Advanced Micro Devices, Inc.
LONG-IDLE STATE SYSTEM AND METHOD

Abstract:

Methods, devices and systems for power management in a computer processing device are disclosed. The methods may include selecting, by a data fabric, D23 as target state, selecting D3 state by a memory controller, blocking memory access, reducing data fabric and memory controller clocks, reduce SoC voltage, and turning PHY voltage off. The methods may include signaling to wake up the SoC, starting exit flow by ramping up SoC voltage and ramping data fabric and memory controller clocks, unblocking memory access, propagating activity associated with the wake up event to memory, exiting D3 by PHY, and exiting self-refresh by a memory.