JPH04104369U - micro computer - Google Patents

Abstract

(57) [Summary] [Structure] A/D converted data is sequentially stored in one A/D conversion data register 6 and also stored in the previous A/D conversion data register 7. Every time A/D conversion is performed, the difference between A/D conversion data registers 6 and 7 is calculated, and the A/D conversion data registers 6 and 7 are calculated.
A comparison is made with the contents of the D conversion reference change amount register 8. Depending on the comparison result, an interrupt signal 11 is output. [Effect] It is possible to obtain a microcomputer that can omit software processing, quickly respond to rapid changes in input voltage, and enable fine control.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a microcomputer with a built-in A/D conversion circuit. .

0002

[Conventional technology]

Microcomputers with built-in A/D conversion circuits are used, for example, in air conditioners and fan heaters. It is used to measure room temperature and control output, such as in like that If so, it is up to the software to detect the room temperature and set the output state accordingly. It was done by processing. In other words, conventionally, interrupts due to A/D conversion are This was done through software processing based on the converted data.

0003

[Problem that the idea aims to solve]

As mentioned above, conventionally, interrupts due to A/D conversion are This was done by software processing based on the results of the data, but for example, if the window was closed midway through, It was difficult to respond to sudden changes in room temperature when the room was opened.

0004 The present invention provides a microcomputer that solves the above problems. Ru.

[0005]

[Means to solve the problem]

The microcomputer of this invention is a microcomputer with a built-in A/D conversion circuit. How to calculate the amount of change in A/D converted data per unit time in a computer a means for comparing the amount of change calculated by said means with a reference amount of change; and said means. and means for outputting an interrupt signal according to the comparison result by the stage. It is a sign.

[0006]

[Effect] The amount of change calculation means calculates the amount of change per unit time of the A/D converted data. Desired. A comparison means compares this amount of change with a reference amount of change.

[0007] Depending on the comparison result, an interrupt signal is automatically output.

[0008]

【Example】

Hereinafter, the present invention will be described in detail based on examples.

[0009] FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

0010 In the figure, 1 is the input analog signal, 2 is the A/D converter, and 3 is the D/A converter. 4 is a comparator, 5 is a control unit, and 6 is a first unit that stores A/D conversion data. A/D conversion data register, 7 is the second A/D that stores the previous A/D conversion data. Conversion data register 8 is calculated from the contents of the above two A/D conversion data registers. A/D conversion reference change amount to be compared with the A/D conversion data change amount. D conversion reference change amount register, 9 is data bus, 10 is timer, 11 is interrupt It's a signal.

[0011] The A/D converted data is sequentially stored in the 1A/D conversion data register 6. In addition, the previous A/D converted data is stored in the second A/D converted data register 7. Ru. Every time A/D conversion is performed, the difference between A/D conversion data registers 6 and 7 is calculated, and A/D conversion is performed. A comparison is made with the contents of the /D conversion reference change amount register 8. Depending on the comparison results, The input signal 11 is output.

0012

[Effect of the idea]

As explained in detail above, according to the present invention, the unit time of A/D converted data is Calculate the amount of change between By automatically outputting interrupt signals, software processing can be omitted, A microphone that can quickly respond to sudden changes in input voltage and enables fine-grained control. It is possible to obtain a black computer. This invention is suitable for air conditioners and fans. Detects sudden changes in A/D conversion data such as heater temperature detection, and performs control and safety functions. Effective for making all devices work.

[Brief explanation of drawings]

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

[Explanation of symbols] 1 Analog signal 2 A/D converter 3 D/A converter 4 Comparator 5 Control section 6 1st A/D conversion data register 7 2nd A/D conversion data register 8 A/D conversion reference change amount register 9 Data bus 10 Timer 11 Interrupt signal

Claims (1)

[Scope of utility model registration request] Claim 1: In a microcomputer with a built-in A/D conversion circuit, means for calculating the amount of change per unit time of A/D converted data, and the amount of change calculated by the means and the reference amount of change. 1. A microcomputer comprising: means for performing a comparison with the results of the comparison, and means for outputting an interrupt signal in accordance with the comparison result by the means.