Method and apparatus for communicating between integrated circuits in a low power mode
First Claim
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1. A computer system, comprising:
- a processor comprising a cache, a first bus interface and a second bus interface; and
a controller to snoop the cache via the first bus interface during a first mode of operation and to snoop the cache via the second bus interface during a second mode of operation.
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Abstract
For one embodiment, a computer system includes both high power and low power buses coupling a processor to a controller. When the processor is in a high power mode, its cache is snooped by the controller via the high power bus. When the processor is in a low power mode, its cache is snooped by the controller via the low power bus.
32 Citations
30 Claims
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1. A computer system, comprising:
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a processor comprising a cache, a first bus interface and a second bus interface; and
a controller to snoop the cache via the first bus interface during a first mode of operation and to snoop the cache via the second bus interface during a second mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer system, comprising:
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a high power bus;
a low power bus that is narrower than the high power bus and includes a clock signal line for source-synchronous operation;
a processor comprising a cache, a high power bus interface coupled to the high power bus and a low power bus interface coupled to the low power bus; and
a controller to communicate with the processor via the high power bus during a high power mode of operation and to communicate with the processor via the low power bus during a low power mode of operation. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. An integrated circuit comprising:
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a high power bus interface through which a memory region may be snooped during a high power mode of operation; and
a low power bus interface through which the memory region may be snooped during a low power mode of operation. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method of accessing a cache comprising:
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snooping a cache via a high power bus during a high power mode of operation;
transitioning to a low power mode of operation; and
snooping the cache via a low power bus during a low power mode of operation. - View Dependent Claims (28, 29, 30)
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Specification