9

03/06/00

GL651USB USB KEYBOARD HUB CONTROLLER

Version 1.0

EVTFLG

_2

( offset 02, default = 00h )

R/W1C

R/W1C

R/W1C

R/W1C

R/W1C

--

--

--

WAKEUP

SUSPD

USBRST

SOF

C_LCPWR

Interrupt event flag –

SUSPD

: the controller goes into suspend state

WAKEUP

: remote wakeup is detected when global suspended

USBRST

: End of USB reset

SOF

: SOF detected or generated by HUB timer.

C_LCPWR

: POWER source change.

RXCTL0_HB

( offset 03, default = 40h )

R/W

R/O

R/O

R/O

R/O

R/O

R/O

R/O

RXDIS

RXSETUP

RXOUT

RXSEQ

RXCNT3

RXCNT2

RXCNT1

RXCNT0

RXCTL0 of hub.

Status of endpoint 0 receiving –

RXCNT3~0

: EP0 received data byte count.

RXSEQ

: 1 - The received data PID is DATA1

0 - The received data PID is DATA0

RXOUT

: 1 - The received token PID is OUT.

RXSETUP

: 1 - The received token PID is SETUP.

RXDIS

: 0 - Endpoint 0 FIFO is empty and ready for data-packet receiving.

1 - Endpoint 0 FIFO is filled with data and will reject the new-coming data

packet.

If RXDIS = 1, the device will not accept an OUT transaction addressed to it, and will respond

with a NAK to an error-free transaction. Hardware will automatically set RXDIS after a

successful receiving. After processing, the micro-controller should clear RXDIS to enable next

data-packet receiving or free FF0 for filling of the data to transmit. Note that a SETUP

transaction addressed to the device is always accepted even though RXDIS = 1.

RXCTL0_KB

( offset 04, default = 40h )

R/W

R/O

R/O

R/O

R/O

R/O

R/O

R/O

RXDIS

RXSETUP

RXOUT

RXSEQ

RXCNT3

RXCNT2

RXCNT1

RXCNT0

RXCTL0 of keyboard. Definition of each bit is the same as RXCTL0_HB.

TXCTL0_HB

( offset 05, default = 00h )

R/W

R/W

R/W

R/W

R/W

R/W

R/W

--

EP0STL

EP0OE

EP0SEQ

EP0CNT3

EP0CNT2

EP0CNT1

EP0CNT0

TXCTL0 of hub.

Endpoint 0 transmit setting –

EP0CNT3~0

: number of data bytes to transmit

EP0OE

: enable data transmit

1 – ready to transmit data packet

0 – not ready to transmit data packet (default)

EP0SEQ

: data packet type

0 –DATA0

1 –DATA1

EP0STL

: set endpoint 0 stall

1 – EP0 will respond to USB host controller with STALL packet

EP0STL will be automatically cleared when a setup transaction is accepted.

After filling the data-to-transmit into FF0, the micro-controller should setup this register to

enable endpoint 0 data transmit. If EP0OE = 0, endpoint 0 will respond to a valid IN transaction