PCF8523TK/1,118 datasheet by NXP Semiconductors

PCF8523TK/1,118 Frequently Asked Questions (FAQs)

• What is the recommended crystal oscillator frequency for PCF8523TK/1,118?
  The recommended crystal oscillator frequency for PCF8523TK/1,118 is 32.768 kHz.
• How do I configure the PCF8523TK/1,118 for battery-backed mode?
  To configure the PCF8523TK/1,118 for battery-backed mode, connect the VBAT pin to a battery, and ensure that the VCC pin is connected to a power source. The device will automatically switch to battery-backed mode when the VCC pin is powered down.
• What is the maximum operating temperature range for PCF8523TK/1,118?
  The maximum operating temperature range for PCF8523TK/1,118 is -40°C to +85°C.
• How do I reset the PCF8523TK/1,118?
  The PCF8523TK/1,118 can be reset by pulling the RST pin low for at least 1 ms. This will reset the device and clear all registers.
• What is the purpose of the CLKOUT pin on PCF8523TK/1,118?
  The CLKOUT pin on PCF8523TK/1,118 provides a 32.768 kHz clock output that can be used to drive other devices or circuits.