SN11085

2002/12/01 ver 0.97

8

defines the relationship between the EEPROM value and the USB serial number

string. If no EEPROM is connected, ROMDO must be pulled high to set “no serial

number”.

Table 3 USB serial number data format

EEPROM nibble

USB Serial Number String

ASCII

0 through 9

0030H through 0039H

“0” through “9”

A through F

0041H through 0046H

“A” through “F”

Value of the lowest nibble (nibble 12) of the serial number is limited from 0 to 7. If

the MSB of the lowest nibble (nibble 12) is 1, the serial number feature will be

disabled and no serial number will be shown in the USB descriptor.

For a USB Mass Storage Class compliant device, the name of the manufacturer and

product can be shown in the device manager of the OS (use Windows as an example)

to distinguish products of the same type. The default vendor string of the SN11085 is

“USB NAND”. The default product string is “FLASH DISK”. Therefore, the

Windows will show “USB NAND FLASH DISK” when the default string is used. If

the system manufacturers need strings other than default ones, they can put the strings

they want in the EEPROM’s word 5 to 16, as shown in the table of first page.

5.3 software support

Sonix provides the following softwares to customers

1) Security driver for Win98/2000/Me/XP; boot up utility is included for Win98/Me

2) Mass production tool which provides the following function

i)

Flash memory format

ii)

File copy/compare for data validation

iii)

Copying files into the flash memory which are to be delivered with the

flash disk

iv)

ISP of 93C46

v)

Copying USB string into flash memory for customization

Security reset tool is only released to the manufacturers but not end users. The

Security reset tool will need a dedicated username and password to activate.