Interface - Canon DR-9080C Service Manual

VII. INTERFACE
When sending data from this unit to a
personal computer, the data is transmitted over an

interface.

This unit provides both SCSI-3 and
USB 2.0 interfaces.
1. SCSI-3
SCSI-3 (Small Computer System Interface-3)
is a Parallel Interface standard. This unit supports
Ultra SCSI and the data transfer rate between the
machine and the personal computer is up to 20
MB/sec.
Fig. 2-701 shows the data input/output
between the machine and the computer, when
connected with SCSI-3. Table 2-701 gives the
signal descriptions for the SCSI connector. The
connector numbers on the main CPU PCB are
J105 and J121.
PC
DB7-DB0, DBP
BSY
SEL
RST
C/D, MSG
I/O, REQ
ATN
AC
Fig. 2-701
COPYRIGHT © 2003 CANON ELECTRONICS INC.
Pin No.
14-25
35-37
39-40
DR-6080/
9080C
(J105/J121)
The asterisk "*"at the end of the signal name
denotes the signal is low-active.
byte + parity bit = 9 signals) and control signals (9
signals) for a total of 18 lines.
CANON DR-6080/9080C REV.0 SEPT. 2003
CHAPTER 2 FUNCTIONS & OPERATION
Signal
1-12 GND
13 OPEN
GND
26 DB0*
27 DB1*
28 DB2*
29 DB3*
30 DB4*
31 DB5*
32 DB6*
33 DB7*
34 DBP*
GND
38 TERMPWR
GND
41 ATN*
42 GND
43 BSY*
44 ACK*
45 RST*
46 MSG*
47 SEL*
48 C/D*
49 REQ*
50 I/O*
Table. 2-701
The SCSI bus is made up of data signals (1
Remarks
(Ground)
(No-connection)
(Ground)
(Data Bit 0)
(Data Bit 1)
(Data Bit 2)
(Data Bit 3)
(Data Bit 4)
(Data Bit 5)
(Data Bit 6)
(Data Bit 7)
(Odd Parity Data
Bit)
(Ground)
(Termination
Power)
(Ground)
(Attention)
(Ground)
(Busy)
(Acknowledge)
(Reset)
(Message)
(Select)
(Control/Data)
(Request)
(Input/Output)
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