JP2002116913A - Data processor and communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data processor and communication terminal equipment capable of realizing more functions by using one DSP. SOLUTION: This data processor is provided with a CPU 1 for controlling a data processor main body, the DSP 11 with a built-in RAM for storing execution program data for realizing device functions and a ROM 2 for storing at least processing program data for the DSP 11 to be executed by the DSP 11. Prior to the processing start of the DSP 11, the CPU 1 reads the processing program data for the DSP 11 from the ROM 2 and transfers them to the DSP 11. The DSP 11 preserves the processing program data in the RAM and starts the execution of the processing program for the DSP 11 preserved in the RAM. Thus, the number of an exterior ROM required for the processor is limited to one, the processor is miniaturized and processor costs are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device provided with a DSP for realizing device functions and a communication terminal device provided with a DSP for realizing modem functions.

[0002]

2. Description of the Related Art Conventionally, in a data processing device, a communication terminal device, or the like, a DSP (Digital) is used as a means for realizing a specific device function (for example, a modem function).
Signal Processor (Digital Signal Processor) is used.

The DSP stores various data such as processing program data to be executed by itself, and a RAM (Random Access) constituting a work area.
Memory; a random access memory), and a plurality of functions can be realized by rewriting the processing program data stored in the RAM.

[0004]

[Problems to be solved by the invention]

In a data processing device and a communication terminal device equipped with a DSP, for example, Japanese Patent Laid-Open No.
No. 655, a ROM (R) storing processing program data to be executed by a DSP.
A read only memory (read only memory) is connected to the DSP bus, and processing program data for the DSP is read from the ROM and transferred to the DSP.

However, in such a conventional device,
It is necessary to provide the DSP with a function of transferring processing program data from the ROM, and there is a problem that the DSP cannot be applied to a general-purpose DSP. Further, since the processing program data for the DSP is stored in the ROM connected to the DSP bus, the capacity of the usable ROM is limited to the bus width of the DSP, and therefore, for example, when a plurality of modem functions are realized. However, there has been a problem that it is difficult to secure a capacity necessary for the above.

The present invention has been made in view of the above circumstances, and provides a data processing device and a communication terminal device capable of realizing more functions using one DSP. The purpose is.

[0008]

According to the present invention, there is provided a CPU for controlling a data processing apparatus main body, a DSP for incorporating a RAM for storing execution program data, and for realizing the function of the apparatus, and the CPU. ROM, which stores at least a CPU processing program data executed by the CPU and a DSP processing program data executed by the DSP, and a DSP interface means for connecting the CPU and the DSP. Prior to the start of the DSP processing, the CPU
The DSP processing program data is read from the OM, and the DS processing program data is read through the DSP interface means.
P, the DSP stores the DSP processing program data input from the CPU via the DSP interface means in the RAM, and when the storage is completed, the DSP processing program stored in the RAM. Is started. The ROM stores a plurality of the DSP processing program data, and the CPU reads the DSP processing program data corresponding to the device function to be executed by the DSP, and reads the DSP processing program data through the DSP interface means. This is to be transferred to a DSP. Further, the CPU, the DSP, and the DSP interface means are incorporated in the same semiconductor device.

A CPU for controlling the main body of the data processing apparatus, and a RAM connected to a bus of the CPU and for storing execution program data;
A DSP for realizing device functions, a ROM connected to a bus of the CPU and storing at least CPU processing program data to be executed by the CPU and DSP processing program data to be executed by the DSP;
Prior to the start of the DSP processing, the PU reads the ROM
From the DSP processing program data,
The DSP transfers the DSP processing program data input from the CPU to the RAM.
When the storage is completed, execution of the DSP processing program stored in the RAM is started. The ROM stores a plurality of the DSP processing program data, and the CPU
The DSP corresponding to the device function to be executed by the DSP
The processing program data is read out and transferred to the DSP. The CPU and the DSP are incorporated in the same semiconductor device.

Also, a CPU for controlling the communication terminal device main body and an RA for storing execution program data are provided.
M, a DSP for realizing a modem function, and a CP connected to the CPU bus and executed by the CPU.
ROM storing at least U processing program data and modem processing program data to be executed by the DSP
And a DSP for connecting the CPU and the DSP
Interface means, wherein the CPU comprises the DS
Prior to the start of the processing of P, the modem processing program data is read from the ROM and transferred to the DSP via the DSP interface means.
Communicates with the CP via the DSP interface means.
The modem processing program data input from U is stored in the RAM, and when the storage is completed, the modem processing program stored in the RAM is executed. The ROM stores a plurality of the modem processing program data. The CPU reads out the modem processing program data corresponding to the modem function to be executed by the DSP and sends the read data to the DSP via the DSP interface means. It is intended to be transferred. Further, the CPU, the DSP, and the DSP interface means are incorporated in the same semiconductor device.

A DSP for controlling a communication terminal device main body, a DSP connected to a bus of the CPU, and having a built-in RAM for storing execution program data and realizing a modem function. A ROM connected to a bus of the CPU and storing at least CPU processing program data executed by the CPU and modem processing program data executed by the DSP;
U reads the modem processing program data from the ROM and transfers it to the DSP prior to the start of the DSP processing, and the DSP stores the modem processing program data input from the CPU in the RAM. Upon completion of the storage, the execution of the modem processing program stored in the RAM is started. Further, the ROM stores a plurality of the modem processing program data, and the CPU
The modem processing program data corresponding to the modem function to be executed is read out and transferred to the DSP. The CPU and the DSP
Are incorporated in the same semiconductor device.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in detail.

FIG. 1 shows a configuration example of a group 3 facsimile apparatus according to an embodiment of the present invention.

In FIG. 1, a CPU (central processing unit) 1
Performs a control process of each unit of the group 3 facsimile apparatus and a predetermined group 3 facsimile transmission control procedure process. The ROM 2 executes a control process program executed by the CPU 1 and a control process program executed by the CPU 1. The RAM 3 stores necessary various data and the like. The RAM 3 constitutes a work area of the CPU 1 and stores various information unique to the group 3 facsimile apparatus. This is for outputting time information.

The scanner 5 is for reading an original image at a predetermined resolution, the plotter 6 is for recording and outputting an image at a predetermined resolution, and the operation display unit 7 is a facsimile apparatus. To operate,
It consists of various operation keys and various indicators.

The encoding / decoding unit 8 encodes and compresses the image signal and decodes the encoded and compressed image information into the original image signal.
This is for storing a large number of image information in a coded and compressed state.

The network control device 10 is for connecting this group 3 facsimile apparatus to the analog public network PSTN, and has an automatic transmission / reception function.

The DSP 11 is for realizing a group 3 facsimile modem function (hereinafter referred to as "group 3 facsimile modem function") and a data modem function, and has a RAM for storing program data to be executed. It has a built-in ROM and a ROM for storing a control program for performing various management controls of itself. The DSP 11 exchanges data with the CPU 1 via the DSP interface circuit 12, and exchanges transmission / reception signals on the line side with the network controller 10. Here, the group 3 facsimile modem function includes a low-speed modem function (V.21 modem) for exchanging transmission procedure signals and a high-speed modem function (V.17 modem, V.21 modem) mainly for exchanging image information. 34 modem, V.34.
29 modem, V.29. 27ter modem, etc.). The processing program executed by the DSP 11 is stored in the ROM 2
(Described later).

These CPU1, ROM2, RAM
3, a clock circuit 4, a scanner 5, a plotter 6, an operation display unit 7, an encoding / decoding unit 8, an image storage device 9, and a network control device 10 are connected to an internal bus 13 and each of these components The exchange of data between them is mainly performed via the internal bus 13.

The CPU 1, the DSP 11, and the D
The SP interface circuit 12 is connected to the same semiconductor device A
By incorporating it into SICa, this group 3
The number of components constituting the facsimile apparatus can be reduced.

The storage area of the program data stored in the ROM 2 is, as shown in FIG.
CPU that stores control processing programs to be executed
And a DSP program area in which a processing program executed by the DSP 11 is stored.

In the DSP program area, as shown in FIG. V.34 modem function and V.34 modem function as low-speed modem function.
21 DSP program data # for realizing modem function
V.1 as high-speed modem function V.17 modem function and a low-speed modem function. DSP program data # 2 for realizing the modem function; 29 modem function as well as V.29 modem function as a low-speed modem function. DSP program data # 3 for realizing a modem function; 27te
r modem function as well as V.R. DSP program data # 4 for realizing the modem function 21 and DS for realizing the data modem function
P program data # 5 is stored.

In the above-described configuration, for example, when performing image information communication with a facsimile apparatus, the DSP 11 defaults to the highest speed V.11 as a high-speed modem function. V.34 modem function and V.34 modem function as low-speed modem function.
21 mode is set to realize the modem function.

That is, in this default state, R
The DSP program data # 1 is transferred from the CPU 1 to the DSP 11 from the OM 2 and stored in the built-in RAM (not shown) of the DSP 11 by the control program of the DSP 11,
The SP 11 is set to execute the program data stored in the built-in RAM. V.34 modem function and V.34 modem function as low-speed modem function. 21 modem function is realized.

At the time of performing image information communication, the CPU 1 first executes V.30 to negotiate a function with a partner terminal.
V.34 modem function. 8 Attempt to negotiate a terminal function or the like using the modem function. At this time, the other party's terminal In the case where the terminal has the modem function, the other party's terminal receives V.34 as an incoming call response. 8 The signal ANSam of the modem function is transmitted.

Therefore, upon receiving this signal ANSam, the DSP 11 thereafter sets the V.A. After the negotiation process of the terminal function of the 8 modem function, the CPU 1
V11 as a function of P11. 34 modem function.
An image information communication operation using a modem function is performed.

On the other hand, if the partner terminal is V. If the DSP 11 does not have the modem function, the signal ANSam cannot be detected as a response to the incoming call, so the DSP 11 notifies the CPU 1 to that effect. 17 Select the modem function
To that effect.

When notified of the modem function to be used by the CPU 1, the DSP 11 notifies the CPU 1 of the number of the DSP program data to be transferred to realize the notified modem function. In this case, the notified modem function is V. Since this is a 17-modem function, "2" is notified to the CPU 1 as the number of the corresponding DSP program data.

As a result, the CPU 1 reads the DS of the ROM 2
The DSP program data of the designated number is read from the P program area and transferred to the DSP 11. In this case, since the number “2” has been designated, the DSP program data # 2 is read and transferred to the DSP 11.
When the data transfer is completed, the CPU 1 notifies the DSP
11 is notified.

The DSP 11 stores the DSP program data transferred from the CPU 1 in the built-in RAM,
When the data transfer end is notified from the PU1, the data storing operation is ended and the DSP program data stored in the built-in RAM is started.

Accordingly, thereafter, the DSP 11
V. V.17 modem function and V.17. 21 functions as a group 3 facsimile modem having a modem function.

In this manner, the V.V. The pre-group 3 facsimile transmission procedure after setting the 17 modem function is:
V. The modem function is applied, a predetermined transmission procedure signal is exchanged, and in the pre-transmission procedure, a modem function usable at the partner terminal is determined. In the case where 17 modem functions are included, modem training is performed in this state.

By this modem training, V.V. 17
If it is determined that the modem function can be used, the subsequent image information communication operation is performed according to V.30. 17 This is performed using the modem function.

Also, V.V. 1
If it is determined that the modem function cannot be used, the modem speed is reduced by one step to V.7. DSP1 to 29 modem function
Then, the modem training is switched again and the modem training is executed again. This modem training operation is repeatedly performed until a usable modem function is determined.

The switching of the modem function of the DSP 11 is as follows.
As described above, first, the CPU 1 notifies the DSP 11 of the modem function to be switched to, the DSP 11 recognizes the program number corresponding to the notified modem function, and notifies the CPU 1 of the program number. Also,
If the same modem function as that currently in use is specified, the CPU 1 is notified to that effect.

When the program number is notified from the DSP 11, the CPU 1 sets the D number corresponding to the program number.
Read the SP program data from ROM2 and read DS
When the data transfer is completed, the
Notify SP11. When the same modem function is notified from the DSP 11, the DSP program data is not transferred.

Also, the DSP 11 sends the DSP
When the program data is transferred, the program data is stored in the built-in RAM. When the CPU 1 is notified that the data transfer has been completed, the data storing operation is completed and the DSP program data stored in the built-in RAM is started.

Accordingly, thereafter, the DSP 11
It functions as a group 3 facsimile modem having a modem function newly notified from PU1.

The switching operation of such a modem function is as follows.
Each time the stage before the image information transmission or the phase B after the signal EOM is notified as the post-transmission procedure signal is executed, it is executed between the transmitting and receiving terminals.
Each time the PU1 transmits the corresponding modem function to the DSP 11
To (re) set.

FIG. 3 shows an example of processing executed when the CPU 1 sets the modem function for the DSP 11.

First, the CPU 1 notifies the DSP 11 of the modem function to be used (process 101).
The program number of the DSP program data corresponding to the modem function to be used is obtained (process 102).

Next, the CPU 1 checks whether or not the DSP 11 has notified that the modem function has not been changed (decision 1).
03), when the result of the determination 103 is YES, this processing ends.

When one of the program numbers is notified from the DSP 11 and the result of the judgment 103 is NO, the DSP program data corresponding to the notified program number is read out from the ROM 2, and
The program is transferred to the DSP 11 (process 104), and the process 104 is executed until the data transfer of the DSP program data is completed (NO loop of the judgment 105).

When the data transfer of the DSP program data is completed and the result of determination 105 is YES, the CPU 1
Notifies the DSP 11 that the data transfer has been completed (step 106), and ends this processing.

FIG. 4 shows an example of processing relating to switching of the modem function executed by the control program of the DSP 11.

First, the CPU 1 waits for the notification of the modem function (NO loop of decision 201).
When the modem function is notified from PU1 (the result of determination 201 is YES), the currently set modem function is acquired (process 202).

Next, it is checked whether or not the notified modem function has been changed from the currently set modem function (decision 203). If the same modem function is notified and the result of the decision 203 is NO, Then, the CPU 1 is notified that there is no change in the modem function (step 204), and the process is terminated.

When the modem function is changed and the result of determination 203 is YES, a program number stored in advance corresponding to the modem function notified from the CPU 1 is obtained, and the program number is changed. C
Notification is sent to PU1 (process 205).

Thereafter, since the corresponding DSP program data is transferred from the CPU 1, the transferred DSP program data is received and stored in the built-in RAM (step 206). The process is repeated until the CPU 1 notifies the end of the data transfer (NO loop of the judgment 207).

When the end of the data transfer is notified from the CPU 1 and the result of the judgment 207 becomes YES, the built-in R
Execution of the DSP program data stored in the AM is started (process 208), and this process ends.

In the above description of the operation, group 3
Although the case where the modem function of the facsimile modem is switched has been described, the same operation as the above-described operation is executed when the DSP 11 is to realize the data modem function.

As described above, in this embodiment, the DSP 1
DSP program data to be stored in the internal RAM 1 is stored in a ROM 2 accessible by the CPU 1, and necessary DSP program data transfer is realized by the function of the CPU 1. The number of ROMs can be limited to one, and the size of the device can be reduced, and the cost of the device can be reduced.

Further, since the ROM 2 can be arranged in a memory space accessible by the CPU 1, it is possible to store more DSP program data, whereby various functions can be realized by the DSP 11. Therefore, the function of the group 3 facsimile apparatus can be expanded at lower cost.

In the above embodiment, the CPU 1
And the DSP 11 are connected via the DSP interface circuit 12, and data exchange between the CPU 1 and the DSP 11 is performed via the DSP interface circuit 12. The DSP 11 is connected to the bus (internal bus 13) of the CPU 1. By providing a function of connecting and exchanging data via the internal bus 13, the DSP interface circuit 12 can be omitted.

FIG. 5 shows a configuration example of a group 3 facsimile apparatus according to another embodiment of the present invention. In addition,
In this figure, the same parts as those in FIG. 1 and corresponding parts are denoted by the same reference numerals.

In the figure, a CPU (central processing unit) 1
Performs a control process of each unit of the group 3 facsimile apparatus and a predetermined group 3 facsimile transmission control procedure process. The ROM 2 executes a control process program executed by the CPU 1 and a control process program executed by the CPU 1. Various necessary data such as DSP1
5 (to be described later) stores the DSP program data and the like, and the RAM 3 constitutes a work area of the CPU 1 and stores various information unique to the group 3 facsimile apparatus. The clock circuit 4 is for outputting current time information.

The scanner 5 is for reading an original image at a predetermined resolution, the plotter 6 is for recording and outputting an image at a predetermined resolution, and the operation display unit 7 is a facsimile apparatus. To operate,
It consists of various operation keys and various indicators.

The encoding / decoding section 8 encodes and compresses the image signal and decodes the encoded and compressed image information into the original image signal.
This is for storing a large number of image information in a coded and compressed state.

The network controller 10 is for connecting the group 3 facsimile apparatus to the analog public network PSTN, and has an automatic transmission / reception function.

The DSP 11 is for realizing a group 3 facsimile modem function and a data modem function. The DSP 11 stores a RAM for storing program data to be executed, and a control program for performing various management control of itself. And has a function of connecting to a bus (internal bus 13 (described later)) of the CPU 1 and accessing data via the internal bus 13. Further, the DSP 11 exchanges transmission / reception signals on the line side with the network control device 10. Here, the group 3 facsimile modem function includes a low-speed modem function (V.21 modem) for exchanging transmission procedure signals and a high-speed modem function (V.17 modem, V.21 modem) mainly for exchanging image information. 34 modem, V.34.
29 modem, V.29. 27ter modem, etc.).

These CPU1, ROM2, RAM
3, clock circuit 4, scanner 5, plotter 6, operation display unit 7, encoding / decoding unit 8, image storage device 9, network control device 1.
0 and the DSP 15 are connected to the internal bus 13, and data exchange between these elements is mainly performed through the internal bus 13.

Further, the CPU 1 and the DSP 15
By incorporating the semiconductor device in the same semiconductor device ASICb, the number of components constituting the group 3 facsimile device can be reduced.

In each of the embodiments described above, the case where the present invention is applied to a group 3 facsimile apparatus has been described. However, the present invention uses a DSP such as another electronic apparatus, data processing apparatus or communication terminal apparatus. The same applies to electronic devices.

[0064]

As described above, according to the present invention,
A CPU for controlling the data processing device main body, a DSP for incorporating a RAM for storing execution program data and realizing device functions, and a CPU connected to a bus of the CPU and executed by the CPU. A ROM that stores at least processing program data and DSP processing program data to be executed by the DSP; and a DSP interface unit for connecting the CPU and the DSP. The CPU performs processing prior to the start of the DSP processing. Reading the DSP processing program data from the ROM, transferring the DSP processing program data to the DSP via the DSP interface means, and the DSP processing the DSP processing program data input from the CPU via the DSP interface means. Save to the above RAM and finish saving Then, since the execution of the DSP processing program stored in the RAM is started, the number of external ROMs required for the apparatus can be limited to one, and the apparatus can be downsized. At the same time, the effect that the apparatus cost can be reduced is obtained.

Also, a CPU for controlling the main body of the data processing apparatus, and a RAM connected to the bus of the CPU and for storing execution program data are incorporated therein.
A DSP for realizing device functions, a ROM connected to a bus of the CPU and storing at least CPU processing program data to be executed by the CPU and DSP processing program data to be executed by the DSP;
Prior to the start of the DSP processing, the PU reads the ROM
From the DSP processing program data,
The DSP transfers the DSP processing program data input from the CPU to the RAM.
When the saving is completed, the execution of the DSP processing program saved in the RAM is started, so that the number of external ROMs required for the device can be limited to one. Can be reduced, and the cost of the apparatus can be reduced.

Further, a CPU for controlling the communication terminal device main body and an RA for storing execution program data are provided.
M, a DSP for realizing a modem function, and a CP connected to the CPU bus and executed by the CPU.
ROM storing at least U processing program data and modem processing program data to be executed by the DSP
And a DSP for connecting the CPU and the DSP
Interface means, wherein the CPU comprises the DS
Prior to the start of the processing of P, the modem processing program data is read from the ROM and transferred to the DSP via the DSP interface means.
Communicates with the CP via the DSP interface means.
The modem processing program data input from U is stored in the RAM, and when the storage is completed, the modem processing program stored in the RAM is executed. Therefore, the number of external ROMs required for the device is reduced by one. In this case, the size of the device can be reduced, and the cost of the device can be reduced.

A DSP for controlling a communication terminal device main body, a DSP for connecting to a bus of the CPU and having a built-in RAM for storing execution program data, and for realizing a modem function, A ROM connected to a bus of the CPU and storing at least CPU processing program data executed by the CPU and modem processing program data executed by the DSP;
U reads the modem processing program data from the ROM and transfers it to the DSP prior to the start of the DSP processing, and the DSP stores the modem processing program data input from the CPU in the RAM. When the storage is completed, the execution of the modem processing program stored in the RAM is started, so that the number of external ROMs required for the apparatus can be limited to one, and the apparatus can be downsized. And at the same time, it is possible to reduce the cost of the apparatus.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a group 3 facsimile apparatus according to one embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a manner of dividing a storage area of program data stored in a ROM 2 and an example of a manner of storing DSP program data.

FIG. 3 is a flowchart showing an example of processing executed when the CPU 1 sets a modem function for the DSP 11.

FIG. 4 is a flowchart illustrating an example of a process related to switching of a modem function executed by a control program of the DSP 11;

FIG. 5 is a block diagram showing a configuration example of a group 3 facsimile apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 1 CPU (Central Processing Unit) 2 ROM (Read Only Memory) 11, 15 DSP (Digital Signal Processing Unit)

Claims (12)

[Claims] 1. A C for controlling a data processing apparatus main body.
A built-in PU, a RAM for storing execution program data, and a DSP for realizing device functions; and a C connected to the CPU bus and executed by the CPU.
PU processing program data and D executed by the DSP
RO storing at least SP processing program data
M; and DSP interface means for connecting the CPU and the DSP. The CPU reads the DSP processing program data from the ROM prior to the start of the DSP processing, and executes the DSP interface means. Through the above D
Transfer to the SP, the DSP saves the DSP processing program data input from the CPU via the DSP interface means in the RAM, and when the saving is completed,
A data processing apparatus for starting execution of the DSP processing program stored in the RAM. 2. The ROM stores a plurality of the DSP processing program data.
2. The data processing apparatus according to claim 1, wherein the processing program data for the DSP corresponding to the function of the apparatus to be executed by the P is read and transferred to the DSP via the DSP interface means. 3. The data processing apparatus according to claim 1, wherein said CPU, said DSP, and said DSP interface means are incorporated in the same semiconductor device. 4. A C for controlling a data processing device main body.
A PU for connecting to a bus of the CPU and having a built-in RAM for storing execution program data and realizing device functions; and a C / C connected to the bus of the CPU and executed by the CPU.
PU processing program data and D executed by the DSP
RO storing at least SP processing program data
M, the CPU reads the DSP processing program data from the ROM and transfers the DSP processing program data to the DSP prior to the start of the DSP processing, and the DSP executes the DSP processing program input from the CPU. A data processing device, wherein data is stored in the RAM, and when the storage is completed, execution of the DSP processing program stored in the RAM is started. 5. The ROM stores a plurality of the DSP processing program data, and the CPU stores the DSP processing program data.
5. The data processing device according to claim 4, wherein said DSP process program data corresponding to the device function to be executed by P is read and transferred to said DSP. 6. The data processing device according to claim 4, wherein the CPU and the DSP are incorporated in the same semiconductor device. 7. A CP for controlling a communication terminal device main body.
U, a built-in RAM for storing execution program data, a DSP for implementing a modem function, and a C connected to the CPU bus and executed by the CPU.
ROM storing at least PU processing program data and modem processing program data to be executed by the DSP
And DSP interface means for connecting the CPU and the DSP. The CPU reads the modem processing program data from the ROM before starting the processing of the DSP, and via the DSP interface means. , DS above
P, the DSP stores the modem processing program data input from the CPU via the DSP interface means in the RAM, and upon completion of the storage, executes the modem processing program stored in the RAM. A communication terminal device. 8. The ROM stores a plurality of the modem processing program data, and the CPU
8. The communication terminal device according to claim 7, wherein said modem processing program data corresponding to a modem function to be executed is read out and transferred to said DSP via said DSP interface means. 9. The communication terminal device according to claim 7, wherein said CPU, said DSP and said DSP interface means are incorporated in the same semiconductor device. 10. A C for controlling a communication terminal device main body.
A PU for connecting to a bus of the CPU and having a built-in RAM for storing execution program data and realizing a modem function; and a C / C connected to the bus of the CPU and executed by the CPU.
ROM storing at least PU processing program data and modem processing program data to be executed by the DSP
The CPU reads the modem processing program data from the ROM and transfers the data to the DSP prior to the start of the DSP processing, and the DSP reads the modem processing program data input from the CPU. A communication terminal device, wherein the communication terminal device is stored in a RAM, and when the storage is completed, execution of the modem processing program stored in the RAM is started. 11. The ROM stores a plurality of the modem processing program data, and the CPU
11. The communication terminal device according to claim 10, wherein the modem processing program data corresponding to a modem function to be executed by P is read and transferred to the DSP. 12. The communication terminal device according to claim 10, wherein said CPU and said DSP are incorporated in the same semiconductor device.