
GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x
2000-2006 Genesys Logic Inc. - All rights reserved.
Page 33
If VALIDWORD < buffer condition, then the scanner will re-start to scan.
Following are the units of this register under various SDRAM size.
16M bits SDRAM
: 4k words
64M bits SDRAM
: 16k words
128M bits SDRAM : 32K words
256M bits SDRAM : 64K words
512M bits SDRAM : 128K words
Offset 21h
……
..
……………………………………
..
…………
..
…
.
…
..
……
.
…
. Default value = 8
’
h00
STEPNO7 STEPNO6 STEPNO5 STEPNO4 STEPNO3 STEPNO2 STEPNO1 STEPNO0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0 STEPNO[7:0]
Steps number of
“
table one
”
for the acceleration/deceleration of scanning moving.
Please refer to section 6.19 and the descriptions of Reg24 & Reg6A.
Note: 1.It cannot be programmed to logic zero.
2.it can be multiplied by2*
STEPTIM
Offset 22h
……
..
……………………………………
..
…………
..
…
.
…
..
……
.
…
. Default value = 8
’
h00
FWDSTEP7 FWDSTEP6 FWDSTEP5 FWDSTEP4 FWDSTEP3 FWDSTEP2 FWDSTEP1 FWDSTEP0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0
FWDSTEP[7:0]
Steps number for forward moving when buffer condition is met.
Please refer to section 6.19 and the descriptions of Reg20 & Reg24.
Note: 1.It cannot be programmed to logic zero.
2.it can be multiplied by2*
STEPTIM
Offset 23h
……
..
……………………………………
..
…………
..
…
.
…
..
……
.
…
. Default value = 8
’
h00
BWDSTEP7 BWDSTEP6 BWDSTEP5 BWDSTEP4 BWDSTEP3 BWDSTEP2 BWDSTEP1 BWDSTEP0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0
BWDSTEP[7:0]
Steps number for backward moving when image buffer is full.
Please refer to section 6.19 and the descriptions of Reg24.
Note: 1.It cannot be programmed to logic zero.
2.it can be multiplied by2*
STEPTIM
Offset 24h
……
..
……………………………………
..
…………
..
…
.
…
..
……
.
…
. Default value = 8
’
h00
FASTNO7 FASTNO6 FASTNO5 FASTNO4 FASTNO3 FASTNO2 FASTNO1 FASTNO0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0 FASTNO[7:0]
Steps number of
“
table two
”
for the acceleration/deceleration when image buffer
is full.
Please refer to section 6.19 and the descriptions of Reg20.
Note: It cannot be programmed to logic zero.