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title	S1X settings description.

switch	S1 label	signal name	<OFF>	<ON>
S1A	1	EEPROM serial data	the USB FX2 microcontroller CANNOT read / write the serial EEPROM	the USB FX2 microcontroller can read / write the serial EEPROM
S1B	2	M2	mode pin M2 = 1	M2 = 0
S1C	3	M1	mode pin M1 = 1	M1 = 0
S1D	4	/MR (master reset)	module reset	module running

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

Mode pins M2 (S1B), M1 (S1C), M0 tell the FPGA how the bitstream will be loaded. See this section for more information.

DIP slide switches S1D is OFF by default, to allow the USB FX2 microcontroller and the FPGA to run

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