PCF8584T/2,518 datasheet by NXP Semiconductors

PCF8584T/2,518 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the PCF8584T/2,518 can handle?
  The PCF8584T/2,518 can handle clock frequencies up to 2.5 MHz.
• How do I ensure that the PCF8584T/2,518 is properly reset after power-on?
  To ensure proper reset, apply a power-on reset pulse to the RST pin, and hold it low for at least 1 ms. This will reset the device and ensure that it starts in a known state.
• What is the purpose of the X1 and X2 pins on the PCF8584T/2,518?
  The X1 and X2 pins are used as external clock input pins. They can be connected to a crystal oscillator or an external clock source to provide a clock signal to the device.
• How do I configure the PCF8584T/2,518 to generate a 1 Hz clock signal?
  To generate a 1 Hz clock signal, set the clock divider to 4096 and use the internal oscillator. This will divide the internal oscillator frequency by 4096, resulting in a 1 Hz clock signal.
• What is the maximum capacitance that can be connected to the X1 and X2 pins?
  The maximum capacitance that can be connected to the X1 and X2 pins is 20 pF. Exceeding this value may affect the oscillator's stability and frequency.