DS1307 Real time urkreds

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Instructable om brug af DS1307 sammen med Arduino kan findes her

RTC (Real Time Clock) is very useful feature that can be applied to many of electronic products, Although we can use timer that’s built in microcontroller for timing, but microcontroller can’t operate without power supply. For this reason using timer in microcontroller for real time clock is not suitable for some application

DS1307 is Dallas Semiconductor’s serial RTC IC, that can provide full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially via a 2-wire, bi-directional bus. Clock/calendar provides second, minutes, hours, day, date month, and year information, Clock operates in either 24-hours or 12-hours format with AM/PM indicator. DS1307 has built-in power sense circuit that detects power failures and automatically switches to battery supply mode. Pin assignment of DS1307 is shown in Figure 1

DS1307 pin assignment

Figure 1 Pin assignment of DS1307

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