JPH08116498A - Detecting device for write of erroneous into nonvolatile memory and television receiver provided with the device - Google Patents

Abstract

PURPOSE: To allow a microcomputer to detect unprepared rewrite of data in a nonvolatile memory into erroneous data. CONSTITUTION: A data group required for video image control and comparison basic data resulting from all calculations such as XOR from the data group are stored in a nonvolatile memory 1, a memory data calculation means 2 sends calculation data values such as XOR of the data group in the nonvolatile memory 1 to a comparator means 3, which compares the received data with the comparison basic data written in the nonvolatile memory 1. When the two data are the same, no processing is made but when the two data differ from each other, a memory data error display device 4 displays it that the data in the nonvolatile memory 1 are unpreparedly rewritten.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous data write detection device for a non-volatile memory used in a television receiver and the like, and a television receiver provided with the same.

[0002]

2. Description of the Related Art In recent years, a television receiver utilizing a non-volatile memory has been developed, and a value (data) necessary for controlling the television receiver is stored in the non-volatile memory, and based on the stored value, A function to control the image of the television receiver has been added.

FIG. 3 is a block diagram showing a conventional method of examining data in a nonvolatile memory. In FIG. 3, 5 is a non-volatile memory, 6 is a bus monitor device, and 7 is an IIC line.

The operation of the method for investigating the data in the nonvolatile memory configured as described above will be described below.

The non-volatile memory 5 stores various data necessary for controlling the image of the television receiver, etc., and can be controlled by the IIC line 7. The bus monitor device 6 is a device that uses the IIC line 7 to investigate the data in the nonvolatile memory and display the contents thereof. In the television receiver or the like having the above configuration, when an image or the like becomes abnormal, it is confirmed whether or not the data in the nonvolatile memory is different from the previously set data.

[0006]

However, since the conventional television receiver stores a large amount of data in the non-volatile memory, the data in the memory may be inadvertently rewritten due to noise or the like. As a result, even if the image etc.
It is difficult to infer that the cause is a non-volatile memory. Further, even if the cause is found to be a non-volatile memory, it is difficult to investigate under what state the content of the non-volatile memory is rewritten by the above method of examining data in the non-volatile memory.

In view of the above problems, the present invention makes it possible not only to detect that data in a non-volatile memory is inadvertently rewritten, but also to display when data is inadvertently rewritten. The present invention also provides a device for detecting erroneous data writing to a nonvolatile memory.

Further, the apparatus is provided with an erroneous data write detection device for the non-volatile memory, and has a function of displaying that an abnormality has occurred on the screen of the CRT (cathode ray tube) when the data of the non-volatile memory is rewritten. It is intended to provide a television receiver.

[0009]

In order to solve the above-mentioned problems, an erroneous data write detection device for a nonvolatile memory of the present invention does not use a conventional bus monitor device, but an error is detected in the nonvolatile memory in a microcomputer. It detects the writing of data, and uses a non-volatile memory, a memory data calculation device,
It is composed of a memory data comparison device and a memory data abnormality display device.

Further, the television receiver of the present invention comprises a non-volatile memory erroneous data write detection device of the present invention, an abnormal state discriminating section for discriminating an abnormal state of data in the non-volatile memory, and an abnormal state discriminating section. It is composed of an R, G, B (red, green, blue) character display drive circuit that outputs a color signal based on information, and a CRT.

[0011]

According to the present invention, when the data stored in the non-volatile memory is inadvertently rewritten by the above configuration,
It is possible to detect and display an abnormal state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A non-volatile memory erroneous data write detection device according to an embodiment of the present invention and a television receiver having the same will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of an erroneous data writing device for a nonvolatile memory according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a non-volatile memory in which data necessary for controlling an image of a television receiver is written, and 2 is a memory data calculation means for performing calculation using the data stored in the non-volatile memory 1. Reference numeral 3 is a memory data comparison means for comparing the value obtained by the memory data calculation means 2 with the comparison basic data written in the non-volatile memory 1, and 4 is an error as a result of the comparison performed by the memory data comparison means 3. It is a display unit for displaying a memory data abnormality, if any.

The operation will be described below. In the non-volatile memory 1, XOR (exclusive OR, addition, subtraction, etc.) may be calculated for many data groups necessary for controlling the television receiver and all initial setting values of the data groups. The comparison basic data of the result is stored. The memory data calculation means 2 calculates XOR (or addition, subtraction, etc. may be performed) for all the data groups of the non-volatile memory 1 at regular time intervals, obtains calculation data, and causes the memory data comparison means 3 to perform the calculation. Send the calculated data. Upon receiving the calculation data obtained by the memory data calculating unit 2, the memory data comparing unit 3 compares the calculation data with the comparison basic data stored in the nonvolatile memory 1. As a result of the comparison, if the two values are the same, nothing is done thereafter. When the two values are different from each other, it is determined that the memory data is abnormal, that is, the value of the non-volatile memory is inadvertently rewritten. When it is determined that the memory data is abnormal, the memory data abnormal display unit 4 displays that the value of the non-volatile memory is inadvertently rewritten by using an arbitrary unit such as a lamp.

As described above, the memory data calculation means,
With the configuration including the memory data comparison unit and the memory data abnormality display unit, it is possible to detect that the erroneous data is written in the nonvolatile memory without using the bus monitor device.

(Embodiment 2) FIG. 2 is a block diagram showing the configuration of a television receiver according to an embodiment of the present invention, which comprises the erroneous data write detection device for the nonvolatile memory described in Embodiment 1. In FIG. 2, 8 is an ANT (antenna), 9 is a tuner section, 10 is a video intermediate frequency amplification circuit, 11 is a video detection circuit, and 1 is a video detection circuit.
Reference numeral 2 is a video amplifier circuit. Reference numeral 14 is an RGB character display drive circuit that outputs a color signal based on the information from the memory data comparison means 20. Reference numeral 15 is a switch control means for switching a video signal from the video amplifier circuit and a color signal from the RGB character display drive circuit 14. Reference numeral 13 is a signal changeover switch. The signal switched by the signal selector switch 13 passes through the video CRT drive circuit 16,
The image is output from the CRT 17. Reference numeral 20 is a memory data comparison means.

The operation of the television receiver configured as above will be described. First, the television signal input from the ANT 8 is processed in the order of the tuner unit 9, the video intermediate frequency amplification circuit 10, the video detection circuit 11, and the video amplification circuit 12. Normally, the signal changeover switch 13 is tilted toward the video amplifier circuit 12 side, and the video CRT drive circuit 16
Then, the image is output to the CRT 17 and is displayed. When the memory data comparison means 20 determines that the memory data is abnormal, the RGB character display drive circuit 14 is operated. When the memory data comparison means 20 transmits the result of the memory data abnormality to the switch changeover means 15, the switch changeover means 15 changes over the signal changeover switch 13 to the RGB character constant drive circuit 14 side, and the color signal is a video CRT drive circuit. It is output to the CRT 17 through 16 and it is displayed that the data in the non-volatile memory is abnormal.

[0018]

As described above, according to the present invention, by detecting the writing of erroneous data in the non-volatile memory by the microcomputer, it becomes easy to pursue the cause even when a trouble occurs in a process or the like.

Further, when the television receiver of the present invention is equipped with the erroneous data write detection device for the non-volatile memory of the present invention, it can easily indicate that the data in the non-volatile memory is abnormal, and The practical effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram of an erroneous data write detection device for a nonvolatile memory according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a television receiver according to an embodiment of the present invention.

FIG. 3 is a block configuration diagram of a conventional nonvolatile memory data inspection method.

[Explanation of symbols]

 1 Non-volatile memory 2 Memory data calculation means 3, 20 Memory data comparison means 4 Memory data abnormal display device 8 Antenna 9 Tuner section 10 Video intermediate frequency amplification circuit 11 Video detection circuit 12 Video amplification circuit 13 Signal changeover switch 14 RGB characters Display drive circuit 15 Switch switching means 16 Video CRT drive circuit 17 CRT

Claims (2)

[Claims] 1. A non-volatile memory in which control data for a television receiver is written, a memory data calculation means for performing calculation using the data in the non-volatile memory, and a value and non-volatile value obtained by the memory data calculation means. Non-volatile, comprising: a memory data comparing means for comparing the data stored in the volatile memory with the memory data; and a memory data abnormal time displaying means for displaying that the memory data has an abnormal value. Device for detecting erroneous data writing to the volatile memory. 2. A device for detecting erroneous data writing to a non-volatile memory according to claim 1, an abnormal state discriminating section for discriminating an abnormal state of data in the non-volatile memory, and information based on the information from the abnormal state discriminating section. , RG that outputs color signals
A television receiver comprising a display drive circuit for B (red, green, blue) characters and a CRT.