GL842 datasheet(32/64 Pages) GENESYS

32 / 64 page

GL842 USB 2.0 2-in-1 Scanner Controller

Page 32

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

ENDPIXEL7 ENDPIXEL6 ENDPIXEL5 ENDPIXEL4 ENDPIXEL3 ENDPIXEL2 ENDPIXEL1 ENDPIXEL0

R/W

7-0 ENDPIXEL[7:0] To set the end pixel position (unit : pixel count).

ENDPIXEL=(TGW+2*TGSHLD)+End pixels number.

Note: Can’t be programmed to logic zero.

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

DUMMY7 DUMMY6 DUMMY5 DUMMY4 DUMMY3 DUMMY2 DUMMY1 DUMMY0

R/W

7-0 DUMMY[7:0]

To set the CCD dummy & optical black pixels position (unit : pixel count).

Note: 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 begin 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.

Note: Can’t be programmed to logic zero.

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

MAXWD19 MAXWD18 MAXWD17 MAXWD16

R/W

7-4 RESERVED

3-0 MAXWD[19:16] To set maximum word size per line for ASIC estimation.

If usable buffer size < MAXWD,then buffer is full.The scanner execute forward

And Backward moving.

Offset 36h …….……..……………………..………..….………..….…..…….…. Default value = 8’h00

MAXWD15 MAXWD14 MAXWD13 MAXWD12 MAXWD11 MAXWD10 MAXWD9 MAXWD8

R/W

7-0 MAXWD[15:8] To set maximum word size per line for ASIC estimation.

If usable buffer size < MAXWD,then buffer is full.The scanner execute forward

And Backward moving.

GL842 Datasheet(PDF) 32 Page - GENESYS LOGIC