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* The PCF2127T 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.
* This simple example code has been written for the FRDM-KL25Z + OM13513
* boards in MCUXpresso IDE v10.1.0 and demonstrates how to set and read
* the time/date on the PCF2127T 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 date/time to be set is Wednesday, January 17 2018, 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 P2-3
* INT J1-6 P2-8
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