Qualcomm Incorporated

Deva Sudhir Kumar Pulivendula

Venkata Biswanath Devarasetty

Srinivas Turaga

Nikesh Gupta

Harshit Tiwari

Srikanth Gudipudi

Akshay Kumar Gupta

A method for reducing power in a system is provided according to aspects of the present disclosure. The system includes a chip, and a volatile memory. The method includes entering a sleep state, and exiting the sleep state. Entering the sleep state includes placing the volatile memory in a self-refresh mode, wherein the volatile memory stores one or more binary images and the volatile memory is powered in the sleep state, and collapsing multiple power supply rails on the chip. Exiting the sleep state includes restoring power to the multiple power supply rails on the chip, taking the volatile memory out of the self-refresh mode, and running the one or more binary images on one or more sub-systems on the chip.

Quick energy efficient reboot from ultra-low power mode for a system on a chip

A method and an apparatus for providing a power grid are provided. The apparatus includes a plurality of memory units comprising at least one SoC memory and at least one cache memory. The apparatus includes a first subsystem coupled to the at least one SoC memory associated with a first power domain. The apparatus further includes a second subsystem coupled to the at least one cache memory associated with a second power domain. The second subsystem may be a CPU subsystem. Because the first power domain sources power from a shared power source, the first power domain may operate at a voltage level that is higher than the operation of memory circuits requires. By moving the at least one cache memory from the first power domain to the second power domain, LDO efficiency loss for components in the first power domain may be reduced.

Power-aware CPU power grid design

Growing community of inventors

Hyderabad Telangana, India

Deva Sudhir Kumar Pulivendula