PCF2111CT/1,112 datasheet by NXP Semiconductors

PCF2111CT/1,112 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCF2111CT/1,112?
  The recommended operating voltage range for PCF2111CT/1,112 is 1.8V to 5.5V.
• How do I ensure the PCF2111CT/1,112 oscillator starts reliably?
  To ensure the oscillator starts reliably, make sure to connect a 1-10 kΩ resistor between the XTAL1 and XTAL2 pins, and a 10-22 pF capacitor between XTAL1 and GND, and XTAL2 and GND.
• What is the maximum clock frequency supported by PCF2111CT/1,112?
  The PCF2111CT/1,112 supports a maximum clock frequency of 32 kHz.
• How do I configure the PCF2111CT/1,112 for low-power operation?
  To configure the PCF2111CT/1,112 for low-power operation, set the clock mode to 'Low Power' (LP) mode by setting the CLKMD bit in the Control Register (CTR) to '1'.
• What is the purpose of the RST pin on the PCF2111CT/1,112?
  The RST pin is an active-low reset input that resets the device when pulled low. It can be used to reset the device during power-up or in case of a fault condition.