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GL843 Datasheet(PDF) 26 Page - GENESYS LOGIC

Part # GL843
Description  High Speed USB 2.0 With ADF 2-in-1 Scanner Controller
PDF  84 Pages
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Manufacturer  GENESYS [GENESYS LOGIC]
Direct Link  http://www.genesyslogic.com
Logo GENESYS - GENESYS LOGIC

GL843 Datasheet(HTML) 26 Page - GENESYS LOGIC

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GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x
©2000-2006 Genesys Logic Inc. - All rights reserved.
Page 26
1
Enable RS232 interface for special application and the specific GPIOs are
defined to implement RS232 protocol.
1-0 BAUDRAT[1:0] Set boud rate of RS232.
00
2400bps.
01
4800bps.
10
9600bps.
11
19200bps.
Offset 0Bh …………………………………………..…………..……..………. Default value = 8’h00
CLKSET2
CLKSET1
CLKSET0
RFHDIS
ENBDRAM DRAMSEL2 DRAMSEL1 DRAMSEL0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-5 CLKSET[2:0]
To select the system clock frequency.
000
24MHz.
001
30MHz.
010
40MHz.
011
48MHz.
100 60MHz.
101 Reserved.
110 Reserved.
111 Reserved.
4 RFHDIS
0
Enable auto-refresh mode for SDRAM.
1
Enable self-refresh mode for SDRAM.
3 ENBDRAM
A rising edge from low to high: to start power on sequence of SDRAM.
2-0 DRAMSEL[2:0] Select the SDRAM size.
000
Reserved.
001
16M bit.
010
64M bit.
011
128M bit.
100 256M bit.
101 512M bit.
110
Reserved.
111
Reserved.
Offset 0Ch …………………………………………..…………..……..………. Default value = 8’h00
SWSH4
SWSH3
SWSH2
SWSH1
SWSH0
CCDLMT2
CCDLMT1
CCDLMT0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-3 SWSH [4:0]
To set the distance from SEL3 to TG for NEC8884.
the width
s
SWSH[4:2]*2
TGSTIME
2-0 CCDLMT[2:0]
To set the lines count which is synchronized for CCD timing(like NEC8884).
Offset 0Dh
JAMPCMD DOCCMD
CCDCMD
FULLSTP
SEND
CLRMCNT
CLRDOCJM
CLRLNCNT
W
W
W
W
W
W
W
W
Command: Scanner command.
7 JAMPCMD
To control jamp when scanner is working on ADF.



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