Where to use One Hot encoding and Gray encoding ?

[spartanthewarrior]

Gray and 1-hot encoding

Hi Can,

any body tell me

Where to use One Hot Encoding and Gray encoding.

 

[santuvlsi]

Re: Gray and 1-hot encoding

Gray Coding: Each state in state machine is assigned using gray coding, so that only one bit changes at a time.
Advantage: 1) this coding overcomes problems in binary coding like transition to dead, unwanted.
2) This coding is used in 1) Glitch free circuits 2) Asyn FIFO design 3) high speed decoding circuit
Disadvantage: Control logic is quite Complex.2) number of flip flop = number of flip flops in binary state machine

c) One Hot-Encoding: It takes one F/F for each state.
Advantage: Fast and control logic is simple, used in FPGA
Disadvantage: More hardware

Santu