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GL640 Datasheet(PDF) 23 Page - List of Unclassifed Manufacturers

Part # GL640
Description  IEEE-1284 to USB Bridge
PDF  39 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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GL640 Datasheet(HTML) 23 Page - List of Unclassifed Manufacturers

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Revision 1.1
Jun. 7, 1999
-22-
GL640USB, GL640USB-A
7.4 USB Register Summary
Mnemonic
Offset
Description
Remarks
DEVCTL
10h
Device control register
EVTFLG
11h
USB function interrupt flag
DEVADR
12h
USB Device address
RXCTL0
13h
Endpoint 0 RX control
TXCTL0
14h
Endpoint 0 TX control
CTLDAT
15h
Endpoint 0/3 FIFO data port
MISC
16h
Miscellaneous register
GPIO
17h
GPIO value
GPIOCTL
18h
GPIO direction control
DEVCTL ( offset 10h )
R/W
R/W
R/W
R/W
R/W
DISGLUSB
EP0STL
WAKE
WAKEDIS
PWRDN
Default=8’h10
PWRDN
-
Power down mode
If USB suspend is detected, firmware can set PWRDN to put the controller into
power down mode. Power down mode stops oscillator and freezes all clocks at
known states, and no more command can be executed.
Hardware will automatically clear PWRDN upon hardware reset or interrupt
event.
WAKEDIS -
Disable remote wakeup capability
WAKE
-
Wake up host
Write ‘1’ to this bit will place USB bus to K state.
EP0STL
-
Endpoint 0 stall
Endpoint 0 will respond with a STALL to a valid transaction.
DISGLUSB -
Disable GL640USB, and bypass all EPP signals



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