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- By default FX3gets to talk to flash.
- Altera Byteblaster can program the flash no matter where the switch is set to.
- FX3 boots up and loads applications from SPI flash memory. After FX3 done with the SPI flash, FX3 flips the switch for FPGA to take SPI bus. FX3 then toggles GPIO52 (NCONFIG of FPGA) from LOW to HIGH for FPGA to start getting binary from SPI flash. FPGA binary has to be stored from address 0x0 of the flash, and the binary will take about half of the size of the flash. So FX3 applications will need to stay at the bottom half of the flash, and FX3 has to be able to load codes from wherever the code is stored.
Clock, Power and Reset
The main power input to the Demo3 Baseboard is DC 5V. It comes from USB3 with the ability of 900mA supply current. None of the chips in this board require any kind of sequencing.
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