RTC Demo Highlights Low power, SPI based Real Time Clock driven by a 32.768 KHz quartz crystal Flexible PCB layout supports two RTC package options 14-pin TSSOP for PCF2125 10-pin HVSON for PCA2124 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 is a reference design for a low power Real Time Clock and LCD solution. 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/RTCDemo. 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 PCA2125 / PCF2124 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 0.25uA at 3.0V for PCF2124 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 No other external components required Automotive temp range of -40 to +125 C for PCA2125 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-KIT Contents Suggested Resale Price: 69.00 (USD) RTC Demo Board: Order Online Now at: - PCA2125 or PCF2124 RTC www.digikey.com - P89LPC932A1 8KB Flash microcontroller www.mouser.com - PCF8562TT 128-segment LCD Driver NXP SEMI: OM6292 - 8-character alphanumeric LCD - 3V Coin Cell Battery Warranty: 30-day money back guarantee Availability: Stock Visit www.teamFDI.com/RTCDemo 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 3 8/13/2008