what is the use of using a vlsi chip using fpga (costwise)when i can implement it using a microcontroller?

Answer 1

it depends on what you are doing, and what experience you have. if you dont know programming, but do know VHDL or schematic capture, then fpga is the way to go.
also if the fpga is doing high speed bit manipulation, then maybe its better to use the fpga.
you can get cheap micro's, but it depends on what kind of performance you need. basically, if its low and slow the micro is cheaper < $1. if its high speed then the micro will be more expensive.

Answer 2

When the speed of moving data, or of computation exceeds the processing power of the microcontroller, then one must use hardware (i.e. FPGAs).

5 years ago I had a project where I had to move 64-bit data at 250 MHz, "bin" the data, convert it from gray-code to binary, repackage the data, and perform 64 1024-point FFTs in under 500 microseconds. Show me a microcontroller (or even a DSP 5 years ago) that could do that. There were none -- that's why I used FPGA's.

For lower speed applications, there are advantages of using microcontrollers, but even in the FPGA world, there are low-cost FPGAs that rival the cost of microcontrollers.

Answer 3

It may be a cheaper approach if you are making a lot of them. For onesy-twosy, I'd go with a microcontroller.

Answer 4

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