GL843 datasheet(37/84 Pages) GENESYS

37 / 84 page

GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x

Page 37

Offset 32h ……..……………………………………..…………..….…..…….…. Default value = 8’h00

ENDPIXEL15 ENDPIXEL14 ENDPIXEL13 ENDPIXEL12 ENDPIXEL11 ENDPIXEL10

ENDPIXEL9 ENDPIXEL8

R/W

7-0 ENDPIXEL[15:8] The end pixel position of horizontal line (unit : pixel count).

ENDPIXEL=(TGW+2*TGSHLD)+end pixels number (count from CCD pixel 0)

Note: 1.It cannot be programmed to logic zero.

2.If the DPI9600 control bit is set to “1”,the STRPIXEL is doubled.

Offset 33h ……..……………………………………..…………..….…..…….…. Default value = 8’h00

ENDPIXEL7 ENDPIXEL6 ENDPIXEL5 ENDPIXEL4 ENDPIXEL3 ENDPIXEL2 ENDPIXEL1 ENDPIXEL0

R/W

7-0 ENDPIXEL[7:0] The end pixel position of horizontal line (unit : pixel count).

ENDPIXEL=(TGW+2*TGSHLD)+end pixels number (count from CCD pixel 0)

Note: 1.It cannot be programmed to logic zero.

2.If the DPI9600 control bit is set to “1”,the STRPIXEL is doubled.

Offset 34h ……..……………………………………..…………..….…..…….…. Default value = 8’h00

DUMMY7

DUMMY6

DUMMY5

DUMMY4

DUMMY3

DUMMY2

DUMMY1

DUMMY0

R/W

7-0 DUMMY[7:0]

The CCD dummy & optical black pixels number (unit : pixel count).

Note: It cannot be programmed to logic zero.

Reg30,31,32,33 and 34 setting rule.

TGSHLD(Reg1D)

RGW(Reg17)

TGSHLD(Reg1D)

CCD TG

CCD clock

CCD pixel no: N-1

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.

Offset 35h ……..…..……………………..………..….………..….…..…….…. Default value = 8’h00

MAXWD24 MAXWD23 MAXWD22 MAXWD21 MAXWD20 MAXWD19 MAXWD18 MAXWD17

R/W

7-0 MAXWD[24:17] Maximum word size per line for ASIC estimation. The unit is 2 words.

If available buffer size < MAXWD, then “buffer full” state will be set. The

scanner execute backtracking.

GL843 Datasheet(PDF) 37 Page - GENESYS LOGIC

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