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7.16.10.1
Delay Line Control
The audio delay line should be enabled when the ADV7604 is configured for automatic mute. The
audio delay line is controlled by the
AUDIO_DELAY_LINE_BYPASS
MAN_AUDIO_DL_BYPASS, HDMI Map, Address 0x0F, [7]
Function
MAN_AUDIO_DL_BYPASS
0
1
AUDIO_DELAY_LINE_BYPASS, HDMI Map, Address 0x0F, [6]
Function
AUDIO_DELAY_LINE_
BYPASS
0
1
7.16.11 Audio Mute Configuration
The ADV7604 can be configured to mute automatically an L-PCM audio stream when selectable
mute conditions occur. The audio muting is configured as follows:
• Set the audio muting speed via AUDIO_MUTE_SPEED.
• Set NOT_AUTO_UNMUTE, as follows:
Set
NOT_AUTO_UNMUTE
delay set in WAIT_UNMUTE[2:0] after all selected mute conditions have become
inactive.
Set
NOT_AUTO_UNMUTE
external controller) when all selected mute conditions have become inactive.
Select the mute conditions that trigger an audio mute (refer to
• Select the audio PLL coast conditions (refer to Section 7.16.1.3).
• Set WAIT_UNMUTE[2:0] to configure the audio counter that triggers the audio unmute
when it has timed out after all selected mute conditions have become inactive.
Rev. F August 2010
MAN_AUDIO_DL_BYPASS
bits.
Description
Audio delay line is automatically bypassed if multichannel
audio is received. Audio delay line is automatically enabled if
stereo is received.
Overrides the automatic bypass of audio delay line. Audio
delay line is bypassed if AUDIO_DELAY_LINE_BYPASS is
set to 1. Audio delay line is enabled if
AUDIO_DELAY_LINE_BYPASS is set to 0.
Description
Enables the audio delay line. Valid only if
MAN_AUDIO_DL_BYPASS is set to 1.
Bypasses the audio delay line. Valid only if
MAN_AUDIO_DL_BYPASS is set to 1.
to 0 if the audio must be unmuted automatically after a
to 1 if the audio must be muted manually (e.g. by an
145
and
Table
20).
ADV7604
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