PCA8537BH/Q900/1,5 datasheet by NXP Semiconductors

PCA8537BH/Q900/1,5 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for PCA8537BH?
  The recommended operating voltage range for PCA8537BH is 1.65 V to 3.6 V, as specified in the datasheet. However, it's essential to note that the device can tolerate a voltage range of 1.5 V to 3.9 V, but with reduced performance and accuracy.
• How do I ensure the PCA8537BH is in a low-power state during sleep mode?
  To ensure the PCA8537BH is in a low-power state during sleep mode, you need to set the SLEEP bit in the Control Register (CR) to '1'. Additionally, make sure to disable the oscillator and any unnecessary peripherals to minimize power consumption.
• What is the maximum clock frequency supported by the PCA8537BH?
  The PCA8537BH supports a maximum clock frequency of 32 kHz, which is the internal oscillator frequency. However, the device can also operate with an external clock source up to 50 MHz.
• How do I configure the PCA8537BH for I2C communication?
  To configure the PCA8537BH for I2C communication, you need to set the I2CEN bit in the Control Register (CR) to '1', select the desired I2C clock frequency using the I2CSPEED bits, and configure the I2C address using the I2CADR registers.
• What is the purpose of the internal voltage regulator in the PCA8537BH?
  The internal voltage regulator in the PCA8537BH is used to regulate the internal supply voltage (VDD) to the core and peripherals. This ensures that the device operates within the specified voltage range, even when the external supply voltage (VCC) varies.