Apparatus and method for determining a disconnection of a device from a bus
AssigneeNXP USA, Inc.
InventorKenneth Jaramillo
Life of this patent
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Abstract
An apparatus for determining a disconnection of a device from a bus, the apparatus comprising: a detection unit configured to periodically poll the bus, to detect an occurrence of an indicator of disconnection; and a handling unit configured to, in response to detecting the occurrence of an indicator of disconnection a predetermined number of times within a predetermined interval, make a determination that the device is disconnected from the bus. A method for determining a disconnection of a device from a bus is also presented.
Claims22
An apparatus for determining a physical disconnection of a device from a physical bus, the apparatus comprising:
- a detection unit configured to periodically poll the physical bus, to detect an occurrence of an indicator of the physical disconnection;
- a handling unit configured to, in response to detecting the occurrence a predetermined number of times within a predetermined interval, make a determination that the device is physically disconnected from the physical bus;
- wherein the predetermined number of times of the occurrence is at least two;
- and
- a counter unit configured to increment, in response to each occurrence of the indicator of disconnection, to count the number of occurrences of the indicator of disconnection;
- and
- reset in response to the counted number of occurrences of the indicator of disconnection not reaching the predetermined number within the predetermined interval.
A method for determining a physical disconnection of a device from a physical bus, the method comprising:
- periodically polling the physical bus, to detect an occurrence of an indicator of the physical disconnection;
- in response to detecting the occurrence a predetermined number of times within a predetermined interval, making a determination that the device is physically disconnected from the physical bus;
- wherein the predetermined number of times of the occurrence is at least two;
- detecting the occurrence of an indicator of disconnection a predetermined number of times within a predetermined interval comprises:
- incrementing a counter in response to each occurrence of the indicator of disconnection, to count the number of occurrences of the indicator of disconnection, and
- in response to the counter not reaching the predetermined number within the predetermined interval, resetting the counter.
A method for determining a physical disconnection of a device from a physical bus, the method comprising:
- periodically polling the physical bus, to detect an occurrence of an indicator of the physical disconnection;
- and
- in response to detecting the occurrence a predetermined number of times within a predetermined interval, making a determination that the device is physically disconnected from the physical bus;
- wherein the predetermined number of times of the occurrence is at least two;
- wherein the predetermined interval is a predetermined number of frames, greater than one;
- and
- wherein detecting the occurrence of an indicator of disconnection a predetermined number of times within a predetermined interval comprises:
- for each frame, determining whether an indicator of disconnection has occurred the predetermined number of times within a most recent predetermined number of frames.
Dependencies are inferred from the claim text.