GL843 GENESYS [GENESYS LOGIC], GL843 Datasheet - Page 33

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