Audio CODEC Pins

LHPO: (134, 135) 2 Left headphone out.

RHPO: (128, 129) 2 Right headphone out.

MICIN: (144) Microphone input.

MICBIAS: (143) Microphone bias.

VREF: (140) Voltage Reference Output. An electrolytic capacitor more than 10μF in parallel with a 0.1μF ceramic capacitor attached from this pin to VSSDAC eliminates the effects of high frequency noise.

VDDRHP: (126, 127) 2 Right headphone amplifier power, 3.3V.

VSSRHP: (130, 131) 2 Right headphone amplifier ground.

VDDLHP: (136, 137) 2 Left headphone amplifier power, 3.3V.

VSSLHP: (132, 133) 2 Left headphone amplifier ground.

VDDCDAC: (139) CODEC DAC analog power, 3.3V.

VSSCDAC: (138) CODEC DAC analog ground.

VDDCADC: (141) CODEC ADC analog power, 3.3V.

VSSCADC: (142) CODEC ADC analog ground.