JPH06233023A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To easily exchange a program in a ROM by providing a means which deletes the program stored in the ROM, and a means which writes the new received program in the ROM. CONSTITUTION:This device is equipped with a ROM 110 in which the control program of a CPU 101 is stored, and the program can be electrically deleted. When a ROM rewriting mode is obtained by depressing the mode selection switch of a control part 106, only the program for controlling a prescribed operation in the ROM 110 is written in a RAM 107, and afterwards the program is read from the RAM 107, and executed. Next, the new program is received through a communication control part 109, and stored in a picture memory 108. Then, the new program is turned in a state that the program can be written according to the specification of the ROM 110, and the program stored in the picture memory 108 is written in the ROM 110. At last, a normal mode is obtained by operating reset, and this device is operated by the new program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ROM capable of electrically erasing a program such as an EEPROM or a flash memory.
The present invention relates to a facsimile machine having

[0002]

2. Description of the Related Art As a type of ROM used in a conventional facsimile apparatus, there are a type that erases a program with ultraviolet rays, a so-called one-time type that cannot erase a program, and the like. It is also possible to use a ROM that can electrically erase the program.

[0003]

However, in the above-mentioned conventional example, since the contents of the ROM cannot be changed without disassembling the device, it is necessary to replace the ROM when there is a problem in the program or when the function is improved. When
A service person went to the user, disassembled the facsimile machine, removed the ROM mounted on the board inside, and required a troublesome work of mounting a new ROM.

It is an object of the present invention to provide a facsimile machine which can easily exchange programs in ROM.

[0005]

SUMMARY OF THE INVENTION The present invention provides a means for erasing the contents of an electrically erasable ROM of a program, and a means for writing a new received program in the ROM, so that the contents of the ROM can be connected to a circuit. It can be changed via.

[0006]

1 is a block diagram of a facsimile apparatus according to a first embodiment of the present invention.

This facsimile apparatus has a CPU 101 for controlling the entire apparatus, a scanner 102 for reading a document to obtain image data, a printer 103 for printing out an image on a recording sheet, and a display section for displaying various information. 104 and a conversion unit 105 for compressing and decompressing image data
And an operation unit 106 for performing various key inputs and the like, C
A RAM 107 used as a work area or the like for executing a program of the PU 101, an image memory 108 for accumulating image data, a communication control unit 109 for controlling connection of a communication line, and a control program of the CPU 101 are stored. ROM 110 capable of electrically erasing programs
And have.

FIG. 2 is a flow chart showing the operation of this embodiment.

First, the apparatus is set to "ROM rewriting mode" (S201). This is a ROM rewriting mode by pressing the mode selection switch of the operation unit 106
Only the program that controls the following operations in 110 is RA
The program is written to M107, and thereafter, the program is read from the RAM 107 and executed. Further, in this embodiment, the operation unit 106 is used to select the mode, but a dip switch or the like may be used.

Next, a new program is transmitted to the line by the ROM transmitter or the like, and the facsimile machine receives the program via the communication control unit 109 and stores it in the image memory 108 (S202). This is the same operation as receiving a normal image. Further, as the form of data to be transmitted through the line, when unencoded raw data is used, it is directly stored in the image memory 108, and when encoded data such as MH and MR is used, the conversion unit 105 expands the raw data. Then, it is stored in the image memory.

Then, the new program stored in the image memory 108 is written in the ROM 110 (S203). This sets the ROM 110 to a writable state in accordance with the specifications of the ROM 110 (erases programs that need to be erased beforehand) and writes the new program accumulated in the image memory 108 to the ROM 110.

When the writing is completed, a reset is finally applied to the "normal mode" to operate the device with a new program (S204).

Next, a second embodiment of the present invention will be described. FIG. 3 is a flow chart showing the operation of the second embodiment. The overall structure of the facsimile machine is
Description will be made assuming that it is common to the first embodiment (FIG. 1).

First, the apparatus is set to "ROM rewriting mode" (S301). By pressing a mode selection switch (not shown) of the operation unit 106, a ROM rewriting mode is set, and only a program in the ROM 110 for controlling the following operations is written in the RAM 107 and the program is executed from the RAM 107. Although the operation unit 106 is used for mode selection in this example, a dip switch or the like may be used.

In the "normal mode", the received data is stored in the image memory 108. In this mode, the hardware operates the address so that it is stored in the ROM 110. The details will be described below.

First, assuming that the memory map in the normal mode of the apparatus is 0H to 3FFFFH address ROM 40000H to 7FFFFH address RAM 80000H to FFFFFH address image memory as shown in FIG. The configuration is as shown in FIG.

In FIG. 4, the CPU 401 is the C of FIG.
It is the same as the PU 101, and the RAM 402 is R
The AM 107, the ROM 403 are the same as the ROM 110, and the image memory 404 is the same as the image memory 108. Therefore, the ROM 403 can electrically erase the program.

Further, this circuit has 3-input ORs 405, 4
06, 2-input OR 407, inverters 408, 40
9 and a selector 410. This selector 410
If the S terminal is 0, the output Y is A, and if the S terminal is 1, B
Is output. Therefore, in the "normal mode", the selector 4
Since the S terminal of 10 is 0, A is selected as the output and the ROM
403 chip select signal (hereinafter referred to as CS signal)
Is the output of the 3-input OR 406, and the CS signal of the image memory is the output of the 2-input OR 407, as shown in the memory map of FIG.

On the other hand, in the "ROM rewriting mode", the S terminal of the selector 410 is 1, the ROM CS signal is the output of the 2-input OR 407, and the CS signal of the image memory is the 3-input O.
It becomes the output of R406, and becomes like the memory map shown in FIG.

The RAM area where the "ROM rewrite mode" control program is stored does not change in either mode. Then, according to the specifications of the ROM 406, the ROM 40
6 is ready for writing. It should be noted that the programs that need to be erased beforehand are erased.

Returning to FIG. 3, the process proceeds to the next step, and a new program is transmitted to the line by a ROM transmitter or the like, and the device receives the program via the communication control unit 109, and the ROM 11
It is stored in 0 (S302). This is the same operation as receiving a normal image. When raw data is used as a form of data transmitted on the line, the ROM 110 is directly used.
When the encoded data such as MH and MR is used, the conversion unit 105 decompresses it into raw data and then stores it in the ROM 110.

Finally, the S terminal of the selector 410 shown in FIG. 4 is set to 0 to make a normal memory map and reset,
The device is set to "normal mode" and operated by a new program (S303).

[0023]

As described above, according to the present invention,
The contents of the ROM can be changed via the line, and when there is a problem in the program or when the contents of the ROM are changed due to functional upgrades, etc., it is not necessary to disassemble the device to take out the ROM, and it is easy to do. There is an effect that can be. Further, there is an effect that the contents of the ROM can be changed from a remote place.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment.

FIG. 3 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 4 is a circuit diagram showing an address control circuit of the second embodiment.

FIG. 5 is a schematic diagram showing a memory map in a normal mode of the second embodiment.

FIG. 6 is a schematic diagram showing a memory map in a ROM rewriting mode of the second embodiment.

[Explanation of symbols]

 101 ... CPU, 102 ... Scanner, 103 ... Printer, 104 ... Display unit, 105 ... Conversion unit, 106 ... Operation unit, 107 ... RAM, 108 ... Image memory, 109 ... Communication control unit, 110 ... ROM.

Claims (1)

[Claims] 1. A facsimile apparatus having an electrically erasable ROM for a program, means for erasing a program stored in said ROM;
A facsimile apparatus comprising: means for writing a program received from the outside into the ROM.