PCF8563T/5 datasheet by NXP Semiconductors

PCF8563T/5 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the PCF8563T/5 can handle?
  The PCF8563T/5 can handle a maximum clock frequency of 32.768 kHz, which is the typical frequency for a quartz crystal oscillator.
• How do I configure the PCF8563T/5 to generate an interrupt on a specific event?
  To configure the PCF8563T/5 to generate an interrupt on a specific event, you need to set the corresponding interrupt enable bit in the Interrupt Enable Register (IER) and configure the event trigger in the Event Control Register (ECR).
• What is the purpose of the VBAT pin on the PCF8563T/5?
  The VBAT pin is used to connect a battery or a supercapacitor to the PCF8563T/5, which allows the device to maintain its internal clock and calendar information during power failures or when the main power supply is turned off.
• How do I reset the PCF8563T/5 to its default state?
  To reset the PCF8563T/5 to its default state, you need to assert the RESET pin low for at least 1 ms. This will reset all registers to their default values and clear any pending interrupts.
• What is the accuracy of the internal oscillator on the PCF8563T/5?
  The internal oscillator on the PCF8563T/5 has an accuracy of ±10% over the entire operating temperature range of -40°C to 85°C.