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GL640USB Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers |
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GL640USB Datasheet(HTML) 22 Page - List of Unclassifed Manufacturers |
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22 / 39 page  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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