Rev 1.00

March 22, 2010

11

HT45B0K

SPI to USB Bridge

AWR Register

The AWR register contains the USB device address and the Remote wake-up function control bit.

The initial value of the USB device address is 00H. The address value extracted from the USB

command is to be immediately loaded into this register or not depending upon the device address

update control bit ASET in the SIES register.

AWR Register

Bit

7

6

5

4

3

2

1

0

Name

UAD6

UAD5

UAD4

UAD3

UAD2

UAD1

UAD0

WKEN

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

POR

0

0

0

0

0

0

0

0

Bit 7~1 UAD6~UAD0: USB device address

Bit 0

WKEN: USB device Remote Wake-up function enable control

0: disable USB remote wake-up function

1: enable USB remote wake-up function

STALL Register

The STALL register shows whether the corresponding endpoint works properly or not. As soon

as the endpoint works improperly, the related bit in the STALL register has to be set to 1 by

application program. The contents of the STALL register will be cleared by USB reset signal.

STALL Register

Bit

7

6

5

4

3

2

1

0

Name

――

STL5

STL4

STL3

STL2

STL1

STL0

R/W

――

R/W

R/W

R/W

R/W

R/W

R/W

POR

――

1

111

1

1

Bit 7~6 Unimplemented, read as “0”.

Bit 5~0 STL5~STL0: USB endpoint stall indication

0: the corresponding USB endpoint is not stalled.

1: the corresponding USB endpoint is stalled.

The STL bit is set by users when the related USB endpoint is stalled. These

bits are cleared by USB reset signal. For endpoint 0 the stall bit STL0 can also

be cleared by Setup Token event.