per ANSI X3.131-1986 standard
Selectable from 0 to 7 with push buttons
ID setting
should not be selected; 9 selects the
(8
4/96
EPSON ES-300GS
EPSON ES-30OGS-3