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Single chip microcomputer and communication circuit with DALLAS single-wire bus protocol

A technology of communication circuits and single-chip microcomputers, applied in electrical components, data processing power supplies, electrical digital data processing, etc., can solve the problems of increasing system energy consumption and consuming system power, and achieve the effect of reducing energy consumption

Inactive Publication Date: 2011-03-30
卢文婧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of connection relationship makes the pull-up resistor R still consume the power of the system when the single-chip microcomputer U1 and the fuel gauge chip U2 are not working, which undoubtedly increases the energy consumption of the system

Method used

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  • Single chip microcomputer and communication circuit with DALLAS single-wire bus protocol
  • Single chip microcomputer and communication circuit with DALLAS single-wire bus protocol
  • Single chip microcomputer and communication circuit with DALLAS single-wire bus protocol

Examples

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Embodiment Construction

[0013] Such as figure 2 As shown, the communication structure of single-chip microcomputer and DALLAS single-bus protocol includes single-chip microcomputer U1, fuel gauge chip U2, pin 25 of single-chip microcomputer U1 is connected with pin 5 of fuel gauge chip U2, pin 25 of single-chip microcomputer U1 is connected with fuel gauge chip U2 The connection point between the pins 5 of 1 is connected to one end of the pull-up resistor R, and the other end of the pull-up resistor R is connected to the pin 23 of the single-chip microcomputer U1.

[0014] The model of the single-chip microcomputer U1 is ATMEGA48; the model of the fuel gauge chip U2 is DS2781.

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Abstract

A single chip microcomputer (SCM) and a communication circuit with DALLAS single-wire bus protocol belong to communication structures and particularly relate to a SCM and a communication structure with the DALLAS single-wire bus protocol which are adopted to realize low-power communication between the SCM and the DALLAS single-wire bus protocol and mainly used to perform DALLAS single-wire bus protocol communication between the special coulometer chip DS2781 of the MAXIM company and the ATMEGA48 microcontroller of the ATMEL company. The invention provides the SCM and communication structure with the DALLAS single-wire bus protocol, for reducing the energy consumption of the system. The communication circuit contains the SCM and a coulometer chip, wherein the pin 25 of the SCM is connected with the pin 5 of the coulometer chip, the connection point of the pin 25 and the pin 5 is connected with one end of a pull-up resistor, and the other end of the pull-up resistor is connected with the pin 23 of the SCM.

Description

Technical field: [0001] The present invention belongs to the communication structure, especially relates to a kind of single-chip microcomputer and DALLAS single-bus agreement communication structure that can realize single-chip microcomputer and DALLAS single-bus agreement to carry out low-power consumption communication, mainly used in MAXIM company's special fuel gauge chip DS2781 and ATMEL company's ATMEGA48 DALLAS single-bus protocol communication between microcontrollers. Background technique: [0002] With the continuous improvement of people's living standards and the continuous progress of society, people's requirements for electronic equipment are also getting higher and higher, and electronic equipment is developing in the direction of miniaturization and intelligence. Especially for electronic devices such as laptops, there is an important component - the calculation part of battery power. If the calculation accuracy of the calculation part of battery power is no...

Claims

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Application Information

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IPC IPC(8): H04L29/06G06F13/38G06F1/32
CPCY02B60/1235Y02B60/1228Y02D10/00
Inventor 卢文婧
Owner 卢文婧