Method and apparatus for mission critical standby of a portable communication drive
First Claim
1. A portable communication device, comprising:
- a primary processor for a first operating platform;
a secondary processor for a second operating platform, the secondary processor communicatively coupled to the primary processor; and
a power state manager, the power state manager configured to;
determine whether the primary processor is in a powered off state;
determine a power state of the secondary processor by monitoring a core power supply voltage of the secondary processor; and
sequence supply of power to the secondary processor sequenced between;
a first state for cleanup operation of the secondary processor;
a second state for standby of the secondary processor, wherein state information of the secondary processor is maintained;
a third state for shutdown of the secondary processor;
wherein;
the power state manager includes;
a first mode, the first mode to allow the primary processor to monitor a power state of the secondary processor based on a determination that the primary processor is not in the powered off state; and
a second mode, the second mode to enable the power state manager to monitor the power state of the secondary processor based on a determination that the primary processor is in the powered off state.
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Abstract
A method and apparatus for mission critical standby of a portable communication device are disclosed. A portable communication device may include a primary processor for a first operating platform, a secondary processor for a second operating platform and communicatively coupled to the primary processor, and a power state manager that may have a first mode and a second mode. The power state manager may be configured to determine whether the primary processor is in a powered off state and sequence supply of power to the secondary processor. The first mode may allow the primary processor to monitor a power state of the secondary processor based on a determination that the primary processor is not in the powered off state and the second mode may enable the power state manager to monitor the power state based on a determination that the primary processor is in the powered off state.
24 Citations
12 Claims
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1. A portable communication device, comprising:
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a primary processor for a first operating platform; a secondary processor for a second operating platform, the secondary processor communicatively coupled to the primary processor; and a power state manager, the power state manager configured to; determine whether the primary processor is in a powered off state; determine a power state of the secondary processor by monitoring a core power supply voltage of the secondary processor; and sequence supply of power to the secondary processor sequenced between; a first state for cleanup operation of the secondary processor; a second state for standby of the secondary processor, wherein state information of the secondary processor is maintained; a third state for shutdown of the secondary processor; wherein; the power state manager includes; a first mode, the first mode to allow the primary processor to monitor a power state of the secondary processor based on a determination that the primary processor is not in the powered off state; and a second mode, the second mode to enable the power state manager to monitor the power state of the secondary processor based on a determination that the primary processor is in the powered off state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A portable communication device, comprising
a primary processor for a first operating platform; -
a secondary processor for a second operating platform, the secondary processor;
communicatively coupled to the primary processor; anda power state manager, the power state manager configured to; determine whether the primary processor is in a powered off state; determine a power state of the secondary processor by monitoring a state of a clock generator of the secondary processor; and sequence supply of power to the secondary processor sequenced between; a first state for cleanup operation of the secondary processor; a second state for standby of the secondary processor, wherein state information of the secondary processor is maintained; a third state for shutdown of the secondary processor; wherein; the power state manager includes; a first mode, the first mode to allow the primary processor to monitor the power state of the secondary processor based on a determination that the primary processor is not in the powered off state; and a second mode, the second mode to enable the power state manager to monitor the power state of the secondary processor based on a determination that the primary processor is in the powered off state.
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12. A portable communication device, comprising
a primary processor for a first operating platform; -
a secondary processor for a second operating platform, the secondary processor;
communicatively coupled to the primary processor; anda power state manager, the power state manager configured to; determine whether the primary processor is in a powered off state; determine a power state of the secondary processor; and sequence supply of power to the secondary processor sequenced between; a first state for cleanup operation of the secondary processor; a second state for standby of the secondary processor, wherein state information of the secondary processor is maintained; a third state for shutdown of the secondary processor; wherein; the power state manager includes; a first mode, the first mode to allow the primary processor to monitor the power state of the secondary processor based on a determination that the primary processor is not in the powered off state; a second mode, the second mode to enable the power state manager to monitor the power state of the secondary processor based on a determination that the primary processor is in the powered off state; the power state manager is configured to determine the power state of the secondary processor is in the first state based on the voltage of the secondary professor being above a threshold; and the power state manager is configured to sequence the secondary processor from the first state to the third state in response to expiration of a watchdog timer, the watchdog timer being reset during the cleanup operation of the secondary processor.
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Specification