Special integrated circuit for electronic scale

Abstract

The invention discloses a special integrated circuit for an electronic scale. In the same chip, not only a reinforced type 8051 microprocessor is integrated, but also the following parts are embedded: a real-time clock circuit used for recording and printing real-time weighing time and dates, an LED / LCD drive control logic used for displaying data related to the electronic scale, a high-precision analog to digital conversion circuit used for converting an analog weight signal outputted by a strain sensor into a digital signal, a calculating engine module used for quickly realizing the 24-bit signed multiplication-division by arithmetical operation of hardware, a reinforced type peripheral control logic which comprises two UART ports supporting infrared communication and RS232 communication and is used for communication of the electronic scale, and a temperature sensor used for realizing the comprehensive real-time temperature compensation for measuring precision. The special integrated circuit has the advantages of high measuring precision, good reliability, strong anti-jamming capability, low production cost and power consumption, miniaturization and the like.

Description

technical field [0001] The invention relates to an integrated circuit, in particular to an electronic scale application-specific integrated circuit designed using SOC technology. Background technique [0002] Electronic weighing apparatus is an indispensable special measuring instrument related to the healthy development of the national economy and the normal life of the people. It has played an increasingly important role in the modern society dominated by the market economy. The application continues to deepen, and the requirements for electronic weighing products are getting higher and higher. [0003] However, the current electronic weighing instrument has a low integration level, and its secondary instrument part is usually a preamplifier, low-pass filter, analog-to-digital converter, crystal oscillator, real-time clock, memory, display drive circuit, MCU, etc. as independent components , Its shortcomings: First, the system’s anti-interference performance and reliabili...

AI Technical Summary

Problems solved by technology

[0003] However, the current electronic weighing instrument has a low integration level, and its secondary instrument part is usually a preamplifier, low-pass filter, analog-to-digital converter, crystal oscillator, real-time clock, memory, display drive circuit, MCU, etc. as independent components , Its shortcomings: First, the system’s anti-interference performance and reliability are poor; second, the weighing and measurement accuracy is greatly affected by the ambient temperature; third, the printed circuit board occupies a large area, has many solder joints, and high production costs; Due to the large number of components, the power consumption is relatively large

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