CS42516-CQZ datasheet by Cirrus Logic

CS42516-CQZ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CS42516-CQZ?
  The recommended power-up sequence is to apply analog power (AVDD) first, followed by digital power (DVDD), and then bring the reset pin (RST) high.
• How do I configure the CS42516-CQZ for master clock mode?
  To configure the CS42516-CQZ for master clock mode, set the MCLK pin as the clock source, and ensure the MCLK frequency is between 10 MHz and 27 MHz. Also, set the MCLKDIV pin to select the desired clock frequency.
• What is the purpose of the analog and digital power-down pins (APD and DPD)?
  The APD and DPD pins allow for power-down of the analog and digital sections, respectively, to reduce power consumption when the codec is not in use.
• How do I implement a headphone detection circuit with the CS42516-CQZ?
  Connect a resistor and capacitor in series between the HP_DET pin and ground. When a headphone is inserted, the capacitor charges, and the HP_DET pin goes high, indicating headphone detection.
• What is the recommended layout and routing for the CS42516-CQZ?
  Keep analog and digital traces separate, use a solid ground plane, and avoid crossing analog and digital signals. Also, place decoupling capacitors close to the power pins and use a common ground point for analog and digital grounds.