GL843 datasheet(30/84 Pages) GENESYS

30 / 84 page

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

Page 30

Speed 4: four CCD clock per system pixel time in shifting dummy lines.

4 CKTOGGLE

One cycle per pixel.

Half cycle per pixel for CCD clock 1 & 2.

3-2 CKDELAY[1:0] 00

No delay

Delay one system clock for CCD Clock 1/2.

Delay two systems clock for CCD Clock 1/2.

Delay three systems clock for CCD Clock 1/2.

1-0 CKSEL[1:0]

Speed 1: one CCD clock per system pixel time in capturing image.

Speed 2: two CCD clock per system pixel time in capturing image.

Speed 3: three CCD clock per system pixel time in capturing image.

Speed 4: four CCD clock per system pixel time in capturing image.

Note: Speed limitation of CCD clock in different scanning modes:

1. SCANMOD=0,1 : 12 clocks/pixel

a. toggle CCD : supports speed 1,2,3,4.

b. non-toggle CCD : supports speed 1,2,3.

2. SCANMOD=2

: Reserved.

3. SCANMOD=3

: Reserved.

4. SCANMOD=4

: Reserved.

5. SCANMOD=5

: Reserved.

6. SCANMOD=6

: 18 clocks/pixel

a. toggle CCD : supports speed 1,2,3.

b. non-toggle CCD : supports speed 1,2,3,4.

7. SCANMOD=7

: 16 clocks/pixel

a. toggle CCD : supports speed up 1,2,4.

b. non-toggle CCD : supports speed 1,2,4.

Note: Toggle CCD à

CCD which can output one pixel in one half cycle of CCD clock.

Non-toggle CCD à CCD which always output one pixel in one CCD clock cycle.

Offset 19h ……………………………………………..…………….…….……. Default value = 8’h00

EXPDMY7 EXPDMY6 EXPDMY5 EXPDMY4 EXPDMY3 EXPDMY2 EXPDMY1 EXPDMY0

R/W

7-0 EXPDMY[7:0] To set exposure time of dummy lines (unit = 256 pixels time) or CIS LED

turn-on tme.

CIS SP

CIS LED

EXPDMY for turn on

EXPR/EXPG/EXPB for turn off

Note: It cannot be programmed to logic zero.

Offset 1Ah ……..……………………………………..…………..……………. Default value = 8’h00

TGLSW2

TGLSW1

MANUAL3 MANUAL1

CK4INV

CK3INV

LINECLP

R/W

7 TGLSW2

Set CCD SW2 output.

TGLSW1

Set CCD SW1 output.

5 MANUAL3

CCD Clock 3,Clock4 automatic output.

CCD Clock 3,Clock4 manual output.

4 MANUAL1

CCD Clock 1,Clock2 automatic output.

CCD Clock 1,Clock2 manual output.

GL843 Datasheet(PDF) 30 Page - GENESYS LOGIC

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