PCF2129 RTC example code with use of FRDM-KL25Z and OM13513 boards

Document created by Tomas Vaverka Employee on Feb 22, 2017Last modified by Tomas Vaverka Employee on Feb 23, 2017
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* The PCF2129AT is a CMOS Real Time Clock (RTC) and calendar with an integrated
* Temperature Compensated Crystal Oscillator and a 32.768 kHz quartz crystal
* optimized for very high accuracy and very low power consumption.

*

* Detailed Description:

* This simple example code has been written for the FRDM-KL25Z + OM13513
* boards and demonstrates how to set and read the time/date on the PCF2129AT
* using the SPI (do not forget to remove the JP1 jumper) interface. It also
* illustrates how to use a minute interrupt to generate an interrupt on the
* INT pin once per minute when the Minutes register increments.
*
* In this example the time to be set is Wednesday, February 8 2017, 2:45 PM.

*

* Connection:    FRDM-KL25Z       OM13513
* VDD               J9-4                       P2-2
* GND               J9-18                    P2-1
* MOSI              J2-8                      P2-5
* MISO              J2-10                    P2-6
* SCLK              J2-12                    P2-4
* CS                  J2-6                      P2-7

* INT                 J1-6                      P2-8 
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