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GL640 датащи(PDF) 22 Page - List of Unclassifed Manufacturers

номер детали GL640
подробное описание детали  IEEE-1284 to USB Bridge
PDF  39 Pages
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производитель  ETC [List of Unclassifed Manufacturers]
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GL640 датащи(HTML) 22 Page - List of Unclassifed Manufacturers

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Revision 1.1
Jun. 7, 1999
-21-
GL640USB, GL640USB-A
AnCHK
-
This bit is used to select the type of EPP read engine
1 – EPP engine will check An pin before starting an EPP cycle.
0 – EPP engine doesn’t check An pin , n=0~2
ACTIVE
-
Select the An pin polarity
1 – active high for data ready 0 – active low for data ready
WRCHK
-
Select EPP check status during write or read
1- Check during EPP write cycle
0 – check during EPP read cycle
GLTHFLT -
Filter glitches on WAIT_
1-
Enable filter, performance maybe slow down
0 – Disable filter
EPPAD ( offset 9Fh )
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
EPPAD7
EPPAD6
EPPAD5
EPPAD4
EPPAD3
EPPAD2
EPPAD1
EPPAD0
This register is used to set/read pins D7-0.
To set D7-0, except writing EPPAD, the ADOE bit of EPPCTL register is set to 1
Read this register can get the status of pins D7-0.



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