PORTABLE DEVICE AND METHOD FOR PROVIDING NAVIGATION DATA
First Claim
1. A portable device capable for providing navigation data, comprising:
- a mask ROM for storing and providing an original navigation map data;
an input unit for receiving an updated navigation map data;
a RAM for storing the updated navigation map data;
a GPS unit for receiving a positioning coordinate from a GPS; and
a CPU electrically coupled to the mask ROM, the input unit, the RAM, and the GPS unit, wherein the CPU reads the original navigation map data, and when the updated navigation map data exists, the CPU uses the updated navigation map data to revise the original navigation map data in order to generate a revised navigation map data and to find a position represented by the positioning coordinate on the revised navigation map data.
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Accused Products
Abstract
A portable device capable for providing navigation data and the method thereof. The portable device includes a mask ROM (Read Only Memory), an input unit, a RAM (Random Access Memory), a GPS (Global Positioning System) unit, a CPU (Central Processing Unit), and an output unit. First, an updated navigation map data is provided into the input unit of the portable device and stored in the RAM. Then, the CPU compares the updated navigation map data with an original navigation map data stored in the mask ROM to generate a revised navigation map data. Afterwards, the CPU calculates the position of the user on the revised navigation map data according to a positioning coordinate from the GPS unit.
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Citations
10 Claims
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1. A portable device capable for providing navigation data, comprising:
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a mask ROM for storing and providing an original navigation map data;
an input unit for receiving an updated navigation map data;
a RAM for storing the updated navigation map data;
a GPS unit for receiving a positioning coordinate from a GPS; and
a CPU electrically coupled to the mask ROM, the input unit, the RAM, and the GPS unit, wherein the CPU reads the original navigation map data, and when the updated navigation map data exists, the CPU uses the updated navigation map data to revise the original navigation map data in order to generate a revised navigation map data and to find a position represented by the positioning coordinate on the revised navigation map data. - View Dependent Claims (2, 3, 4, 5)
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6. A method for providing navigation data suitable for a portable device, comprising:
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using a mask ROM to store an original navigation map data;
determining whether an updated navigation map data exists or not;
if the updated navigation map data exists, using the updated navigation map data and the original navigation map data to generate a revised navigation map data;
receiving a positioning coordinate; and
finding a position of the positioning coordinate on the revised navigation map data. - View Dependent Claims (7, 8, 9, 10)
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Specification