GL640USB datasheet(23/39 Pages) ETC

23 / 39 page

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

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

GL640USB 数据表(PDF) 23 Page - List of Unclassifed Manufacturers

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