JPH06112879A - Portable telephone set - Google Patents

Abstract

PURPOSE:To reduce a write time of program data by providing a function switching a transmission speed of input data at a high speed to an input section of the portable telephone set only when program data are written. CONSTITUTION:When a CPU recognizes a write request of program data from a personal computer 10 to an I/O section, a changeover circuit of the I/O section selects a transmission speed of input data from a usual 600bps into a high transmission speed 4.8kbps when the program is written. The program data are sent at the high speed of 4.8kbps immediately and a P/S conversion system 30 converts the data into serial data, which are inputted to a portable telephone set in which the data are converted into parallel data and written in a memory ROM. The program is written efficiently to each memory of n-sets of portable telephone sets with 1:n by connecting plural (n) output lines in parallel from one personal computer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone having an internal memory (ROM) for electrically writing a program specific to the mobile phone from the outside.

[0002]

2. Description of the Related Art A conventional mobile phone has an internal memory.
Optical so-called ROM writer is used to write the program peculiar to the mobile phone to the ROM, or the method of directly accessing the memory ROM is used. In that case,
Optical processing such as UV irradiation was required to erase the program written in the memory ROM. In order to electrically write and erase the program to and from the memory ROM, it was necessary to use a device capable of electrically writing and erasing. Even when using that device, if the transmission speed of the input data via the external interface is 600 bps at the normal time,
When writing to a memory with a storage capacity of 1 Mb, for example, with the external interface, the net write time is about 42
It took a minute.

[0003]

In other words, when a large amount of program data is written in the memory ROM of a mobile phone, if a conventional optical ROM writer or UV irradiation is used, the number of external tools will increase, and the existing tools will be used. There was a problem that it took too much time to write at a normal speed of 600 bps using the external interface of. It is an object of the present invention to reduce the writing time when writing a program using an existing external interface while avoiding an increase in external tools.

[0004]

The basic configuration of the present invention for achieving this object is to use a current external interface 20 with a personal computer 10 for sending a program, as shown in the principle diagram of FIG. Switching circuit 1 that switches the normal transmission speed (600 bps) to a high transmission speed (4.8 kbps) and inputs only when writing a program from the personal computer 10 through the external interface 20 while avoiding an increase in external tools. Is provided in the input / output I / O section of the mobile phone so as to shorten the time for writing and erasing the program data from the personal computer 10 to the memory ROM in the mobile phone.

[0005]

In the present invention, since the external interface 20 between the existing mobile phone and the personal computer 10 is used as it is, an increase in external tools can be avoided, and the mobile phone can efficiently store the memory ROM therein. Only when the program can be installed and the program from the personal computer 10 is written and erased via the external interface 20, the data transmission speed is increased and the data is input to the I / O unit. The time for writing and erasing data in the memory ROM is shortened.

[0006]

FIG. 2 shows the configuration of a mobile phone according to an embodiment of the present invention. Before the program data is input from the personal computer 10 to the I / O section of the mobile phone via the external interface 20,
Actually, a P / S conversion system 30 that converts parallel data P on the personal computer 10 side into serial data S is required.
Data is sent from 0 to the mobile phone via the P / S conversion system 30. After the CPU recognizes the program data write request signal from the personal computer 10 to the I / O section of the mobile phone, the switching circuit 1 of the I / O section sets the input data transmission speed to 600 It is possible to switch from bps to the high-speed transfer rate of 4.8 kbps when writing programs. PC 10
After confirming the switching change of the input transmission speed in the switching circuit 1 of the I / O section of the mobile phone, immediately after the high speed of 4.8 kb
Start sending the ps program data, convert it to serial data by the P / S conversion system 30, input it to the mobile phone, convert it again to parallel data inside the mobile phone, and then store it in memory
Written to ROM. In this case, from the I / 0 section to the memory ROM
Since it is faster than the above-mentioned speed of 4.8 kbps, there is no problem. When the personal computer 10 confirms that all the program data has been transmitted, it performs a so-called sum check to check the sum of the data transmitted and received between the personal computer 10 and the mobile phone, and if it is appropriate, the personal computer carries the mobile phone. A memory in the mobile phone that sends a signal to the phone and stores the program data
Writing to ROM is complete. Further, when it is not necessary to write all the data, such as when a part of the program is modified, by transmitting the address and the data, so-called patch processing for partially processing is possible. In addition, all these writing operations are not done one-to-one with one mobile phone for one personal computer, but by connecting multiple output lines from one personal computer in parallel, The program can be efficiently written in each memory of the n mobile phones in a ratio of 1 to n. On the contrary, even if the program written in the memory is erased, some data that does not mean the program (for example, all hexadecimal F
By writing all F) in the memory ROM, the written program data can be efficiently erased.

[0007]

As described above, according to the present invention, by using the interface of the mobile phone body, the program can be rewritten from the personal computer to the memory ROM in the mobile phone. It is not only necessary to take out the ROM to the outside, but not only writing and erasing the program is easy, but with it, the memory ROM can be mounted efficiently and the mobile phone can be miniaturized. The effect that can reduce is obtained. In addition, since the mobile phone has a function of switching the transmission speed of the input data from the interface and increases the transmission speed only when writing the program, the writing time can be shortened. For example, if the capacity of the memory ROM is 1 Mb and the writing speed is 4.8 kbps, the writing time can be reduced from about 42 minutes at the conventional writing speed of 600 bps to about 5 minutes.

[Brief description of drawings]

FIG. 1 is a principle diagram showing a basic configuration of a mobile phone of the present invention.

FIG. 2 is a configuration diagram of a mobile phone according to an embodiment of the present invention.

[Explanation of symbols]

1 is a circuit for switching the input data transmission speed in the I / O part of the mobile phone, 10 is a personal computer, and 20 is an external interface.

Claims (1)

[Claims] 1. In a mobile phone having a memory (ROM) for inputting and writing program data specific to the mobile phone from the outside, the transmission speed of the input data is switched to a high speed only when the program data is written. function
A mobile phone comprising (1) as an input unit (I / O unit) of the mobile phone.