CAMERA CONTROL INTERFACE SLEEP AND WAKE UP SIGNALING
First Claim
1. A device, comprising:
- a control data bus including at least a first line;
a master device coupled to the control data bus and configured to manage access to the control data bus; and
a plurality of slave devices coupled to the control data bus and sharing the first line, wherein the master device is configured to send a single global wake up signal on the control data bus that causes any sleeping slave devices to wake up.
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Accused Products
Abstract
A device is provided comprising a control data bus including at least a first line. A master device may be coupled to the control data bus and configured to control the control data bus. A plurality of slave devices may be coupled to the control data bus and share the first line. The master device may be configured to send a single global wake up signal on the control data bus that causes any sleeping slave devices to wake up. Alternatively, the master device may send a global wake up signal followed by a targeted sleep signal to non-targeted slave devices to implement a “targeted wake up” of specific slave devices. The master device may send the single global wake up signal by bringing the first line low for a predetermined period of time.
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Citations
30 Claims
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1. A device, comprising:
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a control data bus including at least a first line; a master device coupled to the control data bus and configured to manage access to the control data bus; and a plurality of slave devices coupled to the control data bus and sharing the first line, wherein the master device is configured to send a single global wake up signal on the control data bus that causes any sleeping slave devices to wake up. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14-1. A method operational on a master device, comprising:
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controlling a control data bus with the master device, the control data bus including at least a first line; and transmitting, via the control data bus from the master device to a plurality of slave devices, a single global wake up signal that causes any sleeping slave devices to wake up.
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26. A master device, comprising:
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a bus interface to couple to a control data bus shared with a plurality of slave devices; and a processing circuit coupled to the bus interface and configured to; manage access to the control data bus by the plurality of slave devices; and issue a global wake up command to the plurality of slave devices over the control data bus. - View Dependent Claims (27, 28, 29)
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30. A slave device, comprising:
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a bus interface to couple to a control data bus shared with a plurality of slave devices; and a receiver logic circuit coupled to the bus interface and, in a sleep mode of operation, configured to; obtain a free running clock signal; use the free running clock signal to measure a length of time a line of the control data bus is either pulled low or high; and wake up the slave device if the measured length of time is greater than a predetermined amount of time.
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Specification