GPS with mask ROM, control IC of the GPS and method for implementing the same
First Claim
1. A global positioning system (GPS), comprising:
- a control unit comprising a microprocessor and a mask read-only memory (ROM) storing a map data;
a GPS radio-frequency (RF) processing circuit coupled to the control unit for receiving an RF signal, transforming the RF signal into a base-band or an intermediate frequency signal and transmitting the base-band or the intermediate frequency signal to the control unit; and
a first storage unit coupled to the control unit for temporally storing a program code;
wherein the microprocessor executes the program code and refers to the map data to achieve global positioning.
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Abstract
The present invention provides a global positioning system (GPS) and a method for implementing the system. The GPS includes a control unit, a GPS RF processing circuit and a storage unit. The control unit includes a microprocessor and a mask ROM storing reference information. The GPS RF processing circuit is coupled to the control unit for receiving an RF signal, transforming the RF signal into a base-band or an intermediate frequency signal and transmitting the base-band or the intermediate frequency signal to the control unit. The storage unit is coupled to the control unit to temporally store a program code. The microprocessor executes the program code and refers to the reference information to achieve global positioning.
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Citations
17 Claims
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1. A global positioning system (GPS), comprising:
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a control unit comprising a microprocessor and a mask read-only memory (ROM) storing a map data; a GPS radio-frequency (RF) processing circuit coupled to the control unit for receiving an RF signal, transforming the RF signal into a base-band or an intermediate frequency signal and transmitting the base-band or the intermediate frequency signal to the control unit; and a first storage unit coupled to the control unit for temporally storing a program code; wherein the microprocessor executes the program code and refers to the map data to achieve global positioning. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. A control integrated circuit (IC) of a global positioning system (GPS), the control IC comprising a microprocessor and a mask read-only memory (ROM) storing a map data, wherein the microprocessor operates and refers to the map data to achieve global positioning.
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15. A method for manufacturing a control integrated circuit (IC) of a global positioning system (GPS), the method comprising steps of:
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manufacturing a microprocessor and a mask read-only memory (ROM) of the control IC on a semiconductor substrate; and designing at least a data mask for defining the data content in the mask ROM according to a map data; wherein the microprocessor operates and accesses the data content in the mask ROM to achieve global positioning. - View Dependent Claims (16, 17)
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Specification