The recommended power-up sequence is to apply power to the VDDIO and VDDCORE pins simultaneously, followed by the VDDA pin. This ensures proper initialization and prevents damage to the device.
To configure the EP9315-CB for audio playback, set the AUDMODE pin to '1' and configure the I2S interface using the I2C interface. Additionally, ensure that the correct clock frequency is selected using the MCLK pin.
The EP9315-CB supports clock frequencies up to 50 MHz on the MCLK pin. However, the recommended clock frequency is 12.288 MHz for most audio applications.
Yes, the EP9315-CB is compatible with 3.3V power supplies. However, ensure that the VDDIO and VDDCORE pins are powered from a 1.8V or 2.5V supply, and the VDDA pin is powered from a 3.3V supply.
To troubleshoot audio issues, check the I2S clock and data signals using an oscilloscope or logic analyzer. Ensure that the audio data is being transmitted correctly and that the clock frequency is stable. Also, verify that the AUDMODE pin is set correctly and that the I2C interface is configured properly.
EP9315-CB datasheet
by Cirrus Logic
