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Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo
Revision 2.0 (10-03-08) 30 SMSC USB2640/USB2641
DATASHEET
7.3.2.1 0h-19h: USB Serial Number Option
7.3.2.2 1Ah-1Bh: USB Vendor ID Option
7.3.2.3 1Ch-1Dh: USB Product ID Option
7.3.2.4 1Eh-21h: USB Language Identifier Option
Table 7.3 Other Internal Configurations
REG ADDR REGISTER NAME REGISTER DESCRIPTION DEFAULT VALUE
F4h MS_SD_CLK_LIM MS/SD Clock Limit for
Flash Media Controller
00h
F5h N/A Reserved 66h
F6h N/A Reserved 00h
F7-FBh N/A Reserved 00h
FCh-FFh NVSTORE_SIG Non-volatile storage signature
(“ATA2”)
“ATA2”
BYTE
NUMBER BYTE NAME DESCRIPTION
25:0 USB_SER_NUM Default Value is: UNICODE "0000002640001".
Maximum string length is 12 hex digits. Must be unique to each device.
BYTE
NUMBER BYTE NAME DESCRIPTION
1:0 USB_VID This ID is unique for every vendor. The vendor ID is assigned by the USB
Implementers Forum.
BYTE
NUMBER BYTE NAME DESCRIPTION
1:0 USB_PID This ID is unique for every product. The product ID is assigned by the vendor.
BYTE
NUMBER BYTE NAME DESCRIPTION
3:0 USB_LANG_ID USB LANGUAGE ID
English Language Code = ‘0409’. Please refer to the USB 2.0 specification
for Other Language Codes.