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USB97CFDC2-01 Datasheet(PDF) 12 Page - SMSC Corporation |
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USB97CFDC2-01 Datasheet(HTML) 12 Page - SMSC Corporation |
12 / 24 page ![]() SMSC DS – USB97CFDC2-01 Page 12 Rev. 02-27-07 DATASHEET 6 CONFIGURATION OPTIONS If ROMEN is tied high, then the internal ROM code is used for operation. If low, then an external memory on the FD bus is used for operational code. If the internal ROM is used, OPT3 must be tied high and OPT[2:0] must be tied low through a resistor. In this mode, an external serial EEPROM is used to store the OEM’s USB assigned VID, their PID, their Product String, and the options for the particular drive connected to the USB97CFDC2-01. The data in the EEPROM is organized as follows: Note: If the data is not of the specified length, then fill the length with zeros, following the data. DEVICE DESCRIPTOR - 18 BYTES For a device with a VID/PID of 0424/0dc, the Device Descriptor looks like the one below. (Note that the data is separated by carriage returns in the “EEPROM.DAT” file. It is displayed here on a single line for clarity’s sake.) The VID/PID occupy byte position 9 through 12. 12 0110 01 00 00 00 40 24 04 dc 0f 22 01 01 02 00 01 The data in bold are the VID and PID information. Note that the lo and the hi bytes are swapped, as in VendorLo, VendorHi, ProductLo and ProductHi. LANGUAGE STRING - 4 BYTES String: 0409 (The language code for English) EEPROM.DAT: 04 03 09 04 (1 st byte is the length, then the string ID, followed by the language ID in little endian.) MANUFACTURER STRING – 60 BYTES (UNICODE FORMAT) Example String: SMSC EEPROM.DAT: 3c 03 53 00 4d 00 53 00 43 00 … 00 (1 st byte is the length, followed by the string ID and the Unicode string itself in little endian.) PRODUCT STRING – 60 BYTES (UNICODE FORMAT) Example String: USB FDC EEPROM.DAT: 3c 03 55 00 53 00 42 00 20 00 46 00 44 00 43 00 … 00 (Again the 1 st byte is the length, followed by the string ID and the Unicode string itself in little endian.) SERIAL NUMBER STRING – 60 BYTES (UNICODE FORMAT) String: None EEPROM.DAT: 3c 03 4e 00 6f 00 6e 00 65 00 … 00 (Again the 1 st byte is the length, followed by the string ID and the Unicode string itself in little endian.) INQUIRY DATA (IN RESPONSE TO A UFI_INQUIRY REQUEST) - 36 BYTES Bytes 0 – 7: The values for the 1 st 8 bytes of the inquiry data come from Table 10 of the USB Mass Storage Class UFI Command Specification. For the USB floppy device, those bytes should be 00 80 00 01 1f 00 00 00. These bytes do not change. Bytes 8 – 15: Vendor Information (Example: SMSC) EEPROM.DAT: 53 4d 53 43 20 Bytes 16 – 31: Product Identification (Example: USB FDD) EEPROM.DAT: 55 53 42 20 46 44 44 20 Bytes 32 – 35: Product Revision Level (Example: 2.00) EEPROM.DAT: 32 2e 30 30 |
Similar Part No. - USB97CFDC2-01 |
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Similar Description - USB97CFDC2-01 |
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