| US 7,613,941 B2 | ||
| Mechanism for self refresh during advanced configuration and power interface (ACPI) standard C0 power state | ||
| Eric C. Samson, Folsom, Calif. (US); and Robert Riesenman, El Dorado Hills, Calif. (US) | ||
| Assigned to Intel Corporation, Santa Clara, Calif. (US) | ||
| Filed on Dec. 29, 2005, as Appl. No. 11/323,344. | ||
| Prior Publication US 2007/0157046 A1, Jul. 05, 2007 | ||
| Int. Cl. G06F 1/00 (2006.01); G06F 1/26 (2006.01); G06F 12/00 (2006.01) | ||
| U.S. Cl. 713—323 [713/300; 713/320; 711/106] | 18 Claims |
| 1. A method for memory to enter self refresh comprising:
calculating an amount of memory access idle time;
determining if memory access idle time exceeds one of an AC threshold and a DC threshold to change to a self refresh state,
wherein the AC threshold corresponds to operation when AC power is provided and the DC threshold corresponds to operation
when DC power is provided; and
changing to a self refresh state based on memory access idle time without explicit notification from a processor regarding
the processor power state.
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