POWER MANAGEMENT FOR MEMORY ACCESSES IN A SYSTEM-ON-CHIP

摘要

Techniques and mechanisms to manage power states for a system-on-chip (SOC). Multiple modules of the SOC include a first module to perform a task including one or more accesses to a memory. In an embodiment, the SOC is transitioned to one of a path-to-memory-available (PMA) power state and a path-to-memory-not-available (PMNA) power state, where the transition is in response to an indication that, of the multiple modules, only the first module is to access the memory during the task. The PMA power state enables data communication between the memory and the first module and prevents data communication between the memory and any other module of the multiple modules. In another embodiment, the PMNA power state prevents data communication between the memory and any of the multiple modules, but allows a low latency transition from the PMNA power state to the PMA power state.