Token-based power-switch control circuits

摘要

A method for operating an electronic apparatus is provided. The method includes receiving a token, activating a power switch for powering up a core in response to the receiving the token, and outputting the token based on a state of powering up the core. The outputting of the received token is delayed until the state of powering up the core is reached. In one aspect, an electronic apparatus includes a power switch configured to power up to a core is provided. A power-switch control circuit is configured to receive a token, activate the power switch for powering up the core in response to receiving the token, output the received token based on a state of powering up the core. The outputting of the received token is delayed until the state of powering up the core is reached. A plurality of the power-switch control circuits is configured as a ring.

主权项

1. A electronic apparatus, comprising:
a power switch configured to selectively provide power to a core; a power-switch control circuit configured to:
receive a token,activate the power switch in response to receiving the token, andoutput the received token to a second power-switch control circuit based on a state of powering up the core, wherein the outputting of the received token is delayed until the state of powering up the core is reached; a second power switch configured to selectively provide power to a second core; the second power-switch control circuit configured to:
receive the token outputted by the power-switch control circuit, andactivate the second power switch in response to receiving the token outputted by the power-switch control circuit; and one or more additional power-switch control circuits, wherein the second power-switch control circuit is configured to provide the token to the power-switch control circuit via the one or more additional power-switch control circuits.