GL646USB datasheet(30/44 Pages) GENESYS

30 / 44 page

GL646USB

Rev. 1.4

-29-

Programming registers are Reg5B/5C/5D/5E.

B6 : TCDFAST

:reserved.

B5 : DMYPIX

:reserved.

B4~0

:TGSHLD[4:0]

: to set CCD TG shoulder width.

7.22. Reg : 1EH

(Write)

Defalut : 20H

B7~4:WDTIME[3:0]

: to set watch-dog time.

Time : fast mode : WDTIME*2*(16K)*(Line-Priod).

normal mode: WDTIME*(16K)*(Line-Priod).

B3~0:LINESEL[3:0]

: to set CIS Vertical DPI or dummy lines.

CIS : LINESEL

full dpi.

1/2 dpi

1/3 dpi

1/4 dpi

…..

=15

1/16 dpi

CCD : LINESEL=0

no dummy line.

1 dummy line.

2 dummy lines.

3 dummy lines.

……

=15

15 dummy lines.

Note : CIS can be implemented dummy line by motor move method, not dummy lines.

7.23. Reg : 1FH

(Write)

Default : 00H

SCANFED[7:0]:

move to scanning position by table one.

7.24. Reg : 20H

(Write)

Default : 00H

BUFSEL[7:0] : to set buffer condition (unit = 2k word).

Scanner execute backward/forward moving whenever buffer full.

If MAXWD < buffer condition, then motor move forward to scan.

7.25. Reg : 21H

(Write)

Defalut : 00H

STEPNO[7:0]: to set table one steps number for forward slope curve of the acceleration/deceleration.

7.26. Reg : 22H

(Write)

Defalut : 00H

FWDSTEP[7:0] : to set steps number of the forward steps.

7.27. Reg : 23H

(Write)

Defalut : 00H

BWDSTEP[7:0] : to set steps number of the backward steps.

7.28. Reg : 24H

(Write)

Defalut : 00H

FASTNO[7:0]: to set table one steps number for backward slope curve of the acceleration/deceleration under scanning

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