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Table 13: S1X settings description.

DIP slide switch S1A

DIP slide switches S1A is ON by default, to allow the USB FX2 microcontroller to read the serial EEPROM and enumerate as a custom/specific USB device.

• When DIP slide switches S1A is ON, the USB FX2 microcontroller can (re)write the (old) serial EEPROM to, for example, store a (new) custom/specific firmware.
• When DIP slide switch is OFF, the USB FX2 microcontroller cannot read the serial EEPROM and enumerates as a

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• Cypress USB generic driver. It is used for boot recovery.

DIP slide switches S1B and S1C