USB4640-HZH SMSC [SMSC Corporation], USB4640-HZH Datasheet - Page 36

• Manufacturer Part Number: USB4640-HZH
• Description: High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
• Manufacturer: SMSC [SMSC Corporation]

Revision 1.0 (06-09-09)
8.4.1.19
BYTE
0
1
ATT_HLB
ATT_LB
9Ch-9Fh: Attribute Byte Descriptions
NAME
BYTE
BIT
3:0
3:0
4
5
6
7
4
5
6
7
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.
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.
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
36
DESCRIPTION
SMSC USB4640/USB4640i
Datasheet