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GL842 Datasheet(PDF) 22 Page - GENESYS LOGIC

Part # GL842
Description  USB 2.0 2-in-1 Scanner Controller
PDF  64 Pages
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Manufacturer  GENESYS [GENESYS LOGIC]
Direct Link  http://www.genesyslogic.com
Logo GENESYS - GENESYS LOGIC

GL842 Datasheet(HTML) 22 Page - GENESYS LOGIC

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GL842 USB 2.0 2-in-1 Scanner Controller
Genesys Logic Inc.—All rights reserved.
Page 22
Offset 0Ah …………………………………………..…………..……..………. Default value = 8’h00
X
X
X
X
X
X
X
SRAMBUF
X
X
X
X
X
X
X
R/W
7-1 RESERVED
-
0 SRAMBUF
0 To select external DRAM as the image buffer.
1 To select external SRAM as the image buffer.
Offset 0Dh
X
X
X
X
X
X
X
CLRLNCNT
X
X
X
X
X
X
X
W
Command: Scanner command.
7-1 RESERVED
-
0 CLRLNCNT
0 Don’t clear SCANCNT.
1 To clear SCANCNT(Reg4B,Reg4C,Reg4D).
Note: For each time scanning , you must clear SCANCNT before starting process.
Offset 0Eh
SCANRESET
W
Command: Scanner software reset.
It can initiate AISC system, including lamp and motor, control registers, internal circuit
and status, but not including tables in DRAM, like gamma table, shading table and
acceleration/deceleration table.
Note: In normal condition, it is unnecessary to reset scanner , unless the scanner is out of control.
Offset 0Fh
MOVE
W
Command: Motor moving.
Start motor forward/backward moving.
Offset 10h …………………………………………..…………..……..…………. Default value = 8’h00
EXPR15
EXPR14
EXPR13
EXPR12
EXPR11
EXPR10
EXPR9
EXPR8
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0 EXPR[15:8]
Red-LED array of CIS or Red channel TG of CCD exposure time setting.
Note: Can’t be programmed to logic zero.



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