NXP PCF2123 RTC Demo Kit – RTC-DEMO-PCF2123

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).

Part #: RTC-DEMO-PCF2123

Status: End of Life

  • Reference design for low power real time clock and LCD
  • Supports both PCF2123 and PCA2125 RTC ICs in 14 pin TSSOP package
  • RTC driven by 32.768kHz quartz crystal
  • SPI interface for RTC control
  • Includes 8-character alphanumeric LCD, Low Power LM75B I²C Temperature Sensor, coin cell battery holder, push-buttons, ICP programming support

>> See the brochure
Overview
Overview

The 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 FDI’s support page. 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.

It supports two different RTC options in a TSSOP-14 package:

PCF2123
PCA2125
A small USB based ICP programmer that allows ICP programming of the P89LPC932A1 and many other NXP microcontrollers from any PC is available from FDI.

Standard Specs
  • 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:
  • 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
Documentation
Current Documentation

Download all current documentation (zip)

TitleTypeFormatDate 
BrochureBrochurepdf08/13/2008
SchematicSchematicpdf02/22/2007
Software
Software

Useful Web Links

TitleTypeFormatDate 
Programming UtilitySoftwarezip09/25/2007
Windows Vista DriverDriverzip05/15/2007
Windows XP DriverDriverzip05/03/2007
Example Source CodeSource Codezip09/28/2007