GL843 GENESYS [GENESYS LOGIC], GL843 Datasheet - Page 24

• Manufacturer Part Number: GL843
• Description: High Speed USB 2.0 With ADF 2-in-1 Scanner Controller
• Manufacturer: GENESYS [GENESYS LOGIC]

©2000-2006 Genesys Logic Inc. - All rights reserved.
Offset 07h ……………………………………………..…………..……..………. Default value = 8’h00
Offset 08h ……………………………………………..…………..……..………. Default value = 8’h00
2-0 OPTEST[2:0]
4 PWRBIT
3 GAIN4
2 FASTDMA
7 RESERVED
6 DECFLAG
5 GMMFFR
7 LAMPSIM
6 CCDCTL
5 DRAMCTL
4 MOVCTL
3 SRAMSEL
1 DMASEL
0 DMARDWR
Note: Please do not write other values than 00H into this register under normal condition.
LAMPSIM
R/W
X
X
GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x
DECFLAG GMMFFR GMMFFG
CCDCTL
R/W
R/W
111 16 clocks/pixel.
The hardware will reset this bit during power-on initial process. It can be set and
checked by S/W to know if the power had been turned off or not.
Default is reset.
0 Digital shading gain=8 times system.
1 Digital shading gain=4 times system.
Note: If you want to get more precise image quality,you can set GAIN4 bit.
Select ASIC operation type.
000 Set normal mode to capture AFE image.
001 Set SDRAM bank testing and power-on moving testing for ASIC simulation
010 Pixel count pattern for ASIC image test.
011 Line count pattern for ASIC image test.
100 Counter and adder test for ASIC simulation test.
101 Reserved.
110 Reserved.
111 Reserved.
-
0 Select gamma table in increment type
1 Select gamma table in decrement type.
0 This function is not enabled
1 Gamma table address FFH of red channel is a special value.
for timer simulation
1 DMA access for SRA
for CCD timing control
for SRAM & DRAM access control
for motor driver IC style control
0 DMA access for DRAM.
0 4clocks/access,that is to say 4clocks/16bits or 4clocks/8bits for
1 2clocks/access,that is to say 2clocks/16bits or 2clocks/8bits for
0 MPU access DRAM under command mode.
1 DMA access DRAM under command mode.
0 DMA read DRAM under command mode.
DMA access.
DMA access.
Line art scanning : 1 bit image with gamma correction
Color scanning : 24 bits image with gamma correction
Gray scanning : 8 bits image with gamma correction
Line art scanning : 1 bit image with gamma correction
DRAMCTL
R/W
R/W
MOVCTL
R/W
R/W
16 bits image without gamma correction
48 bits image without gamma correction
GMMFFB
RAMSEL
R/W
R/W
GMMZR
FASTDMA
R/W
R/W
GMMZG
DMASEL
R/W
R/W
GMMZB
DMARDWR
Page 24
R/W
R/W