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1. (WO2018138466) NO-OPERATION POWER STATE COMMAND

Pub. No.:    WO/2018/138466    International Application No.:    PCT/GB2017/053660
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Wed Dec 06 00:59:59 CET 2017
IPC: H04W 52/02
G06F 1/32
Applicants: ARM LIMITED
Inventors: FLYNN, David Walter
VENKATARAMAN, Vasan
Title: NO-OPERATION POWER STATE COMMAND
Abstract:
A system comprises a first domain (4) and second domain (6) which communicate via an interface (8). The first domain (4) transmits power state commands to the second domain (6) for controlling transitions of power states at the second domain (6). The power state commands include at least a power up command (50) for triggering a transition to a power up state and a power no-operation command (52) in response to which the second domain remains in the current one of the power states. The no-operation command (52) enables the second domain (6) to be left in either the power up state or a different power state even if the first domain (4) is powered down.