Analog Devices ADV7850 Hardware Manual page 343

Function
right_adc_1_pu
0 
1
hp_left_amp_pu, Addr 5C (audio_codec), Address 0x05[4]
This control is used to power up the headphone left amplifier.
Function
hp_left_amp_pu
0 
1
hp_right_amp_pu, Addr 5C (audio_codec), Address 0x05[5]
This control is used to power up the headphone right amplifier.
Function
hp_right_amp_pu
0 
1
vref_enb, Addr 5C (audio_codec), Address 0x08[0]
This control is used to disable the voltage reference.
Function
vref_enb
0 
1
ref_core_pd, Addr 5C (audio_codec), Address 0x33[6]
This control is used to power down the reference core.
Function
ref_core_pd
0 
1
To place the Audio Codec into a powered down state, the I2C writes listed below should be used. If the audio codec is not being used, the
below writes should also be carried out to ensure low power consumption.
5C 33 40 Power down reference
5C 08 01 Voltage reference disable
5C 01 11 Amplifier power down
Rev. A May 2012
Description
Power down ADC right channel
Power up ADC right channel
Description
Power down headphone left amplifier
Power up headphone left amplifier
Description
Power down headphone right amplifier
Power up headphone right amplifier
Description
Enable voltage reference
Disable voltage reference
Description
Power down reference core
Power up reference core
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ADV7850