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SiT8021 Evaluation Boards
SparkFun Electronics
SparkFun Electronics
DS3234 RTC Breakout Board
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SparkFun Real Time Clock Module

SparkFun Electronics

This is the SparkFun Real Time Clock (RTC) Module, this little breakout that uses the DS1307 to keep track of the current year, month, day as well as the current time. The module comes fully assembled and pre-programmed with the current time (MST) and includes a small CR1225 Lithium coin cell battery that will run the RTC for a minimum of 9 years (17 years typical) without an external 5V power supply. The DS1307 RTC is accessed via the I²C protocol. A written test-bed to program the modules, this code should give you some insight on how to interface the module to any microcontroller using the example software I²C and BCD routines. This rev of the Real Time Clock module finally adds I²C resistors and a larger battery pad to fix the problems with the battery shorting to the board.

  • Two wire I²C interface
  • Hour : Minutes : Seconds AM/PM
  • Day Month, Date - Year
  • Leap year compensation
  • Accurate calendar up to year 2100
  • Battery backup included
  • 1Hz output pin
  • 56 Bytes of Non-volatile memory available to user
  • 0 x 68 I²C Address
  • Embedded:No
  • Function:Real Time Clock (RTC)
  • Secondary Attributes:I²C Interface
  • Supplied Contents:Board(s)
  • Type:Timing
  • Utilized IC / Part:DS1307
Associated Product
Maxim Integrated Serial Address
Category: Semiconductors, Development Tools-Integrated Circuits (ICs)-Clock, Timing-Real Time Clocks (RTC)-Serial Address