Mobile wireless communications device with reset functions and related methods

1. A mobile wireless communications device comprising:

a display;

a graphics processing unit (GPU) configured to be resettable and cause a change in said display when reset;

a wireless transceiver;

a processor cooperating with said GPU and said wireless transceiver and configured for wireless communications;

said processor configured to

be resettable along with said GPU, and

be partially resettable without resetting said GPU to avoid a change in said display and based upon a self-initiated command;

a power management circuit configured to shut down power to said GPU and said processor during resets thereof, but maintain power to said GPU and said processor during a partial reset of said processor, and having an output configured to generate a GPU reset hold signal;

said processor having an output configured to generate a GPU reset signal during the partial reset of said processor; and

a logic circuit configured to receive as inputs the GPU reset signal and the GPU reset hold signal and output a reset control signal to said GPU for resetting said GPU during the reset of said processor, and not resetting said GPO during the partial reset of said processor.

2. The mobile wireless communications device according to claim 1 wherein said logic circuit comprises an OR gate.

3. The mobile wireless communications device according to claim 1 further comprising a rechargeable power supply coupled to said display, said GPU, said wireless transceiver, and said processor.

4. The mobile wireless communications device according to claim 1 wherein said display comprises a liquid crystal display.

5. The mobile wireless communications device according to claim 1 wherein said wireless transceiver comprises a wireless cellular telephone transceiver.

6. A mobile wireless communications device comprising:

a display;

a graphics processing unit (CPU) configured to be resettable and cause a change in said display when reset;

a wireless transceiver;

a processor cooperating with said GPU and said wireless transceiver and configured for wireless communications;

a power management circuit configured to shut down power to said GPU and said processor during resets thereof, but maintain power to said GPU and said processor during a partial reset of said processor, and having an output configured to generate a GPU reset hold signal;

said processor having an output configured to generate a GPU reset signal during the partial reset of said processor;

a housing carrying said display, said GPU, said wireless transceiver, said processor, and said power management circuit;

said processor configured to

be resettable along with said GPU, and

be partially resettable without resetting said GPU to avoid a change in said display and based upon a self-initiated command; and

a logic circuit configured to receive as inputs the GPU reset signal and the GPU reset hold signal and output a reset control signal to said GPU for resetting said GPU during the reset of said processor, and not resetting said GPU during the partial reset of said processor.

7. The mobile wireless communications device according to claim 6 wherein said logic circuit comprises an OR gate.

8. The mobile wireless communications device according to claim 6 further comprising a rechargeable power supply coupled to said display, said GPU, said wireless transceiver, said processor, and said power management circuit.

9. The mobile wireless communications device according to claim 6 wherein said display comprises a liquid crystal display.

10. The mobile wireless communications device according to claim 6 wherein said wireless transceiver comprises a wireless cellular telephone transceiver.

11. A method for making a mobile wireless communications device comprising:

coupling a graphics processing unit (GPU) to a display, the GPU being resettable and causing a change in the display when reset;

coupling a processor to the GPU and a wireless transceiver for wireless communications, the processor being resettable along with the GPU, and being partially resettable without resetting the GPU to avoid a change in the display and based upon a self-initiated command, the processor having an output generating a GPU reset signal during the partial reset of the processor;

coupling a power management circuit to the GPU and the processor for shutting down power to the GPU and the processor during resets thereof, but maintaining power to the GPU and the processor during a partial reset of the processor, the power management circuit having an output generating a GPU reset hold signal; and

coupling a logic circuit to receive as inputs the GPU reset signal and the GPU reset hold signal and to output a reset control signal to the GPU for resetting the GPU during the reset of the processor, and not resetting the GPU during the partial reset of the processor.

12. The method according to claim 11 wherein the logic circuit comprises an OR gate.

13. The method according to claim 11 further comprising coupling a rechargeable power supply to the display, the GPU, the wireless transceiver, and the processor.

14. The method according to claim 11 further comprising providing a housing to carry the display, the GPU, the wireless transceiver, and the processor.

15. A method of operating a mobile wireless communications device including a display, a graphics processing unit (GPU) being resettable and causing a change in the display when reset, a wireless transceiver, and a processor cooperating with the GPU and the wireless transceiver for wireless communications and being resettable along with the GPU, the method comprising:

partially resetting the processor without resetting the GPU to avoid a change in the display, the partially resetting being based upon a self-initiated command;

using a power management circuit coupled to the GPU and the processor for shutting down power to the GPU and the processor during resets thereof, but maintaining power to the GPU and the processor during a partial reset of the processor;

using the processor to generate a GPU reset signal during the partial reset of the processor;

using the power management circuit to generate a GPU reset hold signal; and

using a logic circuit to receive as inputs the GPU reset signal and the GPU reset hold signal and to output a reset control signal to the GPU for resetting the GPU during the reset of the processor, and not resetting the GPU during the partial reset of the processor.