Volume Controls - Analog Devices ADV7850 Hardware Manual

hp1_atten[4:0], Addr 5C (audio_codec), Address 0x06[4:0]
This control is used to set headphone amplifier attenuation (0 dB to -46.5 dB in -1.5 dB steps).
Function
hp1_atten[4:0]
00000 
hp_scp, Addr 5C (audio_codec), Address 0x05[3]
This control is used to enable short circuit protection.
Function
hp_scp
0 
1
hp_clamp_op, Addr 5C (audio_codec), Address 0x07[1]
This control is used to unclamp headphone outputs from AGND.
Function
hp_clamp_op
0 
1

Volume Controls

11.3.4
vol_dac_left[7:0], Addr 5C (audio_codec), Address 0x10[7:0]
This control is used to set the volume control.
Volume in dB = value * -0.375 dB
vol_dac_right[7:0], Addr 5C (audio_codec), Address 0x11[7:0]
This control is used to set the volume control.
Volume in dB = value * -0.375 dB
The DAC output is also available as a stereo headphone output. The headphone output level can be attenuated using the hp1_atten[4:0]
control.
vol_adc_left[7:0], Addr 5C (audio_codec), Address 0x18[7:0]
This control is used to set the volume control.
Volume in dB = value * -0.375 dB
vol_adc_right[7:0], Addr 5C (audio_codec), Address 0x19[7:0]
This control is used to set the volume control.
Volume in dB = value * -0.375 dB
Rev. A May 2012
Description
0dB ...
Description
Enable short circuit protection
Disable short circuit protection
Description
Clamp output
Disable clamp
340
ADV7850