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Dirve circuit of monobus

A driving circuit and single-bus technology, which is applied to the bus network, electrical components, data exchange through path configuration, etc., can solve the problems of increased program writing, complex signal control, and occupancy, achieving increased quantity, less resources, and simple connection Effect

Inactive Publication Date: 2006-04-19
张彦兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These drive circuits need to occupy multiple I / O ports of the main controller (single chip microcomputer, computer), and the signal control is more complicated, which increases the difficulty of programming, so there are certain limitations in actual use

Method used

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  • Dirve circuit of monobus
  • Dirve circuit of monobus
  • Dirve circuit of monobus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] see figure 1 , pin 2 of the driving circuit U1 is connected to pin 3 and 1-Wire bus interface A before driving; pin 18 is connected to pin 17 and 1-Wire bus interface 01 after driving, and is connected to the power line (Vcc) through R1 connection; pin 1 of the drive circuit U1 is connected to the control signal interface B; pin 19 of the drive circuit U1 is connected to the control signal interface C.

[0017] 1-Wire bus data transmission path: output: 1-Wire bus interface A before driving → pin 2 of U1 → pin 18 of U1 → 1-Wire bus interface 01 after driving; input: 1-Wire bus interface 01 after driving → Pin 17 of U1 → Pin 3 of U1 → drives front 1-Wire bus interface A. When the control signal interface B is at low level and the control signal interface C is at high level, the data on the bus is transmitted from interface A to interface 01; when the control signal interface B is at high level and the control signal interface C is at low level, The data on the bus is t...

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PUM

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Abstract

Through bus drive, í«ANDí» gate, í«NOTí» gate, the drive circuit possessing two sets (A, B) of identical functions of 4 wires drive realizes separation from monobus bus in one route to bus in multiple routes. Under control of data transmission direction control signal, the bus drive makes monobus carry out bi-directional data transmission and driven so as to raise quantity of monobus devices and distance of data transmission driven by monobus bus effectively. Advantages are: easy to connect to computer or single chip, less resources used, easy of editing control program. The invention can widely be applicable to drive 1-Wire bus device, especially, suitable to temperature measurement system with 1-Wire bus in remote multiple measuring points.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, in particular to a single bus drive circuit. Background technique [0002] The 1-Wire bus (a single bus) is a serial bus connection method introduced by the American DALLAS company. It consists of a power line (Vcc), a data line (DATA) and a ground line (GND). It uses a data The two-way transmission of data is realized by the line, which replaces the address line, data line, and control line of the traditional bus, so that the system has the advantages of simple interface, saving I / O connection, and easy expansion and maintenance. It is suitable for single-master and multi-slave devices. system, multiple 1-Wire devices can be connected to each bus. DALLAS has developed and produced several series of 1-Wire bus products including information button (iButton), memory, temperature sensor, clock circuit, analog-to-digital conversion circuit, etc., especially the digital temp...

Claims

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Application Information

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IPC IPC(8): H04L29/00H04L12/40
Inventor 张彦兵
Owner 张彦兵
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