Terminal apparatus
First Claim
1. A mobile communication terminal comprising:
- a microprocessor having registers and an internal memory;
an external memory coupled with the microprocessor;
an antenna receiving a reception data from outside of the mobile communication terminal and transmitting data to outside of the mobile communication terminal; and
an RF circuit converting a frequency of the reception data and the transmission data, wherein the microprocessor performs a CPU function and a DSP function, wherein the microprocessor transfers a data from the internal memory to the registers per one cycle when the microprocessor performs the CPU function, wherein the microprocessor can transfer two data from the memory to the registers per one cycle when the microprocessor performs the DSP function, wherein the internal memory has a first internal memory and a second internal memory, wherein the microprocessor can transfer two data from the first and second internal memories in parallel when the microprocessor performs the DSP function, and wherein the external memory is shared by the CPU function and DSP function.
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Accused Products
Abstract
A low cost, a low power consumption and a small size are three very important factors for a mobile communication terminal. A great problem is posed by the conventional technique using a DSP and a CPU independent of each other which requires two external memory systems. Also, two peripheral units are required for data input and output of the DSP and CPU. As a result, an extraneous communication overhead occurs between the DSP and the CPU. The invention realizes a mobile communication terminal system by a DSP/CPU integrated chip comprising a DSP/CPU core (500) integrated as a single bus master, an integrated external bus interface (606) and an integrated peripheral circuit interface. The memory systems and the peripheral circuits of the DSP and the CPU can thus be integrated to realize a mobile communication terminal system low in cost and power consumption and small in size.
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Citations
17 Claims
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1. A mobile communication terminal comprising:
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a microprocessor having registers and an internal memory;
an external memory coupled with the microprocessor;
an antenna receiving a reception data from outside of the mobile communication terminal and transmitting data to outside of the mobile communication terminal; and
an RF circuit converting a frequency of the reception data and the transmission data, wherein the microprocessor performs a CPU function and a DSP function, wherein the microprocessor transfers a data from the internal memory to the registers per one cycle when the microprocessor performs the CPU function, wherein the microprocessor can transfer two data from the memory to the registers per one cycle when the microprocessor performs the DSP function, wherein the internal memory has a first internal memory and a second internal memory, wherein the microprocessor can transfer two data from the first and second internal memories in parallel when the microprocessor performs the DSP function, and wherein the external memory is shared by the CPU function and DSP function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile communication terminal comprising:
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a microprocessor having registers and an internal memory;
an external memory coupled to the microprocessor;
an antenna receiving a reception data from outside of the mobile communication terminal and transmitting a transmission data to outside of the mobile communication terminal, and an RF circuit converting a frequency of the reception data and the transmission data, wherein the microprocessor performs a program by using a CPU function or a DSP function, wherein the internal memory has a first internal memory and a second internal memory, wherein the microprocessor can transfer two data from the first and second internal memories in parallel when the microprocessor performs the DSP function, and wherein the microprocessor performs the reception data by using the DSP function, the external memory stores a part or all of the data performed by using the DSP function. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification