It is another object of this invention to provide an integrated circuit that includes a plurality of circuit blocks, each being independent of the other, and a gating mechanism that is responsive to externally excited mode select inputs to selectively couple one of {HEAD ~ the circuit blocks} to interface {TAIL ~ pins} of the integrated circuit 
to interface
It is another object of this invention to provide an integrated circuit that includes a plurality of circuit blocks , each being independent of the other , and a gating mechanism that is responsive to externally excited mode select inputs to selectively couple one of { HEAD ~ the circuit blocks } to interface { TAIL ~ pins } of the integrated circuit
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