gl846 Genesys Logic, gl846 Datasheet - Page 30

• Manufacturer Part Number: gl846
• Description: High Speed Usb 2.0 2-in-1 Scanner Controller With Fast Adf
• Manufacturer: Genesys Logic

©2000-2007 Genesys Logic Inc. - All rights reserved.
Offset 0Bh …………………………………………..…………..……..………. Default value = 8’h00
Offset 0Ch …………………………………………..…………..……..………. Default value = 8’h00
Offset 0Dh
1-0 BAUDRAT [1:0] Set boud rate of RS232.
7-5 CLKSET [2:0] To select the system clock frequency.
7-4 Reserved
2-0 DRAMSEL [2:0] Select the SDRAM size.
3-0 CCDLMT [3:0] To set the lines count which is synchronized for CCD timing(like NEC8884).
CLKSET2
4 RFHDIS
3 ENBDRAM
Command: Scanner command.
7 Reserved
3 SEND
6 SCSYNC
5 CLRERR
4 FULLSTP
R/W
X
X
X
X
GL846 High Speed USB2.0 2-in-1 Scanner Controller With Fast ADF
CLKSET1
SCSYNC
R/W
W
X
X
To reset steps type to full step.
00 2400bps.
01 4800bps.
10 9600bps.
11 19200bps.
000 24MHz.
001 30MHz.
010 40MHz.
011 48MHz.
100 60MHz.
101 Reserved.
110 Reserved.
111 Reserved.
0 Enable auto-refresh mode for SDRAM.
1 Enable self-refresh mode for SDRAM.
A rising edge from low to high: to start power on sequence of SDRAM.
000 Reserved.
001 16M bits.
010 64M bist.
011 128M bits.
100 256M bits.
101 512M bits.
110
111 Reserved.
-
-
To send the RS232 data.
To synchronize base-clock and pixel-count for two chips operation
Reserved
CLKSET0
CLRERR
1G
R/W
W
X
X
bits.
FULLSTP
RFHDIS
R/W
W
X
X
ENBDRAM DRAMSEL2 DRAMSEL1 DRAMSEL0
CCDLMT3
SEND
R/W
R/W
W
CCDLMT2 CCDLMT1 CCDLMT0
CLRMCNT
R/W
R/W
W
CLRDOCJM
R/W
R/W
W
CLRLNCNT
Page 30
R/W
R/W
W