Difference between revisions of "A6.8051 Interfacing: RTC DS1307"

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The RTC DS1307 is a handy solution to keep time all the way, when it is powered by a coin cell.
 
The RTC DS1307 is a handy solution to keep time all the way, when it is powered by a coin cell.
  
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It is uses '''I²C''' ('''Inter-Integrated Circuit''') protocol, referred to as ''I-squared-C'', ''I-two-C'', or ''IIC'') for communication with the micrcontroller.Let see first the basics of the communication protocol first.
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It is uses '''I²C''' ('''Inter-Integrated Circuit''') protocol, referred to as ''I-squared-C'', ''I-two-C'', or ''IIC'') for communication with the micrcontroller.[[Serial_protocol_I2C|Check the basics of I2C]] here, if are not familiar with it.
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[[Image:I2C.png|thumb|350px|A sample schematic with one master and three slaves]]
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=Schematic=
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The '''I²C'''  require only two wires for communication. One is called the '''Serial Data (SDA)''' and the other is '''Serial Clock (SCL)''' as shown.
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There are various modes and configurations in which it can be used. Let us start simply with a single master and a single slave.
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The Master generates the clock for serial communicaton
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Revision as of 15:02, 26 January 2014

Basics

The Real time clock DS1307 IC basically is stand alone time clock. Well, basically we can use a micrcontroller to keep time, but the value would go off as soon as it is powered off.

The RTC DS1307 is a handy solution to keep time all the way, when it is powered by a coin cell.

It is uses I²C (Inter-Integrated Circuit) protocol, referred to as I-squared-C, I-two-C, or IIC) for communication with the micrcontroller.Check the basics of I2C here, if are not familiar with it.

Schematic

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