USB4640 datasheet(36/64 Pages) SMSC

36 / 64 page

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

Datasheet

Revision 1.0 (06-09-09)

SMSC USB4640/USB4640i

DATASHEET

8.4.1.19

9Ch-9Fh: Attribute Byte Descriptions

BYTE

NAME

BIT

DESCRIPTION

ATT_LB

3:0

Always reads ‘0’.

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.

Always reads ‘0’.

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.

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.

ATT_HLB

3:0

Always reads ‘0’.

Activity LED True Polarity

‘1’ - Activity LED to Low True.

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

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.

Always reads ‘0’.

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.

USB4640 Datenblatt(PDF) 36 Page - SMSC Corporation

USB4640 Datenblatt(HTML) 36 Page - SMSC Corporation

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