gl845 Genesys Logic, gl845 Datasheet - Page 41

• Manufacturer Part Number: gl845
• Description: High Speed Usb 2.0 2-in-1 Scanner Controller With Adf
• Manufacturer: Genesys Logic

©2000-2007 Genesys Logic Inc. - All rights reserved.
Offset 33h ……..……………………………………..…………..….…..…….…. Default value = 8’h00
Offset 34h ……..……………………………………..…………..….…..…….…. Default value = 8’h00
Offset 35h ……..…..……………………..………..….………..….…..…….…. Default value = 8’h00
Offset 36h …….……..……………………..………..….………..….…..…….…. Default value = 8’h00
7-0 ENDPIXEL [7:0] The end pixel position of horizontal line (unit : pixel count).
7-0 DUMMY [7:0] The CCD dummy & optical black pixels number (unit : pixel count).
MAXWD25 MAXWD24 MAXWD23 MAXWD22 MAXWD21 MAXWD20 MAXWD19 MAXWD18
7-0 MAXWD [25:18] Maximum word size per line for ASIC estimation. The unit is 4 words.
MAXWD17 MAXWD16 MAXWD15 MAXWD14 MAXWD13 MAXWD12 MAXWD11 MAXWD10
7-0 MAXWD [17:10]
ENDPIXEL7 ENDPIXEL6 ENDPIXEL5 ENDPIXEL4 ENDPIXEL3 ENDPIXEL2 ENDPIXEL1 ENDPIXEL0
DUMMY7 DUMMY6 DUMMY5 DUMMY4 DUMMY3 DUMMY2 DUMMY1 DUMMY0
R/W
R/W
R/W
R/W
CCD TG
CCD clock
CCD pixel no: N-1
GL845 High Speed USB2.0 2-in-1 Scanner Controller With ADF
For example, start pixel is 65 ,end pixel is 100 and CCD dummy pixel is 64,
Then STRPIXEL = (TGW+2*TGSHLD) + 65.
ENDPIXEL= (TGW+2*TGSHLD) + 100.
DUMMY = (TGW+2*TGSHLD) + 64.
R/W
R/W
R/W
R/W
ENDPIXEL=(TGW+2*TGSHLD)+end pixels number (count from CCD pixel 0)
Note: 1.It cannot be programmed to logic zero.
ENDPIXEL=(TGW+2*TGSHLD)+end pixels number (count from CCD pixel 0)
Note: 1.It cannot be programmed to logic zero.
Note: It cannot be programmed to logic zero.
If available buffer size < MAXWD, then “buffer full” state will be set. The
scanner execute backtracking.
If available buffer size < MAXWD, then “buffer full” state will be set. The
Setting rule of Reg30,31,32,33 and 34.
Maximum word size per line for ASIC estimation. The unit is 4 words.
2.If the DPI9600 control bit is set to “1”,the STRPIXEL is doubled.
2.If the DPI9600 control bit is set to “1”,the STRPIXEL is doubled.
TGSHLD(Reg1D) RGW(Reg17)
R/W
R/W
N
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TGSHLD(Reg1D)
R/W
R/W
R/W
R/W
0
1
R/W
R/W
R/W
R/W
2
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R/W
R/W
R/W
R/W
3
4