GL841 USB 2.0 2-in-1 Scanner Controller
CCD TG
CCD CP/RS
18. Reg : 17H (Read/Write)
Default : 14H
B7~6:TGMODE[1:0]
B5~0:TGW[5:0]
Note: Can not be programmed to logic zero.
19. Reg : 18H (Read/Write)
Default : 00H
B7 : CNSET
: set : TG and clock set to Canon CIS style.
: reset: TG and clock is non-Canon CIS style.
B6~5 :DCKSEL : 00 one time CCD Clocks speed for dummy line.
01 two times CCD Clocks speed for dummy line.
10 three times CCD Clocks speed for dummy line.
11 four times CCD Clocks speed for dummy line.
B4 :CKTOGGLE : set : half cycle per pixel for CCD Clock 1/2.
: reset : one cycle per pixel
B3~2 :CKDELAY: 00 no delay
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.
B1~0 :CKSEL
: 00 one time CCD Clock speed for capture image.
01 two times CCD Clock speed for capture image.
10 three times CCD Clock speed for capture image.
11 four times CCD Clock speed for capture image.
Note : CCD Clock speed up limitation :
1. SCANMOD=0,1 : 12 clocks/pixel
2. SCANMOD=2 : reserved.
2. SCANMOD=3 : reserved.
3. SCANMOD=4 : 6 clocks/pixel
4. SCANMOD=5 : 15 clocks/pixel
: to set CCD TG mode.
00:without dummy line CCD TG type.
01:with reflectional document scanning type.
10:with transparency scanning type.
11:TGMODE=2 for simulation.
: to set CCD TG width.
a. toggle CCD : be able to speed up 1,2,3,4 times.
b. non-toggle CCD : be able to speed up 1,2,3 times.
a. toggle CCD : be able to speed up 1,2,3 times.
b. non-toggle CCD : can not speed up.
a.toggle CCD : be able to speed up 1,2,3,4 times.
b.non-toggle CCD : be able to speed up 1,2,3 times.
a.toggle CCD : be able to speed up 1,2,3,4 times.
b.non-toggle CCD : be able to speed up 1,2,3,4 times.
20. Reg : 19H (Read/Write)
Default : 00H
EXPDMY[7:0] : to set dummy line exposure time (unit = 256 pixels time) or CIS LED array turn-on time.
Note: the unit is pixel time.
5. SCANMOD=6 : 18 clocks/pixel
Version 1.7
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