The NXP RTC Demo PCF2123 is a reference design for a low power Real Time Clock and LCD solution with an available I2C temperature sensor. The Demo Board is controlled by a simple two-button user interface (MODE and SELECT). Example code for several sample applications: a programmable time and date display, a programmable countdown timer, and a repeating pattern of text lines, can all be found on the Future Designs Inc. website. The user can edit this code and download it the reprogrammable Flash microcontroller via a 10-pin header included on the board using any external ICP style programmer.
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