US 2002/0056014 A1 · Terminal apparatus

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.

Claims14

Dependent claims

A terminal apparatus comprising a microprocessor having a DSP function (600) and a CPU function integrated with each other as a single bus master, and an internal memory space and an external memory space integrated as a single memory space, wherein

the DSP function includes a plurality of internal memories (602, 603) and a plurality of buses (604, 605) for connecting said internal memories for executing the non-recursive filter operation constituting a basic operation of the digital signal processing at the rate of one cycle per tap,
and said CPU function (600) is capable of executing a basic instruction for any of such operations as calculation, internal memory access and data transfer at the rate of an instruction per cycle, and thereby capable of compiling a program written in a high-level language into said basic instruction and executing said basic instruction efficiently.

Dependencies are inferred from the claim text.

Terminal apparatus

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Terminal apparatus

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Abstract

Claims14