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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