Apple Inc.

Ami Schwartzman

Lior Zimet

Achmed Rumi Zahir

Inder M Sodhi

Liran Fishel

Omri Flint

Doron Rajwan

Techniques are disclosed that pertain to synchronizing power states between integrated circuit dies. A system includes an integrated circuit that includes a plurality of integrated circuit dies coupled together. A particular integrated circuit die may include a primary power manager circuit and one or more remaining integrated circuit dies include respective secondary power manager circuits. The primary power manager circuit is configured to issue a transition request to the secondary power manager circuits to transition their integrated circuit dies from a first power state to a second power state. A given secondary power manager circuit is configured to receive the transition request, transition its integrated circuit die to the second power state, and issue an acknowledgement to the primary power manager circuit that its integrated circuit die has been transitioned to the second power state. Techniques are further disclosed relating to managing latency tolerance events within a multi-die integrated circuit.

Blocking latency events in multi-die architecture

A system includes multiple hardware circuits and protection circuitry. The multiple hardware circuits are coupled to respective power domains having respective sets of domain-specific power settings. The protection circuitry is configured to monitor requests in which one or more of the hardware circuits request transitions between the domain-specific power settings, to determine, from among multiple system-level combinations of the domain-specific power settings, a subset of system-level combinations that could potentially be traversed in performing the requested transitions, and to initiate a responsive action upon detecting that any of the system-level combinations in the subset is specified as invalid.

System-on-chip with DVFM protection circuit

Synchronizing power state changes between multiple dies

Multi-die power synchronization

Growing community of inventors

Kfar-Sava, Israel

Ami Schwartzman