Transcription of 1-Wire Communication with PIC Microcontroller
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1-Wire Communication with PIC Microcontroller
AN1199. 1-Wire Communication with PIC Microcontroller Author: Sashavalli Maniyar 1-Wire Protocol Microchip Technology Inc. The protocol is called 1-Wire because it uses 1 wire to transfer data. 1-Wire architecture uses a INTRODUCTION pull-up resistor to pull voltage off the data line at the master side. This application note introduces the user to the 1-Wire 1-Wire protocol uses CMOS/TTL logic and Communication protocol and describes how a 1-Wire operates at a supply voltage ranging from device can be interfaced to the PIC microcontrollers . to 6V. 1-Wire protocol is a registered trade mark of Maxim/ Master and slave can be receivers and Dallas Semiconductor. transmitters, but transfer only one direction at a A software stack for the basic, standard speed, 1-Wire time (half duplex). The master initiates and master Communication is provided with this application controls all 1-Wire operations. note along with an example application. It is a bit-oriented operation with data read and write, Least Significant bit (LSb) first, and is Note: 1-Wire is not related to the UNI/O bus.
© 2008 Microchip Technology Inc. DS01199A-page 1 AN1199 INTRODUCTION This application note introduces the user to the 1-Wire ® communication protocol and describes how a 1-Wire
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