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Non-resettable flops are used everywhere.....!!! it is highest usage flop in any design. The resettable flops have limited usage. The technical advantage of resettable flop is that you can reach "known" state in a finite machine using a single transition on the reset pin else you might have to go through multiple cycles on the clock to reach a known state. This is mainly needed when you power on the chip. There is trade off between "no of cycles needed" to the extra area that one has to pay for resettable flops.
Non-resettable flops are used everywhere.....!!! it is highest usage flop in any design. The resettable flops have limited usage.
The only way artmalik would think this way is if all they work on is pure datapath designs that have very little control logic. If all you are doing is something like a running average or filtering some signal then you don't need any resets anywhere except perhaps in some specific control signal or FSM. If they taped out a design with an FSM with a dead state and that FSM doesn't have a reset. Well I can see some very ugly problem reports coming back from the field...e.g. "You're POS device locked up on powerup and we had to cycle power a few time before it started working. If you don't fix this we are buying from company xyz instead of you guys."Hi artmalik. Could you give me examples of such non resetttable flops. Take a generic digital controller as an example.
Which isn't hard, as it's an X in simulation.There is also a trade off with verification. When you choose a Non-resettable flop then you must also verify that the design will work under any startup condition.
Which isn't hard, as it's an X in simulation.