S1 enables / disables the communication between the Cypress EZ-USB FX2 microcontroller and the I2C CMOS Serial EEPROM.
Turn S1 off when programming the USB EEPROM (storing the USB vendor ID and device ID). This will force the USB microcontroller to provide its default vendor ID and device ID.

S1

Label

position

ON *

EEPROM

EEPROM enabled

OFF 

OFF

EEPROM disabled

S1 (* default ON)

For further information, please read this configuration paragraph.

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