gl848 Genesys Logic, gl848 Datasheet - Page 29

• Manufacturer Part Number: gl848
• Description: High Speed Usb 2.0 2-in-1 Scanner Controller With Fast Adf & Bus Power
• Manufacturer: Genesys Logic

©2000-2007 Genesys Logic Inc. - All rights reserved.
Offset 19h ……………………………………………..…………….…….……. Default value = 8’h00
Offset 1Ah ……..……………………………………..…………..……………. Default value = 8’h00
SW2SET
6-5 DCKSEL1 [1:0] 00 Speed 1: one CCD clock per system pixel time in shifting dummy lines.
1-0 CKSEL [1:0]
7-0 EXPDMY[7:0] To set exposure time of dummy lines (unit = 256 pixels time) or CIS LED
3-2 CKDELAY [1:0] 00 No delay
EXPDMY7 EXPDMY6 EXPDMY5 EXPDMY4 EXPDMY3 EXPDMY2 EXPDMY1 EXPDMY0
7 CNSET
4 CKTOGGLE
Note: Speed limitation of CCD clock in different scanning modes:
Note: Toggle CCD
CNSET
R/W
R/W
R/W
CIS SP
CIS LED
Note: It cannot be programmed to logic zero.
2. SCANMOD=2 : Reserved.
6. SCANMOD=6 : 18 clocks/pixel
7. SCANMOD=7 : 16 clocks/pixel
1. SCANMOD=0,1 : 12 clocks/pixel
3. SCANMOD=3 : Reserved.
4. SCANMOD=4 : Reserved.
5. SCANMOD=5 : Reserved.
Non-toggle CCD
GL848 High Speed USB2.0 2-in-1 Scanner Controller With Fast ADF
SW1SET
DCKSEL1 DCKSEL0
R/W
R/W
R/W
0 Select TG and clock to be non-Canon CIS style.
1 Select TG and clock to be Canon CIS style.
01 Speed 2: two CCD clock per system pixel time in shifting dummy lines.
10 Speed 3: three CCD clock per system pixel time in shifting dummy lines.
11 Speed 4: four CCD clock per system pixel time in shifting dummy lines.
0 One cycle per pixel.
1 Half cycle per pixel for CCD clock 1 & 2.
01 Delay one system clock for CCD Clock 1/2.
10 Delay two systems clock for CCD Clock 1/2.
11 Delay three systems clock for CCD Clock 1/2.
00 Speed 1: one CCD clock per system pixel time in capturing image.
01 Speed 2: two CCD clock per system pixel time in capturing image.
10 Speed 3: three CCD clock per system pixel time in capturing image.
11 Speed 4: four CCD clock per system pixel time in capturing image.
turn-on tme.
CCD which can output one pixel in one half cycle of CCD clock.
MANUAL3 MANUAL1
CCD which always output one pixel in one CCD clock cycle.
R/W
R/W
R/W
EXPDMY for turn on
CKTOGGLE
R/W
R/W
R/W
a. toggle CCD : supports speed 1,2,3,4.
b. non-toggle CCD : supports speed 1,2,3.
a. toggle CCD : supports speed 1,2,3.
b. non-toggle CCD : supports speed 1,2,3,4.
a. toggle CCD : supports speed up 1,2,4.
b. non-toggle CCD : supports speed 1,2,4.
CKDELAY1 CKDELAY0
CK4INV
R/W
R/W
R/W
EXPR/EXPG/EXPB for turn off
CK3INV
R/W
R/W
R/W
LINECLP
CKSEL1
R/W
R/W
R/W
CKSEL0
Page 29
R/W
R/W
X
X