TE0320 is provided with 4 system DIP slide switches as shown in the figure below: S1A, S1B, S1C, S1D.
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Please note the 4 switch labels are on one side and the <ON> label is on the opposite side.
DIP slide switches S1[A:D] condition the value of some system signals as described in the table below.
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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.
Mode pins M2 (S1B), M1 (S1C), M0 tell the FPGA how the bitstream will be loaded. See this section for more information.
DIP slide switch S1D is OFF by default, to allow the USB FX2 microcontroller and the FPGA to operate regularly.
During the transition from reset state (S1D ON for example) to regular state (S1F OFF), the USB FX2 microcontroller reload the serial EEPROM in RAM and the FPGA reload the bitstream from SPI Flash.