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CHAPTER 2
2 - 28
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
C. CanoScan FB630U/FB636U Document Scanning Sequence
Figure 2-15
Table 2-2
Sequence
LED ON signal
Scanning unit drive motor (M1)
Interface signal
(Data1-8)
STUP
SCFW
SCAN
SCRTN
STBY
STBY
A4, 600 dpi, 100%, 24 bit color
Reverse
Scan command is received
Scanning unit position
Home position
Document
scan area
Home position sensor
detection signal
After a power on sequence is
completed until the scanner
receives a scan command
from the host computer.
To maintain the scanner ready
for scan.
After the scanner received a
scan command until
document scan starts.
To make a gate array setting,
buffer RAM initialization, etc.
as a preparation for scan.
After the scanning unit starts
moving forward until it reaches
the starting position
of the scan area specified by
the host computer.
To move the scanning unit with
a uniform speed to the vertical
scanning position specified by
the host computer.
After the scanning unit starts
scanning until all area
specified by the host
computer are scanned.
To perform various image
processing according to the
command from the host
computer and transmit the
image data during scan.
After the scanning unit starts
moving backward until it
returns to the home position.
To return the scanning unit to
the home position to ready for
the next scan.
Home position is determined by the
home position sensor.
STUP
(Setup)
SCFW
(Scanning unit
forward)
SCAN
(Document scan)
SCRTN
(Scanning unit
return)
STBY
(Standby)
Sequence
Purpose
Remarks
Содержание CanoScan FB 630P
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