RTC-DEMO-PCF2123 Datasheet RTC-DEMO-PCF2123 | P1-P2

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

¾ PCF2123

¾ 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.

Rev 1.0 1/8/2009

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

¾ typ 100nA at 2.0V for PCF2123

¾ 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

Order Online Now at

www.digikey.com

NXP SEMI: OM6297

Warranty: 30-day money back guarantee

Availability: Stock

(256) 883-1240 Phone

(256) 883-1241 FAX

www.teamfdi.com

Contents

RTC Demo PCF2123 Board:

- PCF2123 or PCA2125 RTC

- LM75B Temp Sensor

- P89LPC932A1 8KB Flash microcontroller

- PCF8562TT 128-segment LCD Driver

- 8-character alphanumeric LCD

- 3V Coin Cell Battery

Visit www.teamFDI.com/RTCDemoPCF2123 for:

- Demo application code

- Schematic

- In Circuit Programming (ICP) Documentation

All brand names and product names are trademarks or registered trademarks of their respective holders.

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RTC-DEMO-PCF2123

Mfr. #:

Buy RTC-DEMO-PCF2123

Manufacturer:

Future Designs, Inc. (FDI)

Description:

Development Boards & Kits - 8051 NXP PCF2123 RTC Demo Kit, Rev 2

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

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Products related to this Datasheet

RTC-DEMO-PCF2123