Mclkout Setting; Audio Channel Mode; Audio Muting - Analog Devices Advantiv ADV7619 Hardware User's Manual

Hardware User Guide
MUX_HBR_OUT , Addr 68 (HDMI), Address 0x01[1]
A control to manually select the audio output interface for HBR data. Valid when OVR_MUX_HBR is set to 1.
Function
MUX_HBR_OUT
0 (default)
1

MCLKOUT SETTING

The frequency of audio master clock MCLKOUT is set using the MCLK_FS_N[2:0] register, as shown in Equation 3, in the relationship
between MCLKOUT, MCLKFS_N, and f
MCLKOUT = (MCLKFS_N[2:0] + 1) × 128 × f
MCLK_FS_N[2:0] , Addr 4C (DPLL), Address 0xB5[2:0]
Selects the frequency of MCLK out as multiple of 128 fs.
Function
MCLK_FS_N[2:0]
000
001 (default)
010
011
100
101
110
111
Notes
When I2S_TDM_MODE_ENABLE is set to 1, only the following fs ratios for MCLKOUT are valid: 1, 2, or 4.

AUDIO CHANNEL MODE

AUDIO_CH_MD_RAW indicates if 2-channel audio data or multichannel audio data is received.
AUDIO_CH_MD_RAW , IO, Address 0x65[4] (Read Only)
Raw status signal indicating the layout value of the audio packets that were last received.
Function
AUDIO_CH_MD_RAW
0
1
Note: The Audio CH_MD_RAW flag is valid for audio sample packets and DSD packets.
AUDIO_CHANNEL_MODE , Addr 68 (HDMI), Address 0x07[6] (Read Only)
Flags stereo or multichannel audio packets. Note stereo packets may carry compressed multichannel audio.
Function
AUDIO_CHANNEL_MODE
0
1

AUDIO MUTING

The ADV7619 integrates an advanced audio mute function that is designed to remove all extraneous noise and pops from a 2-channel
L-PCM audio stream at sample frequencies up to 48 kHz.
The hardware for audio mute function is composed of the following three blocks:
•
Audio delay line that delays Channel 1 and Channel 2 by 512 stereo samples.
Description
2
Override by outputting I S data
Override by outputting SPDIF data
.
s
S
Description
128 fs
256 fs
384 fs
512 fs
640 fs
768 fs
Not valid
Not valid
Description
The last audio packets received have a layout value of 1. (For example, Layout-1 corresponds to
2-channel audio when audio sample packets are received.)
The last audio packets received have a layout value of 0. (For example, Layout-0 corresponds to
8-channel audio when audio sample packets are received.)
Description
Stereo audio (may be compressed multichannel)
Multichannel uncompressed audio detected (Channel 3 to Channel 8).
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