Peripheral buses for integrated circuit
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Jul 31, 1998
filing date -
Jul 31, 1998
priority date (Note) -
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Abstract
The present invention provides an integrated circuit comprising a system bus to which a processor is connectable, and first and second peripheral buses to which peripheral units used by said processor are connected, the first peripheral bus operating at a higher clock speed than the second peripheral bus. Further, the integrated circuit comprises bridge logic for providing an interface between the system bus and the peripheral buses to enable signals to be passed between the system bus and the peripheral buses, the bridge logic comprising clock resynchronisation logic for synchronising the system bus and the peripheral buses. Through the provision of first and second peripheral buses operating at different clock speeds, the integrated circuit of the present invention provides a great deal of flexibility for reducing the power consumption of the integrated circuit as compared with a similar integrated circuit having only one peripheral bus. Since the power consumption of each peripheral bus is proportional to the clock frequency and capacitance, significant power consumption savings can be realised by ensuring that each peripheral unit is connected to the slowest peripheral bus appropriate for that peripheral unit.
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- 15 United States
- 10 France
- 8 Japan
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- 5 Korea
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Patent Owner(s)
- ARM LIMITED
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Stevens, Ashley Miles | Cambridge, GB | 14 | 269 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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