Dual function busy pin
First Claim
1. A method for increasing the processing capability of a device, comprising:
- requesting access to a module in a display controller;
processing continuously until notification by the module in the display controller, wherein a multiplexer in the display controller sends a first signal to a pin when the module is available; and
accessing the module in the display controller after receiving the first signal via the pin.
2 Assignments
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Accused Products
Abstract
Provided is a method and apparatus for multiplexing a busy signal and another signal via a dual function pin. Specifically, a multiplexer in a display controller can select a wait signal or the busy signal and generate a signal to a processor. The signal to the processor can indicate the availability of a module in the display controller, such as JPEG module, for access by the processor. If the module is not available for access, then the processor continuously processes tasks without attempting to access the module in the display controller. The dual function pin, by interfacing with the busy signal, obviates an attempt by the processor to determine the availability of the module and permits backward compatibility with processors that can interface with another signal.
24 Citations
25 Claims
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1. A method for increasing the processing capability of a device, comprising:
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requesting access to a module in a display controller;
processing continuously until notification by the module in the display controller, wherein a multiplexer in the display controller sends a first signal to a pin when the module is available; and
accessing the module in the display controller after receiving the first signal via the pin. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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transmitting a first signal from a first processor to a second processor;
routing the first signal to a module in the second processor, wherein the first signal indicates to the module that the first processor requires one of read and write access to the module;
selecting a second signal from one of a wait signal and a busy signal in a multiplexer on the second processor; and
processing continuously in the first processor until the receipt of the busy signal via a pin. - View Dependent Claims (8, 9, 10)
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11. A device, comprising:
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a first processor coupled to a pin, the first processor being capable of continuously processing after transmitting a signal requesting access to a module in a second processor; and
a multiplexer in the second processor coupled to the pin, the pin being capable of notifying the first processor of the availability of the module in the second processor by the selection of one of a wait signal and a busy signal in the multiplexer. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A display controller configured to receive a first signal, comprising:
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a plurality of first modules internal to the controller, the plurality of first modules being capable of accessing a plurality of second modules external to the controller;
a multiplexer coupled to the plurality of first modules via a combinatorial multiplexer, the multiplexer being capable of transmitting a second signal to a pin by selecting one of a wait signal and a busy signal in the multiplexer in response to the first signal; and
a connector coupled to the multiplexer and the pin, the connector being capable of transmitting the second signal to a source of the first signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification