This is a Real Time Clock module for the PCF2129, a Real Time Clock IC by NXP. The PCF2129 has a selectable I²C-bus or SPI-bus.
It also has a backup battery switch-over circuit that lets you backup the timestamp information.
Features
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Operating voltage: 1.2V - 4.2V
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Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
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Typical accuracy:
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PCF2129AT: ±3 ppm from -15 °C to +60 °C
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Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction
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Timestamp function:
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with interrupt capability
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detection of two different events on one multilevel input pin (for example, for tamper detection)
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SPI-bus and I²C-bus interface
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Battery backup input pin and switch-over circuitry
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Programmable watchdog timer with interrupt
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Programmable alarm function with interrupt capability
Cautions
- Please prepare pin headers separately and solder them for your intended use.
Pin allocation
Surface
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