Arrangement and method for controlling communication of data between processors
First Claim
1. A method for controlling communication of data between a first processor and a second processor which is coupled to the first processor, the method comprising:
- the first processor providing a ready-to-receive signal having an activated signal level or a deactivated signal level, which signal is used to indicate to the second processor that the first processor is or is not ready to receive data;
the second processor being able to change from an awake state to a sleep state and to change back from the sleep state to the awake state; and
the second processor detecting when the first processor changes the ready-to-receive signal from the deactivated signal level to the activated signal level while the second processor is in the sleep state and, in this case, determining that the changing of the ready-to-receive signal is a request for the second processor to change to the awake state.
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Abstract
The communication of data between two coupled processors is controlled using a ready-to-receive signal which is provided by the first processor such that it has an activated signal level or a deactivated signal level and which is used to indicate to the second processor that the first processor is or is not ready to receive data. The second processor is able to change from the awake state to a sleep state and to change back from the sleep state to the awake state. The second processor detects when the first processor changes the ready-to-receive signal from the deactivated signal level to the activated signal level while the second processor is in the sleep state and, in this case, determines that the changing of the ready-to-receive signal is a request to change to the awake state.
15 Citations
14 Claims
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1. A method for controlling communication of data between a first processor and a second processor which is coupled to the first processor, the method comprising:
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the first processor providing a ready-to-receive signal having an activated signal level or a deactivated signal level, which signal is used to indicate to the second processor that the first processor is or is not ready to receive data; the second processor being able to change from an awake state to a sleep state and to change back from the sleep state to the awake state; and the second processor detecting when the first processor changes the ready-to-receive signal from the deactivated signal level to the activated signal level while the second processor is in the sleep state and, in this case, determining that the changing of the ready-to-receive signal is a request for the second processor to change to the awake state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A dual-processor arrangement comprising:
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a first processor and a second processor; a data output of the first processor being coupled to a data input of the second processor and a data output of the second processor being coupled to a data input of the first processor; and a control signal output of the first processor being coupled to a control signal input of the second processor, wherein the first processor is set up to provide a ready-to-receive signal having an activated signal level or a deactivated signal level, which signal is used to indicate to the second processor that the first processor is or is not ready to receive data, wherein the second processor has a state control unit which is set up to change the second processor from an awake state to a sleep state and to change it back from the sleep state to the awake state, and wherein the second processor has a monitoring unit which is set up to detect when the first processor changes the ready-to-receive signal from the deactivated signal level to the activated signal level while the second processor is in the sleep state and, in this case, the state control unit is set up to determine that the changing of the ready-to-receive signal is a request to change the second processor to the awake state. - View Dependent Claims (9, 10, 11, 12, 14)
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Specification