PCF8536BT/1,118 datasheet by NXP Semiconductors

PCF8536BT/1,118 Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the PCF8536BT/1,118?
  The recommended power-on sequence is to apply VDD first, followed by VBAT. This ensures that the internal voltage regulator is enabled before the battery voltage is applied.
• How do I configure the PCF8536BT/1,118 for I2C communication?
  The PCF8536BT/1,118 is configured for I2C communication by default. However, the SCL and SDA pins must be connected to the I2C bus, and the device address must be set using the A0, A1, and A2 pins.
• What is the maximum clock frequency for the I2C interface?
  The maximum clock frequency for the I2C interface is 400 kHz.
• How do I reset the PCF8536BT/1,118?
  The PCF8536BT/1,118 can be reset by applying a low signal to the RST pin or by performing a software reset using the I2C interface.
• What is the purpose of the VBAT pin?
  The VBAT pin is used to connect a battery or a supercapacitor to store data in the device's RAM during power-down or battery replacement.