KR100606750B1 - Program downloading device for mobile phones - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication auxiliary device. In particular, when an abnormality occurs in a flash memory of a mobile phone, an apparatus for downloading a program by connecting a joint test action group (hereinafter, referred to as JTAG) It is about.

On the other hand, in the present invention, especially when some programs in the boot area are broken in the mobile phone with the MSM3000 chip supporting next-generation communication service, the wrong program is downloaded by connecting JTAG directly from the outside without disassembling the phone itself. Provide a device that can.

JTAG, MSM3000 Chip, Program Downloading

Description

App downloading device for mobile phones {apparatus for downloading program, which is used for handy set}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the overall device configuration for program downloading for a mobile phone according to the present invention.

2 is a diagram showing a detailed configuration of a system board for program downloading for a mobile phone according to the present invention.

3 is a diagram showing an internal configuration of a JTAG jig (JIG) for downloading a program for a mobile phone according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: computer 2: computer emulator

3: phone body 4: JTAG JIG

The present invention relates to a communication auxiliary device, and more particularly, to an apparatus for downloading a program by connecting a JTAG when an abnormality occurs in a flash memory of a mobile phone.

In general, mobile phones store some important programs in flash memory.

However, a phenomenon in which the program in the flash memory is broken often occurs. In the past, when an error occurs in the program of the flash memory, the phone itself has to be disassembled to replace the flash memory.

In particular, mobile phone manufacturers have recently introduced mobile phones employing MSM3000 (Mobile Station Modem 3000) chips.

In mobile phones with the MSM3000 chip supporting this next-generation communication service, some programs in the boot area are broken. In this case, the program cannot be downloaded again by connecting a general data cable.

Accordingly, in order to modify the program stored in the mobile phone as described above, the program is reloaded by forcibly connecting the following signals related to the JTAG to the computer emulator.

Signals related to JTAG include "VSYS" which is the power supply signal of the telephone system board, "3.0V_JTAG" of the computer emulator, data input signal "JTAG_TDIN" from the computer emulator, data output signal "JTAG_TDOUT" from the system board, synchronization Clock signal "JTAG_TCLK", CPU internal TAP control status signal "JTAG_TMS", system board initialization signal "JTAG_RST #", JTAG initialization signal "JTAG_TRST #" and entry signal to JTAG mode "JTAG_TMODE". The entry condition to the JTAG mode is when the value of the JTAG mode entry signal is 1 (JTAG_TMODE == 1) and the value of the JTAG initialization signal is 0 (JTAG_TRST # == 0).

In addition, in order to modify the program stored in the mobile phone, the simplest disassembly of the phone itself had to replace the flash memory.

An object of the present invention is to solve the above problems, especially in the case where some programs in the boot area is broken in a mobile phone with a built-in MSM3000 chip supporting next-generation communication services, without disassembling the phone itself Provides a device to download the wrong program by connecting JTAG directly.

Features of the program downloading device for a mobile phone for achieving the above object, the mobile phone body including a system board for JTAG connection, a computer emulator for executing an application for downloading a specific program using a computer, And a JTAG jig that selectively provides a signal path for JTAG connection between the phone body and the computer emulator.

Here, the system board for JTAG connection of the phone main body basically performs coding and decoding, and includes an MSM chip including pins for providing a plurality of signals for JTAG connection, and signals of the MSM chip for JTAG connection. An ICA outlet including pins for providing a plurality of signals operating in conformity with a logic gate; and a logic gate for transmitting a JTAG-related signal of the MSM chip to the ICA outlet according to a signal value of a mode operation signal for the JTAG connection; And a regulator for providing a constant voltage to the MSM chip.

In addition, the telephone main body includes a switching element to turn on the regulator of the system board according to a signal value of a mode operation signal for the JTAG connection when the JTAG jig is externally inserted into the telephone main body. More circuits are added.

In addition, the JTAG jig includes a regulator for supplying a constant power to the computer emulator when the JTAG jig is plugged into the telephone body from the outside, and the JTAG jig includes a power supply signal (VSYS) of the telephone system board. ), A signal (JTAG_TDIN) for inputting data from the computer emulator, a signal (JTAG_TDOUT) for outputting data from the system board, and a clock signal (JTAG_TCLK) for synchronizing the timing of the system board and the computer emulator. ), A TAP control state signal (JTAG_TMS) of the internal CPU of the MSM chip, a signal (JTAG_RST #) for initializing the state of the system board, a signal (JTAG_TRST #) for initializing the state of the JTAG jig, and the JTAG The mode operation signal (JTAG_TMODE) for the connection is used.

Hereinafter, a preferred embodiment of a program downloading apparatus for a mobile phone according to the present invention will be described with reference to the accompanying drawings.

In the present invention, when some programs stored in the mobile phone are broken, the JTAG is connected and corrected. In the present invention, a JTAG jig (JIG) for JTAG connection is used, and this JTAG jig can be commonly used for program downloading of all mobile phones regardless of currently available mobile phone models.

The existing premise that this integrated JTAG jig is possible is that the pin assignments of the ICA receptacles provided in all mobile phones are the same, so that all mobile phones use the same ICA connector.

In particular, the present invention connects the computer emulator and the telephone body directly to the JTAG jig from the outside when some programs in the boot area are broken in the mobile phone with the MSM3000 chip supporting the next-generation communication service. This is shown in FIG.

1 is a view showing the overall configuration of a device for downloading a program for a mobile phone according to the present invention, a computer (1) for providing an application for downloading the program and a specific program download in using the computer (1) A computer emulator 2 for executing an application for loading is provided, which is connected to the computer emulator 2 and the telephone body 3 by a JTAG jig 4 directly from the outside.

2 is a diagram showing a detailed configuration of a system board for downloading a program for a mobile phone according to the present invention. The system board is basically an MSM3000 chip 10, an ICA receptacle (ICA RECEPTACLE) 30, and an MSM3000 chip. 3V regulator 40 for providing a constant voltage at 3V. In addition, a logic gate 20 for transmitting a JTAG related signal of the MSM3000 chip 10 to the ICA outlet 30 by a signal TMODE for entering the JTAG mode is provided. When the TMODE signal value provided to the logic gate 20 is 0, it is a JTAG mode, while when the TMODE signal value is 1, it is a normal mode.

In addition, when the JTAG jig 4 is plugged into the telephone body 3 from the outside, a circuit for turning on the 3V regulator 40 for supplying a constant power to the system board is added. This circuit includes a transistor (switching element) that is turned on to turn on the 3V regulator 40 in accordance with the TMODE signal value. In addition, in this circuit for supplying constant power to the system board, when the user presses the power key provided in the telephone, the internal software recognizes this and makes the PS_HOLD signal value high, thereby causing the 3V regulator 40 to turn on. Turn on).

Several pins are allocated to the MSM3000 chip 10. Among the pins used for the program downloading of the present invention, JTAG_TDIN outputs a signal for inputting data of the computer emulator 1 to the ICA outlet 30. Pin, JTAG_TDOUT pin for outputting a signal for outputting data from the system board through the ICA receptacle 30, JTAG_TCLK pin for outputting a clock signal for synchronizing the timing of the system board and the computer emulator 1, and MSM3000 There are a JTAG_TMS pin for outputting a TAP control status signal of a CPU inside the chip, and a JTAG_TRST # pin for outputting a signal for initializing the state of a JTAG jig. In addition, the MSM3000 (10) chip has an AUX_PCM_TDOUT pin, an AUX_PCM_TDIN pin, an AUX_PCM_CLK pin, an AUX_PCM_SYNC pin, and an MSM_DP_RI pin.

Next, the ICA receptacle 30 includes a CAR_PCM_DOUT pin, a CAR_PCM_DIN pin, a CAR_PCM_CLK pin, a CAR_PCM_SYNC pin, and a CAR_DP_RI pin, which operate in matching with the pins allocated to the MSM3000 chip 10.

3 is a diagram illustrating an internal configuration of a JTAG jig (JIG) for downloading a program for a mobile phone according to the present invention.

In FIG. 3, the JTAG jig connects the system side ICA connector and the computer emulator side connector. In particular, the JTAG jig is kept at 3 V in the computer emulator 2 when the JTAG jig 4 is plugged into the telephone body 3 from the outside. 3V regulator 60 is provided for supplying a constant power supply. The 3V regulator 60 operates when the power signal VSYS provided when the JTAG jig 4 is plugged into the telephone main body 3 is input. The 3V regulator 60 is a constant power supply of 3V from the input power VSYS. Provide 3V_EMUL to the computer regulator (2).

In particular, the JTAG jig provides a signal path related to the JTAG connection between the telephone body 3 and the computer emulator 2, and the signals connected through each signal path except for the 3V_EMUL are listed below.

First, the power supply signal "VSYS" of the telephone system board, the data input signal "JTAG_TDIN" from the computer emulator, the data output signal "JTAG_TDOUT" from the system board, the clock signal "JTAG_TCLK" for synchronization, and the TAP control status signal inside the CPU. "JTAG_TMS", system board initialization signal "JTAG_RST #", JTAG initialization signal "JTAG_TRST #", and entry signal to JTAG mode "JTAG_TMODE".

Here, the entry condition to the JTAG mode is when the value of the JTAG mode entry signal is low (JTAG_TMODE == L). On the other hand, when JTAG_TMODE == H, it is a normal mode and is a mode for coding and decoding which is the original function of the MSM3000 chip. As described above, according to the present invention, the signal path for JTAG connection can be selected according to the JTAG_TMODE signal value. In addition, when JTAG_TMODE == L and the JTAG initialization signal JTAG_TRST # == H, the JTAG mode is entered.

When the JTAG jig 4 is inserted into the telephone main body 3 while the system board is in the pull-up state, the JTAG_TMODE signal value changes and the TMODE is in the JTAG mode state.

In particular, a high frequency coaxial pin (RF coaxial pin) is used for the system side ICA outlet of the present invention, which is for connecting a JTAG_TMODE signal.

By using the program downloading apparatus for a mobile phone according to the present invention described above, if an error occurs in the program embedded in the mobile phone, it is not necessary to disassemble the phone and replace the flash memory.

In particular, if some programs in the boot area are broken on the mobile phone with the MSM3000, the wrong program can be reloaded using the integrated jig for JTAG connection regardless of the phone model. The program modification is simple and the management cost is reduced.

Claims (5)

A mobile phone body including a system board for JTAG connection, A computer emulator that uses a computer to run applications for downloading specific programs, And a JTAG jig for selectively providing a signal path for JTAG connection between the telephone body and the computer emulator. According to claim 1, The system board for JTAG connection of the telephone body, An MSM chip that basically performs coding and decoding, and includes pins that provide multiple signals for JTAG connections, An ICA receptacle including pins providing a plurality of signals operating in conformity with signals of an MSM chip for the JTAG connection; A logic gate for transmitting a JTAG related signal of the MSM chip to the ICA outlet according to a signal value of a mode operation signal for the JTAG connection; And a regulator for providing a constant voltage to the MSM chip. The telephone body according to claim 2, wherein the telephone body includes: When the JTAG jig is plugged into the telephone body from the outside, a circuit including a switching element is further added to turn on the regulator of the system board according to a signal value of a mode operation signal for the JTAG connection. Program downloading device for mobile phone, characterized in that. The method of claim 1, wherein the JTAG jig, And a regulator for supplying constant power to the computer emulator when the JTAG jig is plugged into the telephone body from the outside. The system of claim 4, wherein the JTAG jig includes a power supply signal of the telephone system board, a signal for inputting data from the computer emulator, a signal for outputting data from the system board, and the system board and the A clock signal for synchronizing the timing of the computer emulator, a TAP control state signal of the internal CPU of the MSM chip, a signal for initializing the state of the system board, a signal for initializing the state of the JTAG jig, and the JTAG connection. A program downloading device for a mobile phone, characterized in that a mode operation signal is used.

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