JP2002208886A - Portable terminal equipment, storage data updating method and firmware-updating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely update an internal program, such firmware. SOLUTION: When a first CPU 10 cannot receive an ACK signal returned for the purpose of informing confirmation from a second CPU 11, while data are transferred in a system fitted to a program for update, which the second CPU 11 performs, it transmits an output switching instruction to a protocol converter 15. The protocol converter 15 switches the output destination of serial data in a serial analysis part 16 to a protocol conversion processing part 17 from a serial line 18. When the protocol conversion processing part 17 receives serial data from the serial analysis part 16, it extracts a signal for transferring data to the second CPU 11 and transmits it. As a result, data for rewriting a storage content in a non-volatile memory 14 can be transferred in a system which is suitable for boundary scanning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal capable of updating an internal program such as firmware, and more particularly to a portable terminal capable of reliably updating an internal program.

[0002]

2. Description of the Related Art For example, a portable terminal device such as a portable telephone having a configuration as shown in FIG. 8 has been known so that an internal program such as firmware can be updated.

[0003] In the portable terminal device having the configuration shown in FIG. 8, a serial input terminal 54 that can be connected to an external system such as a personal computer is used to update firmware stored and stored in a nonvolatile memory 64. Data including the update program is input. At this time, the configuration management CPU 60
Transfers the data input from the serial input terminal 54 to the target CPU 61,
4 enables the storage contents to be rewritten. The target CPU 61 stores the update program in the RA
The firmware can be updated by, for example, developing the program into M63 and executing the program.

[0004]

In the above-mentioned prior art, during the update of the firmware, for example, when there is an error in the update program or when the power supply is cut off momentarily,
When a problem occurred, the firmware could not be updated in some cases. That is, for example, if a failure occurs during the rewriting of the storage contents in the nonvolatile memory 64 shown in FIG. 8, the update program and data developed in the RAM 63 are lost, and thereafter, the nonvolatile memory 64
Could not be written. When such a problem occurs, work such as disassembling the portable terminal device itself and replacing the non-volatile memory 64 is required, and there is a problem that updating of an internal program such as firmware becomes difficult.

[0005] The present invention has been made in view of the above circumstances, and has as its object to provide a portable terminal device capable of reliably updating an internal program such as firmware.

[0006]

To achieve the above object, a portable terminal device according to a first aspect of the present invention has a nonvolatile memory for storing and storing firmware, and a boundary scan architecture. A processor capable of executing a program for updating firmware stored in the non-volatile memory, and externally inputting data including a program for updating firmware stored in the non-volatile memory Input means, and transfer processing means for transferring data input by the input means to the processor and enabling rewriting of storage content in the nonvolatile memory, wherein the transfer processing means transfers the data to the processor. A program for updating firmware according to the operation state of the processor. It switched and format adapted to the beam, the format compatible with the boundary scan, characterized in that.

According to the present invention, the transfer processing means converts the data to be transferred to the processor into a format compatible with a program for updating the firmware and a format compatible with the boundary scan in accordance with the operation state of the processor. Can be switched with. Thus, even when the processor cannot execute the program for updating the firmware, the firmware stored in the nonvolatile memory can be updated by the boundary scan. That is, the firmware can be reliably updated.

[0008] For example, the transfer processing means includes a data format switching means for switching data to be transferred to the processor between a format adapted to a program for updating firmware and a format adapted to boundary scan; It is determined whether or not a signal notifying the confirmation returned in response to the data transfer has been received.If it is determined that the signal has been received, the format of the data to be transferred to the processor is adapted to the program for updating the firmware. The operation of the data format switching means is set in order to set the format, and if it is determined that the data format switching means has not been received, the data format switching means is controlled so that the format of the data transferred to the processor is adapted to the boundary scan. It is desirable to provide switching control means for setting the operation.

Alternatively, the transfer processing means converts the data to be transferred to the processor in accordance with a control signal input by the input means into a format adapted to a program for updating firmware and adapted to a boundary scan. Data format switching means for switching between the data formats.

Preferably, the processor executes firmware stored in the nonvolatile memory.

More specifically, the processor includes a plurality of input / output pins, a core logic for executing firmware stored in the non-volatile memory, and a plurality of input / output pins between the plurality of input / output pins and the core logic. A plurality of cells that are inserted and connected in a chain, and a controller that controls the plurality of cells and transfers data to be written to the nonvolatile memory by boundary scan, wherein the controller includes: When data in a format suitable for the boundary scan is transferred, a control process for the boundary scan is executed, and the transfer data is written to the nonvolatile memory, whereby the firmware stored in the nonvolatile memory is written. It is desirable to update.

A storage data updating method according to a second aspect of the present invention is a method for rewriting storage data in a non-volatile memory built in a portable terminal device, wherein the method is used as a shift register for shifting data. A processor built in the portable terminal device, comprising a plurality of cells inserted between a plurality of input / output pins and core logic to function and connected in a chain, rewrites stored data in the nonvolatile memory. A first data rewriting step of executing a program for storing data in the non-volatile memory, and executing the program for storing data rewriting in the first data rewriting step. Serial data containing data to be written to volatile memory,
A data transfer step of transferring the data to the processor; a determination step of determining whether a signal for notifying confirmation is returned from the processor in response to the transfer of the serial data in the data transfer step; If it is determined in step that the signal for notifying confirmation is not returned, the processor inputs a signal including data for writing to the nonvolatile memory using the plurality of cells to the processor. A data input step of shifting data between the plurality of cells according to a signal input to the processor in the signal input step, and coupling the plurality of input / output pins to the nonvolatile memory. Rewriting stored data in the nonvolatile memory by outputting data from input / output pins And a second data rewriting step, characterized in that.

According to the present invention, when it is determined in the determining step that the signal for notifying the confirmation has not been returned from the processor in response to the transfer of the serial data in the data transfer step, the processor determines whether or not the plurality of signals have been transmitted. A signal including data to be written to the nonvolatile memory using the cell is input to the processor. Thus, even when the processor cannot execute the storage data rewriting program, the storage data in the nonvolatile memory can be rewritten by the boundary scan. This makes it possible to reliably update the firmware stored in the nonvolatile memory.

A firmware updating method according to a third aspect of the present invention has a nonvolatile memory for storing and storing firmware, and has a boundary scan architecture, and updates the firmware stored in the nonvolatile memory. And a processor capable of executing a program for executing a program for updating the firmware stored in the nonvolatile memory. An input step of inputting data including a program for updating from outside the portable terminal device, and transferring the data input in the input step to the processor to rewrite contents stored in the nonvolatile memory. And a transfer processing step for enabling The transfer processing step switches data to be transferred to the processor between a format adapted to a program for updating firmware and a format adapted to boundary scan according to an operation state of the processor. I do.

The transfer processing step includes a data format conversion step of switching data to be transferred to the processor between a format suitable for a program for updating firmware and a format suitable for boundary scan, and returning the data from the processor. It is determined whether or not a signal notifying the confirmation to be received is received, and if it is determined that the signal is received, the data format to be transferred to the processor is set to a format suitable for a program for updating firmware. Setting the operation in the conversion step, and if it is determined that the data has not been received, a switching control step of setting the operation in the data format conversion step so that the format of the data to be transferred to the processor is adapted to the boundary scan. It is desirable to provide.

Alternatively, in the transfer processing step, in accordance with the control signal input in the input step, the data to be transferred to the processor is converted into a format suitable for a program for updating firmware and a boundary scan. The method may include a data format conversion step of switching between a suitable format.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a portable terminal device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a portable terminal device 100 according to an embodiment of the present invention. The mobile terminal device 100 is, for example, a mobile phone that can communicate by transmitting and receiving wireless signals. As shown in FIG. 1, an antenna 1, a transmission / reception processing unit 2, a control processing unit 3, a serial line And a serial input terminal 4 coupled to the control processing unit 3 through the control unit 5.

The transmission / reception processing section 2 executes processing such as modulation and demodulation of a radio signal transmitted / received using the antenna 1 to enable communication.

The control processing unit 3 includes the portable terminal 100
For controlling the entire operation, for example, as shown in FIG. 2, first and second CPUs (Central Process
ng Unit) 10, 11, a memory 12, and a RAM (Rando
m Access Memory 13, a nonvolatile memory 14, and a protocol converter 15.

The first CPU 10 is, for example, an MMI (Man-Machine) using a display or a keypad (not shown).
Interface) is a configuration management processor that executes processing and the like for implementing the interface. In addition, the first CPU 10
The serial data input from the serial input terminal 4 via the serial line 5 is transferred to the second CPU 11 via the protocol converter 15.

The second CPU 11 has a nonvolatile memory 14
Is a processor that executes an internal program such as firmware stored in the CPU and executes, for example, data conversion processing and the like according to a communication protocol. Here, the second C
The PU 11 includes, for example, as shown in FIG. 3, a plurality of boundary scan cells 21A, 21A corresponding to a plurality of input / output pins 20A, 20B,.
B,..., 21L, a TAP (Test Access Port) controller 22, and a core logic 23 functioning as a processor that executes firmware and the like. That is, for example, the second CPU 11
(Institute of Electrical and Electronic Engineer
s) The boundary that has become the standard of 1149.1
JTAG (Joint Test Action Grou
It has a boundary scan architecture conforming to p). The number of input / output pins and the boundary
The number of scan cells can be set arbitrarily according to the specifications of the second CPU 11.

A plurality of input / output pins 20A, 20B,.
0L is for inputting a data signal or a control signal to the second CPU 11 or outputting a data signal or a control signal from the second CPU 11. Here, the input / output pin 20A is connected to the second CPU 11 by the protocol converter 1.
5 for inputting a TDI (Test Data Input) signal supplied from Also, the input / output pin 20L is
This is for outputting a TDO (Test Data Output) signal from the second CPU 11. Further, for example, the input / output pins 20I, 20J, and 20K are coupled to the nonvolatile memory 14, and when JTAG is used, the data transferred from the first CPU 10 using the TDI signal is transferred to the nonvolatile memory 14. Writable. Here, input / output pin 2
The signal lines connecting between the non-volatile memory 14 and the buses 0I, 20J, and 20K include an address bus and a data bus.

A plurality of boundary scan cells 21
, 21L are a plurality of input / output pins 20A,
20B,..., 20L and the core logic 23. Here, the plurality of boundary scan cells 21A, 21B,..., 21L are coupled to the input / output pin 20L from the boundary scan cell 21A coupled to the input / output pin 20A, for example. Toward the boundary scan cell 21L,
They are connected in a chain to function as a shift register for shifting data (generally called a boundary scan register).

The TAP controller 22 controls the plurality of boundary scan cells 21A, 21B,..., 21L to transfer the data to be written to the nonvolatile memory 14 using the verification operation of the core logic 23 or JTAG. This is for executing a write data transfer operation or the like. Here, the TAP controller 22 controls the TMS supplied from the protocol converter 15 under the control of the first CPU 10.
A write data transfer operation to the nonvolatile memory 14 is executed in accordance with a (Test Mode Select) signal, a TCK (Test Clock) signal, and an nTRST (Test Reset) signal. In addition,
The nTRST signal is an optional signal, and its use / non-use can be arbitrarily selected.

The memory 12 shown in FIG.
0 stores programs to be executed, data, and the like.

The RAM 13 is for developing a program to be executed by the second CPU 11 and temporarily storing data.

The nonvolatile memory 14 is, for example, a flash EEPROM (Electronically Erasable and Programmable).
A non-volatile rewritable memory such as an “able read only memory” for storing and storing internal programs such as firmware executed by the second CPU 11.

The protocol converter 15 includes a first CPU 1
This is for switching the format of data transferred from 0 to the second CPU 11, and includes a serial analysis unit 16 and a protocol conversion processing unit 17.

The serial analysis unit 16 includes a first CPU 10
This is for analyzing the serial data sent from the PC and executing path switching and data transfer using a serial interface. That is, the serial analysis unit 16
The path switching is executed in accordance with the control command received from the first CPU 10 to switch between data transfer using the serial interface and data transfer using the JTAG interface. At this time, when executing data transfer using the serial interface, the serial analysis unit 16 sends the transfer data received from the first CPU 10 to the second CPU 11 via the serial line 18. On the other hand, when performing data transfer using the JTAG interface, the serial analysis unit 16 sends the transfer data received from the first CPU 10 to the protocol conversion processing unit 17.

The protocol conversion processing unit 17 converts the serial data received from the serial analysis unit 16 into a signal conforming to the JTAG boundary scan method, and transfers the signal to the second CPU 11. That is, the protocol conversion processing unit 17
A TDI signal, a TMS signal, and a TCK signal are generated based on the serial data received from the CPU, and are input to the second CPU 11 via a JTAG interface.

The serial input terminal 4 is connected via a serial line 5 to a first CPU 10 included in the control processing unit 3, and is connected to an external system such as a personal computer to update a program such as firmware. Of this portable terminal device 100
To enter.

The operation of portable terminal device 100 according to the embodiment of the present invention will be described below. This portable terminal device 1
Reference numeral 00 denotes that an external system such as a personal computer is connected to the serial input terminal 4 so that an update program or the like for rewriting an internal program such as firmware stored in the nonvolatile memory 14 can be acquired.

At this time, the serial input terminal 4 receives the data input from the outside via the serial line 5 and the first CP.
Send to U10.

For example, when the first CPU 10 receives data for updating the firmware from the serial input terminal 4, it controls the data transfer operation to the nonvolatile memory 14 according to the processing sequence illustrated in FIG.

That is, when the first CPU 10 receives the firmware communication data from the serial input terminal 4, the first CPU 10
To the firmware update request (step S
1).

Here, the second CPU 11 has a RAM 13
When a program for updating the firmware is developed in the non-volatile memory 14 and the contents stored in the non-volatile memory 14 can be rewritten, an ACK (AC
Knowledge) signal is returned to the first CPU 10 (step S2).

When the first CPU 10 receives the ACK signal sent from the second CPU 11, the first CPU 10
5 is set to enable data transfer using the serial interface, and a data transfer operation for updating the firmware is started (step S3).

At this time, the protocol converter 15 transmits the serial data received by the serial analyzer 16 from the first CPU 10.
The transfer data from the first CPU 10 is transferred via the serial line 18 to the second CPU
Send to 11. As a result, data for rewriting the content stored in the nonvolatile memory 14 can be transferred in a format suitable for the update program executed by the second CPU 11.

The second CPU 11 receives the transfer data from the first CPU 10, expands the update program in the RAM 13, and rewrites the contents stored in the nonvolatile memory 14 (step S4). Also, the second C
During execution of the update program, the PU 11 receives an ACK for responding to the data transfer each time a predetermined timing arrives, for example, when the reception of the predetermined amount of data transferred from the first CPU 10 is completed.
A signal is sent to the first CPU 10.

Here, the first CPU 10 is, for example, a second CPU.
If an error occurs in the update program executed by the CPU 11 or the power supply is momentarily interrupted, the ACK signal from the second CPU 11 cannot be received (step S5).

In this case, the first CPU 10 sends an output switching command to the protocol converter 15 (step S6),
Switch to data transfer operation using JTAG. Here, the protocol converter 15 specifies the output switching command and executes the path switching according to the format of the serial data received by the serial analysis unit 16 from the first CPU 10. As a result, the serial analysis unit 16 switches the output destination of the serial data from the serial line 18 to the protocol conversion processing unit 17.

Thereafter, the first CPU 10 executes the JTAG
The serial data including the data to be written to the non-volatile memory 14 is transmitted to the protocol converter 15 by using, and the data transfer operation for updating the firmware is restarted (step S7).

At this time, upon receiving the serial data from the serial analysis unit 16, the protocol conversion processing unit 17
A TDI signal and a TMS signal for transferring data to the second CPU 11 via the TAG interface are extracted. The protocol conversion processing unit 17 converts the extracted TDI signal and TMS signal together with the TCK signal defining the operation timing of the TAP controller 22 into the second CPU 1
Send to 1. As a result, the boundary using JTAG
Data for rewriting the storage content in the nonvolatile memory 14 can be transferred in a format suitable for scanning.

The second CPU 11 sends a TMS signal or TCK
TDI input from the input / output pin 20A according to a control signal received by the TAP controller 22, such as a signal.
The signal is fetched and stored in the boundary scan cell 21A.

The TAP controller 22 operates at the boundary
The storage data is shifted from the scan cell 21A to the boundary scan cell 21L, so that the TDO signal can be output from the input / output pin 20L.

Here, the TAP controller 22 executes a control process for the boundary scan such that the TAP controller 22 outputs the data to the nonvolatile memory 14 each time the data stored in the boundary scan cells 21I, 21J, and 21K is exchanged. Thereby, the TAP controller 22
By controlling the address bus and the data bus, the transfer data can be written into the nonvolatile memory 14 (step S
8). This control processing is performed when the update program or data developed in the RAM 13 is lost or when the
It can be executed even when the operation of the logic 23 is stopped, and the contents stored in the nonvolatile memory 14 can be reliably rewritten. Thereby, even if a problem occurs, for example, when an error occurs in the update program or when the power supply is momentarily interrupted,
Internal programs such as firmware can be reliably updated.

If the first CPU 10 cannot receive the ACK signal returned from the second CPU 11 in step S2, it jumps to step S6 and immediately uses JTAG. Perform a data transfer operation. Thus, even when the update program cannot be executed, the data stored in the nonvolatile memory 14 can be rewritten by the data transfer operation using the JTAG.

As described above, the first CPU 10 and the protocol converter 15 transmit data to be transferred to the second CPU 11 in accordance with the operation state of the second CPU 11 as to whether or not the ACK signal can be returned. Can be switched between a format suitable for an update program and a format suitable for boundary scan using JTAG. Thus, even when the second CPU 11 cannot execute the update program, the storage contents in the nonvolatile memory 14 can be rewritten by the boundary scan using the JTAG, and the firmware can be surely updated. Can be.

Next, the data transfer operation executed by the first CPU 10 in steps S3 to S7 in the processing sequence shown in FIG. 4 will be described in more detail with reference to the flowchart shown in FIG.

When the first CPU 10 starts the data transfer operation for updating the firmware in step S3 in the processing sequence shown in FIG. 4, the first CPU 10 transfers the data to be transferred to the second CPU 11 via the protocol converter 15. It is sent (step S10). This data is data to be input to the second CPU 11 as serial data, and is transmitted from the protocol converter 15 to the serial line 18.
Is transferred to the second CPU 11.

At this time, the first CPU 10 sends the second CP
It is determined whether an ACK signal for notifying the confirmation from U11 has been received (step S11).

When determining that an ACK signal has been received (YES in step S11), first CPU 10 determines whether data transfer has been completed (step S12).
When determining that the data transfer is completed (YES in step S12), first CPU 10 stops the data transfer operation for updating the firmware. On the other hand, if the first CPU 10 determines that the data transfer has not been completed (NO in step S12), the first CPU 10 executes the processing in step S12.
Returning to step S10, the transmission of data is continued.

When the first CPU 10 determines in step S11 that the ACK signal has not been received (NO in step S11), the first CPU 10 uses the JTAG interface from the data transfer using the serial interface. An output switching command for switching to the data transfer is sent to the protocol converter 15 (step S13).

Thereafter, the first CPU 10 executes the JTAG
Is transmitted to the protocol converter 15 (step S14). When the data transfer using JTAG is completed, the data transfer operation for updating the firmware is completed.

As described above, when a problem occurs, for example, when an error occurs in the update program or when the power supply is momentarily interrupted, the nonvolatile memory is used by using the boundary scan method such as JTAG. By making the stored contents rewritable, the internal programs such as firmware can be reliably updated.

A mobile terminal device 1 such as a mobile phone
In the case of 00, the connectors that can be installed outside the housing are extremely limited as the size is reduced. In addition, since a normal connector plays a plurality of roles, it is difficult to separately provide a dedicated line used only for updating firmware. Therefore, the data including the upgrade program is input to the portable terminal device 100 using the serial input terminal 4 and executed. At this time, even if a problem occurs, the firmware can be reliably updated by executing data writing to the nonvolatile memory 14 using JTAG.

As described above, according to the present invention,
When a problem occurs during the rewriting of the storage contents in the nonvolatile memory 14 by executing the upgrade program, switching to the data transfer operation using the JTAG is performed and the rewriting of the storage contents in the nonvolatile memory 14 is continued. Can be. Even when the upgrade program cannot be executed, the data stored in the nonvolatile memory 14 can be rewritten by the data transfer operation using the JTAG. As a result, an internal program such as firmware can be reliably updated.

The present invention is not limited to the above embodiment, and various modifications and applications are possible. For example, in the above embodiment, the protocol converter 15 is described as being provided, but the present invention is not limited to this.
May include substantially the same function as the protocol converter 15. In this case, for example, as shown in FIG. 6, the first CPU 10 and the second CPU 11 are connected via a serial interface and a JTAG interface, and are controlled according to a program executed by the first CPU 10. What is necessary is just to switch between the data transfer operation using the serial interface and the data transfer operation using the JTAG interface.

Further, in the above embodiment, the portable terminal device 100 is provided with the first CPU 10 and the memory 12 for configuration management.
However, the present invention is not limited to this. For example, the serial input terminal 4 and the protocol converter 15 may be connected via the serial line 5 as shown in FIG. In this case, the external system coupled to the serial input terminal 4 has substantially the same function as the first CPU 10 in the above embodiment, so that the data transfer operation using the serial interface and J
It is possible to switch between the data transfer operation using the TAG interface. The protocol converter 15 performs path switching according to a control signal such as an output switching command included in data input from the serial input terminal 4.

[0061]

As described above, according to the present invention, when a program for updating firmware becomes unexecutable, a boundary called JTAG is used.
The content stored in the nonvolatile memory can be rewritten using the scan method. This makes it possible to reliably update an internal program such as firmware.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a portable terminal device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a control processing unit.

FIG. 3 is a diagram illustrating a configuration of a second CPU.

FIG. 4 is a processing sequence for describing an operation of the mobile terminal device according to the embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation of a first CPU.

FIG. 6 is a diagram showing a modification of the portable terminal device according to the embodiment of the present invention.

FIG. 7 is a diagram showing a modification of the portable terminal device according to the embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a conventional portable terminal device.

[Explanation of symbols]

 1, 51 Antenna 2, 52 Transmission / reception processing unit 3, 53 Control processing unit 4, 54 Serial input terminal 5, 18 Serial line 10, 11, 60, 61 CPU 12, 62 Memory 13, 63 RAM 14, 64 Non-volatile memory 15 Protocol converter 16 Serial analysis unit 17 Protocol conversion processing unit 20A-20L Input / output pins 21A-21L Boundary scan cell 22 TAP controller 23 Core logic 100 Mobile terminal device

Claims (9)

[Claims] A nonvolatile memory for storing and storing firmware; a processor having a boundary scan architecture and capable of executing a program for updating firmware stored in the nonvolatile memory; Input means for externally inputting data including a program for updating firmware stored in the non-volatile memory; and transferring data input by the input means to the processor and storing the data in the non-volatile memory. Transfer processing means that allows rewriting of the contents, the transfer processing means, the data to be transferred to the processor, according to the operating state of the processor, a format adapted to a program for updating firmware, Switch to a format compatible with boundary scan A mobile terminal device and butterflies. 2. A data format switching means for switching data to be transferred to the processor between a format suitable for a program for updating firmware and a format suitable for boundary scan, and the processor. It is determined whether or not a signal notifying the confirmation returned in response to the data transfer has been received.If it is determined that the signal has been received, the format of the data to be transferred to the processor is adapted to the program for updating the firmware. The operation of the data format switching means is set in order to set the format, and if it is determined that the data format switching means has not been received, the data format switching means is controlled so that the format of the data transferred to the processor is adapted to the boundary scan. The portable terminal according to claim 1, further comprising: a switching control unit configured to set an operation. Location. 3. The transfer processing means converts data to be transferred to the processor according to a control signal input by the input means into a format adapted to a program for updating firmware and adapted to a boundary scan. The portable terminal device according to claim 1, further comprising a data format switching unit configured to switch between the formats. 4. The portable terminal device according to claim 1, wherein the processor executes firmware stored in the non-volatile memory. 5. The processor, comprising: a plurality of input / output pins; a core logic for executing firmware stored in the nonvolatile memory; and a core inserted between the plurality of input / output pins and the core logic. A plurality of cells connected in a chain, and a controller that controls the plurality of cells and transfers data to be written to the nonvolatile memory by boundary scan, wherein the controller performs boundary scan by the transfer processing unit. When data in a format conforming to
By executing control processing for boundary scan and writing transfer data to the nonvolatile memory,
The mobile terminal device according to claim 1, wherein firmware stored in the nonvolatile memory is updated. 6. A storage data updating method for rewriting storage data in a nonvolatile memory built in a portable terminal device, comprising a plurality of input / output pins, a core logic, and a plurality of input / output pins to function as a shift register for shifting data. A processor embedded in the portable terminal device having a plurality of cells inserted between them and connected in a chain, and executing a program for rewriting storage data in the nonvolatile memory, A first data rewriting step of rewriting the storage data in the first step, and a serial program including data to be written in the non-volatile memory by the processor executing a storage data rewriting program in the first data rewriting step. A data transfer step of transferring data to the processor; A determination step of determining whether a signal for notifying confirmation is returned from the processor in response to the transfer of serial data in the transfer step; and a signal for notifying confirmation is returned in the determination step. When it is determined that the data is not written, the processor uses the plurality of cells to write a signal including data for writing to the nonvolatile memory, a signal input step of inputting the signal to the processor, By shifting data between the plurality of cells according to a signal input to the processor and outputting data from an input / output pin coupled to the nonvolatile memory among the plurality of input / output pins, A second data rewriting step of rewriting data stored in the nonvolatile memory.憶 data update method. 7. A nonvolatile memory for storing and storing firmware, and a processor having a boundary scan architecture and capable of executing a program for updating the firmware stored in the nonvolatile memory. In the portable terminal device, a firmware update method for updating firmware stored in the non-volatile memory, wherein the data including a program for updating firmware stored in the non-volatile memory, An input step of inputting data from outside the portable terminal device; and a transfer processing step of transferring data input in the input step to the processor to enable rewriting of storage contents in the nonvolatile memory, The processing step includes the step of transferring the data to the processor. And a format in accordance with the operating state of the processor, adapted to a program for updating the firmware,
A firmware updating method, wherein the firmware is switched in a format suitable for a boundary scan. 8. A data format conversion step of switching data to be transferred to the processor between a format adapted to a program for updating firmware and a format adapted to boundary scan, and the processor comprises: It is determined whether or not a signal notifying the confirmation returned from is received.If it is determined that the signal has been received, the format of the data to be transferred to the processor is set to a format suitable for a program for updating firmware. When the operation in the data format conversion step is set and it is determined that the data has not been received, the switching control for setting the operation in the data format conversion step so that the format of the data to be transferred to the processor is adapted to the boundary scan. The method according to claim 7, comprising: The method of firmware update. 9. The transfer processing step according to the control signal input in the input step, converts the data to be transferred to the processor into a format adapted to a program for updating firmware and a boundary scan. The firmware update method according to claim 7, further comprising a data format conversion step of switching between a compatible format and a compatible format.