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so, some devices like FPGAs have SPI bus interface and some others have I2C interface. That is why micro controllers talk to one through I2C and to other through SPI. I am reading some sample codes , so..., basic stuff,...
FPGA stands for Field-Programmable Gate Array. You can program SPI/IIC/I2S/Parallel/USB/whatever protocol you want into the FPGA.FPGA is just a package/pinout style (Flipchip Pin Grid Array...like what a computer CPU is). Microcontrollers that come in standard PDIP packages can also have SPI and I2C ports on chip as well.
FPGA stands for Field-Programmable Gate Array. You can program SPI/IIC/I2S/Parallel/USB/whatever protocol you want into the FPGA.
SPI and I2C have different capabilities and were designed for different purposes. SPI generally allows for much faster bidirectional data transfer with no data framing requirements, and a hardware chip select line to each SPI device. I2C on the other hand is a slower, half-duplex protocol that has framing requirements and addressing as part of it, meant for a number of devices on a 2-wire bus.
FC-PGA vs. FPGAApparently there are two different uses for the same acronym. My bad.