User manual for the I2C-bus RTC PCF85263A demo board OM13510
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© NXP B.V. 2016. All rights reserved.
1. Introduction
The PCF85263A is part of the PCF85x63 family of CMOS Real-Time Clocks (RTCs
optimized for low power consumption). Different features sets are available.
The OM13510 is the ideal evaluation and demo board to be used in the design phase of
any project; just power and I
2
C-bus must be connected.
A separate dedicated demo board and a user manual is available for the I
2
C-bus RTCs
PCF85063ATL and PCF85063TP: OM11059A and UM10698
2. Key features
2.1 Demo board OM13510
The RTC PCF85263ATL with I
2
C-bus is mounted together with a quartz crystal, a lithium
battery plus the blocking capacitor, buffering the supply voltage. A push button allows
activating the time stamp. All signals are accessible on a line of pins, overcoming the
difficulties to contact the tiny package directly.
2.2 Real time clock PCF85263A
• Very small form factor: leadless package (DFN2626-10 for PCF85263ATL) just
2.6 × 2.6 × 0.5 mm, SO8, TSSOP8 and TSSOP10 packages will be released too.
• Counting: 100
th
seconds, seconds, minutes, hours, days, week days, month and
years
• Three timestamp register sets
• Battery back-up circuit, accepting battery voltage larger or smaller than V
DD
• The oscillator is based on a 32.768 kHz quartz crystal
• Stop-watch mode for elapsed time counting. From 0 to 999’999 hours with a
resolution of 1/100 second.
• Two independent alarms
• WatchDog timer
• Two independent interrupt generators/outputs
• Generates an interrupt automatically every second or every minute, independent of
alarm facility
• Programmable offset register for frequency adjustment to compensate quartz
tolerance
