High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller

Datasheet

8.4.1.199Ch-9Fh: Attribute Byte Descriptions

 

BYTE

 

 

BYTE

NAME

BIT

DESCRIPTION

 

 

 

 

0

ATT_LB

3:0

Always reads ‘0’.

 

 

 

 

 

 

4

Inquire Manufacturer and Product ID Strings

 

 

 

‘1’ - Use the Inquiry Manufacturer and Product ID Strings.

 

 

 

‘0’ (default) - Use the USB Descriptor Manufacturer and Product ID Strings.

 

 

 

 

 

 

5

Always reads ‘0’.

 

 

 

 

 

 

6

Reverse SD Card Write Protect Sense

 

 

 

‘1’ (default) - SD cards will be write protected when SW_nWP is high, and

 

 

 

writable when SW_nWP is low.

 

 

 

‘0’ - SD cards will be write protected when SW_nWP is low, and writable

 

 

 

when SW_nWP is high.

 

 

 

 

 

 

7

Extended Configuration Enable

 

 

 

'1' - This bit must be set to '1' to enable editing, updating, and reading from

 

 

 

registers 100h-17Fh.

 

 

 

'0' - The internal configuration is loaded. When this bit is not set (and it

 

 

 

equals '0'). It will not read from registers 100h-17Fh.

 

 

 

 

1

ATT_HLB

3:0

Always reads ‘0’.

 

 

 

 

 

 

4

Activity LED True Polarity

 

 

 

‘1’ - Activity LED to Low True.

 

 

 

‘0’ (default) - Activity LED polarity to High True.

 

 

 

 

 

 

5

Common Media Insert / Media Activity LED

 

 

 

‘1’ - The activity LED will function as a common media inserted/media

 

 

 

access LED.

 

 

 

‘0’ (default) - The activity LED will remain in its idle state until media is

 

 

 

accessed.

 

 

 

 

 

 

6

Always reads ‘0’.

 

 

 

 

 

 

7

Reverse SD2 Card Write Protect Sense

 

 

 

‘1’ (default) - SD cards in LUN 1 will be write protected when SW_nWP is

 

 

 

high, and writable when SW_nWP is low.

 

 

 

‘0’ - SD cards in LUN 1 will be write protected when SW_nWP is low, and

 

 

 

writable when SW_nWP is high.

 

 

 

 

Revision 1.0 (06-01-09)

36

SMSC USB4640/USB4640i

DATASHEET