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Scanner Interface
Host machine
CONTROL (magnification)
•
Duplex reading specification
CONTROL A (Front-side)
CONTROL B (Back-side)
START
Document size report (*1)
IMAGE MODE
SENSE (front-side)
Read
Document size report (*2)
IMAGE MODE
SENSE (back-side)
Read
Figure A.3.5 Duplex read operation sequence (Automatic mode)
Appendix A-102
Scanner
Command processing
Normal status
Normal status (front-side reading)
Image status (front-side)
Document
reading
(front-side)
Read complete
(front-side)
Normal status
(back-side reading)
Image status (back-side)
Read complete (back-side)
Document feed start
Document
size
detection
VGATE ON
Document
reading
(back-side)
Storing in
V G A T E
RAM
OFF
VGATE
ON
Back-side data
transfer
Reading from RAM
VGATE
OFF
Document eject
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