GPS with mask ROM, control IC of the GPS and method for implementing the same
AssigneeMStar Semiconductor, Inc.
InventorsSteve Wiyi Yang, Yu-Tai Chang
Life of this patent
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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.
Claims17
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.
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.
A method for manufacturing a control integrated circuit (IC) of a global positioning system (GPS), the method comprising steps of:
- 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.
Dependencies are inferred from the claim text.