Method and apparatus of interface conversion for handheld device
First Claim
1. In a handheld information handling apparatus having a connector interface for swappable connection to appendant devices of two kinds, said appendant device of the first kind when connected thereto communicating with said information handling apparatus using a first transmission standard, and said appendant device of the second kind when connected thereto communicating with said information handling apparatus using a second transmission standard, a method of signal transmission between said information handling apparatus and said appendant devices, comprising the steps of:
- representing a first set of signals generated according to said first transmission standard by a reduced set of signals, wherein said reduced set of signals is transmitted over said connector interface while said information handling apparatus is communicating with said appendant device of the first kind;
transmitting a second set of signals according to said second transmission standard over said connector interface while said information handling apparatus is communicating with said appendant device of the second kind.
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Abstract
The invention relates to an information handling system comprising a handheld device operable independently and having a first connector for external connection, wherein the handheld device functions in accordance with a first protocol and a second protocol; a first appendant device for the handheld device having a second connector for connecting to the first connector, wherein the first appendant device cooperates with the handheld device according to the first protocol inasmuch as the second connector is connected to the first connector; and a second appendant device for the handheld device having a third connector for connecting to the first connector, wherein the second appendant device cooperates with the handheld device according to the second protocol inasmuch as the third connector is connected to the first connector; wherein the first connector has connector pins whose number is less than the number specified in the first protocol for successful signal transmission between the handheld device and the first appendant device.
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Citations
20 Claims
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1. In a handheld information handling apparatus having a connector interface for swappable connection to appendant devices of two kinds, said appendant device of the first kind when connected thereto communicating with said information handling apparatus using a first transmission standard, and said appendant device of the second kind when connected thereto communicating with said information handling apparatus using a second transmission standard, a method of signal transmission between said information handling apparatus and said appendant devices, comprising the steps of:
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representing a first set of signals generated according to said first transmission standard by a reduced set of signals, wherein said reduced set of signals is transmitted over said connector interface while said information handling apparatus is communicating with said appendant device of the first kind;
transmitting a second set of signals according to said second transmission standard over said connector interface while said information handling apparatus is communicating with said appendant device of the second kind. - View Dependent Claims (2, 3, 4)
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5. A handheld information handling system for performing a plurality of functions, comprising:
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a display component for displaying information thereon;
a set of input components for operating the information handling system;
a circuitry for processing and transferring a first number of parallel signals generated in accordance with a first transmission standard while one of said functions is being performed, wherein said first number of parallel signals are generated at a first clock rate;
a first interface for external connection comprising a plurality of pins over which a second number of serial signals can be transmitted, wherein said second number is less than said first number;
a first parallel-serial converter coupling said circuitry and said first interface and thereby allowing said first number of parallel signals transferred by said circuitry and said second number of serial signals transmitted over said first interface to be mutually convertible. - View Dependent Claims (6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20)
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12. An information handling system comprising:
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a handheld device operable independently and having a first connector for external connection, wherein said handheld device functions in accordance with a first protocol and a second protocol;
a first appendant device for said handheld device having a second connector for connecting to said first connector, wherein said first appendant device cooperates with said handheld device according to said first protocol inasmuch as said second connector is connected to said first connector;
a second appendant device for said handheld device having a third connector for connecting to said first connector, wherein said second appendant device cooperates with said handheld device according to said second protocol inasmuch as said third connector is connected to said first connector;
wherein;
said first connector has connector pins whose number is less than the number specified in said first protocol for successful signal transmission between said handheld device and said first appendant device.
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Specification