Communication interface for an electronic device
First Claim
Patent Images
1. A communication interface for permitting an electronic device to be in communication with another electronic device using first or second data transmission modes, wherein said first mode of data transmission comprises single-ended asynchronous data transmission and wherein said second mode of data transmission comprises USB differential transmission of data, the interface comprising:
- first communication means for communication using said first mode;
second communication means for communication using said second mode;
switching means for selectively connecting the first/second communication means to a common transmission path based on means for determining the mode of data transmission on said common transmission path;
first and second input/output data lines;
wherein the interface is arranged to use the first and second input/output data lines for data transmission in said second USB differential data transmission mode and in said first single-ended asynchronous data transmission mode.
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Abstract
A mobile telephone handset is provided with a connector (8) and circuitry (18, 19) which permits universal serial bus (USB) and single-ended (SE) modes of data transmission with another device such as a personal computer, another mobile telephone handset or keyboard.
30 Citations
18 Claims
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1. A communication interface for permitting an electronic device to be in communication with another electronic device using first or second data transmission modes, wherein said first mode of data transmission comprises single-ended asynchronous data transmission and wherein said second mode of data transmission comprises USB differential transmission of data, the interface comprising:
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first communication means for communication using said first mode;
second communication means for communication using said second mode;
switching means for selectively connecting the first/second communication means to a common transmission path based on means for determining the mode of data transmission on said common transmission path;
first and second input/output data lines;
wherein the interface is arranged to use the first and second input/output data lines for data transmission in said second USB differential data transmission mode and in said first single-ended asynchronous data transmission mode. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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6. An interface according to claim q, wherein said first and second input/output data lines are connectable to a data bus.
Specification