Epson Expression 800 User Manual - Page 77

Specifications, Pin No., Signal, Description

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SCSI pin assignments Pin No. 1-12, 14-25, 35-37, 39, 40, 42 13 26-33 34 38 41 43 44 45 46 47 48 49 50 Signal GND I/O Description - Ground NC - Not used DB0-DB7 I/O Data bus 0-7 DBP I/O Data bus parity TERMPWR - Terminator power ATN I Attention BSY I/O Busy ACK I Acknowledge RST I Reset MSG O Message SEL I/O Select C/D O Command/data REQ O Request I/O O Input/output Specifications Page 77

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Specifications
Page 77
SCSI pin
assignments
Pin No.
Signal
I/O
Description
1-12, 14-25, 35-37,
39, 40, 42
GND
—
Ground
13
NC
—
Not used
26-33
DB0-DB7
I/O
Data bus 0-7
34
DBP
I/O
Data bus parity
38
TERMPWR
—
Terminator power
41
ATN
I
Attention
43
BSY
I/O
Busy
44
ACK
I
Acknowledge
45
RST
I
Reset
46
MSG
O
Message
47
SEL
I/O
Select
48
C/D
O
Command/data
49
REQ
O
Request
50
I/O
O
Input/output