Analog Devices ADV7610 Hardware User's Manual page 59

Hardware User Guide
Notes
•
Both Table 8 and Table 14 provide a column with the heading 'Corresponding Status Register(s)' . This column lists the status registers
that convey information related to their corresponding audio mute masks or coast masks.
•
The ADV7610 mute works differently for compressed audio data. In the case of compressed audio, mute outputs a constant stream of 0.
•
For the best audio muting performance, the following setting is recommended when the
packets:
•
Set AUDIO_MUTE_SPEED to 1
•
For best audio muting performance, the following settings are recommended when the audio sampling frequency of the audio stream
is greater than 48 kHz:
•
Set AUDIO_MUTE_SPEED to 1
•
Set MAN_AUDIO_DL_BYPASS to 1
•
Set AUDIO_DELAY_LINE_BYPASS to 1
•
For best audio muting performance, the following settings are recommended when the audio sampling frequency of the audio stream
is equal to or lower than 48 kHz:
•
Set AUDIO_MUTE_SPEED to 0x1F
•
Set MAN_AUDIO_DL_BYPASS to 0
MUTE_AUDIO, Addr 68 (HDMI), Address 0x1A[4]
A control to force an internal mute independently of the mute mask conditions.
Function
MUTE_AUDIO Description
0 (default) Audio in normal operation
1 Force audio mute
AUDIO_MUTE_SPEED[4:0], Addr 68 (HDMI), Address 0x0F[4:0]
Number of samples between each volume change of 1.5 dB when muting and unmuting.
Function
AUDIO_MUTE_SPEED[4:0]
0x1F (default)
NOT_AUTO_UNMUTE, Addr 68 (HDMI), Address 0x1A[0]
A control to disable the auto unmute feature. When set to 1, audio can be unmuted manually if all mute conditions are inactive by setting
NOT_AUTO_UNMUTE to 0 and then back to 1.
Function
NOT_AUTO_UNMUTE Description
0 (default) Audio unmutes following a delay set by WAIT_UNMUTE after all mute conditions have become inactive
1 Prevents audio from unmuting automatically
WAIT_UNMUTE[2:0], Addr 68 (HDMI), Address 0x1A[3:1]
A control to delay audio unmute. Once all mute conditions are inactive WAIT_UNMUTE[2:0] can specify a further delay time before
unmuting. NOT_AUTO_UNMUTE must be set to 0 for this control to be effective.
Function
WAIT_UNMUTE[2:0] Description
000 (default) Disables/cancels delayed unmute. Audio unmutes directly after all mute conditions become inactive.
001 Unmutes 250 ms after all mute conditions become inactive.
010 Unmutes 500 ms after all mute conditions become inactive.
011 Unmutes 750 ms after all mute conditions become inactive.
100 Unmutes 1 sec after all mute conditions become inactive.
Description
Default value
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ADV7610 receives multichannel sample
UG-438