Epson ActionScanner II Manuel - Sayfa 4
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EPSON ACTIONSCANNER II
SCSI Specifications
Interface type:
ANSI X3.131-1986 standard
Function:
The following functions are included.
BUS FREE phase
ARBITRATION 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
ATTENTION condition
RESET condition
Electrical standard:
As per ANSI X3.131-1986
ID Setting:
Selectable from 0 to 7 with the rotary switch.
Connector type:
25/50-pin connectors
Connector pin arrangement:
50 pin
25
50
25 pin
1 3
2 5
ActionScanner II-4
Signal pin assignments
The direction of signals is as viewed from the scanner.
Signal
GND
NC
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DBP
TERMPWR
ATN
BSY
ACK
RST
MSG
SEL
C/D
REQ
I/O
Initialization
The scanner can be initialized (returned to a fixed set of
conditions) in the following ways.
Hardware initialization:
When the power is turned on.
When the scanner receives an INIT signal at the parallel interface (pin 31
goes low).
1
When the scanner receives a SCSI Reset signal at the SCSI interface.
When you push the
Software initialization:
When the software command ESC @ (initialize the scanner) is received.
26
When the SCSI Bus Device Message is received.
1
1 4
10/95
I/O
Pin No.
50 pin
25 pin
−
1
12
7,9
−
14
25
14
−
35
37
16
−
39
40
18
42
24
13
I/O
26
8
I/O
27
21
I/O
28
22
I/O
29
10
I/O
30
23
I/O
31
11
I/O
32
12
I/O
33
13
I/O
34
20
38
25
I
41
17
I/O
43
6
I
44
5
I
45
4
O
46
2
I/O
47
19
O
48
15
O
49
1
O
50
3
RESET
button.
Description
Ground
Not connected
Data bus 0
Data bus 1
Data bus 2
Data bus 3
Data bus 4
Data bus 5
Data bus 6
Data bus 7
Data bus parity
Termination power
Attention
Busy
Acknowledge
Reset
Message
Select
Control/Data
Request
Input/Output
Scanners