Patent
1992-02-28
1996-07-09
Kriess, Kevin A.
395550, G06F 116, G06F 108
Patent
active
055353983
ABSTRACT:
A method and apparatus for providing both power and control by way of an integrated circuit terminal (22). In one form, a clock source (12) supplies a periodic signal to a phase lock loop circuit (32) and to a multiplexer (34). The output of the phase lock loop circuit (32) is a second input to the multiplexer (34). The phase lock loop circuit (32) receives its power from a power and control pin (22). The multiplexer (34) receives its power from a power pin (24). The power and control pin (22) is used as a control input to multiplexer (34). Multiplexer (34) uses the power and control pin (22) to select which input to output as a system clock.
REFERENCES:
patent: 4893271 (1990-01-01), Davis et al.
patent: 4931748 (1990-06-01), McDermott
patent: 5133064 (1992-07-01), Hotta et al.
patent: 5134703 (1992-07-01), Bumbarger
patent: 5155841 (1992-10-01), Bumbarger
Terry Lawell, "Integrated Pass-Through Logic", Jan. 1982, Motorola Technical Developments vol. 2, p. 15.
Biggs Terry L.
Tietjen Donald L.
Wilson Jesse R.
Butler Dennis M.
Hill Susan C.
Kriess Kevin A.
Motorola Inc.
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