RTC Demo PCF2123 Highlights Low power, SPI based Real Time Clock driven by a 32.768 KHz quartz crystal Supports Two Different RTC Options in a TSSOP-14 Package PCF2123 PCA2125 Available Low Power LM75B I2C Temperature Sensor Powered by a single 3V coin cell battery 8-character alphanumeric LCD I2C based LCD driver with 128 segment support Two miniature push-buttons for user control additional User Interface via header User reprogrammable via 10-pin ICP header 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 website at www.teamFDI.com/RTCDemoPCF2123. The user can edit this code and download to the reprogrammable Flash microcontroller via a 10-pin header included on the board using any external ICP style programmer. A small USB based ICP programmer that allows ICP programming of the P89LPC932A1 and many other NXP microcontrollers from any PC is available from Future Designs, Inc. Details can be found at www.teamfdi.com/USB-ICP. Features PCF2123 / PCA2125 Low Power SPI based RTC Resolution - sec, minutes, hours, weekday, day, month, year Operating voltage 1.2 to 5.5V Low standby current for SuperCap typ 100nA at 2.0V for PCF2123 typ 0.55uA at 3.0V for PCA2125 Three-line SPI with separate data I/O Programmable timer / alarm functions with interrupt capability Internal power-on reset 32.768 KHz quartz crystal LM75B Low Power Temp Sensor Temperature resolution of 0.125 C Pin-for-Pin Replacement for LM75 and LM75A standards Temperatures range from -55 C to +125 C P89LPC932A1 8-bit, 2-clock, 80C51 MCU 8 KB Flash, 256 bytes RAM 28-pin PLCC package with Internal RC Oscillator UART, ADC, DAC, two 16-bit timers & RTC, KBI WDT with on chip 400kHz oscillator Ordering Information Part Number: RTC-DEMO-PCF2123 Contents Price: 69.00 (USD) RTC Demo PCF2123 Board: Order Online Now at - PCF2123 or PCA2125 RTC www.mouser.com - LM75B Temp Sensor - P89LPC932A1 8KB Flash microcontroller NXP SEMI: OM6297 - PCF8562TT 128-segment LCD Driver - 8-character alphanumeric LCD Warranty: 30-day money back guarantee - 3V Coin Cell Battery Availability: Stock Visit www.teamFDI.com/RTCDemoPCF2123 for: (256) 883-1240 Phone - Demo application code (256) 883-1241 FAX - Schematic E-mail: sales teamfdi.com - In Circuit Programming (ICP) Documentation www.teamfdi.com All brand names and product names are trademarks or registered trademarks of their respective holders. Rev 1.0 1/8/2009