High performance microprocessor having variable speed system clock
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United States of America Patent
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Sep 15, 1998
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Aug 3, 1989
priority date (Note) -
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Abstract
A high performance, low cost microprocessor system having a variable speed system clock is disclosed herein. The microprocessor system includes an integrated circuit having a central processing unit and a ring oscillator variable speed system clock for clocking the microprocessor. The central processing unit and ring oscillator variable speed system clock each include a plurality of electronic devices of like type, which allows the central processing unit to operate at a variable processing frequency dependent upon a variable speed of the ring oscillator variable speed system clock. The microprocessor system may also include an input/output interface connected to exchange coupling control signals, address and data with the central processing unit. The input/output interface is independently clocked by a second clock connected thereto.
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