PCF2127 and PCF2129 High-accuracy RTC module

PCF2127 and PCF2129 are +/-3ppm (typ) accuracy RTC module (including Xtal)

Hello World

Import programPCF2127_Hello

Demo code for PCF2127 (and PCF2129) library. Setting of time and displaying can be done on PC-terminal application through the USB Serial Port. PCF2127 and PCF2129 are high accuracy real-time-clock (RTC) module. This library provides simple interface to accessing clock information.

Last commit 10 Dec 2014 by InetrfaceProducts NXP

Library

Import libraryPCF2127

PCF2127 and PCF2129 are high accuracy real-time-clock (RTC) module. This library provides simple interface to accessing clock information.

Last commit 10 Dec 2014 by InetrfaceProducts NXP

Pinout

Datasheet

http://www.nxp.com/documents/data_sheet/PCF2127.pdf

Notes

PCF2127 and PCF2129

The PCF2127 and the PCF2129 are a CMOS Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption.
Both of PCF2127 and PCF2129 have a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features.
On addition to this, the PCF2127 has 512 bytes of general-purpose static RAM.

These 4 types of RTC modules are software compatible. So this library "PCF2127" can be used all of those.
This library only supports I2C to communicate with the PCF2127/PCF2129.

Type variations

Main feature difference

type+/-3ppm accuracy range512 bytes RAMpackage
PCF2127T-30℃ to +80℃yesSO16
PCF2127AT-30℃ to +60℃yesSO20
PCF2129T-30℃ to +80℃not availableSO16
PCF2129AT-15℃ to +60℃not availableSO20

Pin assign

/media/uploads/nxp_ip/pcf2127_pcf2129_pin_assign.png

PCF2127T
PCF2127T

For more information

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