Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo
Revision 2.0 (10-03-08)
32
SMSC USB2640/USB2641
DATASHEET
7.3.2.8
9Bh: USB MaxPower (1 byte)
7.3.2.9
9Ch-9Fh: Attribute Byte Descriptions
BYTE
NUMBER
BYTE NAME
DESCRIPTION
7:0
USB_MAX_PWR
USB Max Power Per USB specification. Do NOT set this value greater than
100 mA.
BYTE
BYTE
NAME
BIT
NUMBER
DESCRIPTION
1
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
Activity GPIO High when Suspended
1 - The activity LED GPIO is set to High when suspended.
0 (default) - The activity LED GPIO is set to Low when suspended.
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
Always reads ‘0’.
2
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.
7:6
Always reads ‘0’.
3
ATT_LHB
0
Attach on Card Insert / Detach on Card Removal
1 - Attach on Insert is enabled
0 (default) - Attach on Insert is disabled
1
Always reads ‘0’.
2
Use Lun Power Configuration.
1 - Custom LUN Power Configuration stored in the NVSTORE is used.
0 (default) - Default LUN Power Configuration is used.
7:3
Always reads ‘0’.
4
ATT_HB
6:0
Always reads ‘0’.
7
xD Player Mode
