Internal Mute Status; Av Mute Status; Audio Stream With Incorrect Parity Error - Analog Devices ADV7850 Hardware Manual

Bit Name
mt_msk_chng_port
mt_msk_vclk_det

Internal Mute Status

7.31.2
The internal mute status is provided through the internal_mute_raw control.
internal_mute_raw, IO, Address 0x65[6] (Read Only)
This readback indicates the raw status signal of the internal mute signal.
Function
internal_mute_raw
0 
1

AV Mute Status

7.31.3
av_mute, Addr 68 (HDMI), Address 0x04[6] (Read Only)
This readback displays the avmute status received in the last general control packet received.
Function
av_mute
0 
1

Audio Stream with Incorrect Parity Error

7.31.4
The ADV7850 discards audio sample packets that have an incorrect parity bit. When these samples are received, the ADV7850 repeats the
previous audio sample with a valid parity bit. The audio stream out of the ADV7850 can be muted in this situation if the audio mute mask
mt_msk_parity_err is set.
It is possible to configure the ADV7850 so that it processes audio sample packets that have an incorrect parity bit and corrects the parity
bit. The ADV7850 can then output an audio stream even when the parity bits from the audio sample packet are invalid. This
configuration is activated by setting
ignore_parity_err, Addr 68 (HDMI), Address 0x1A[6]
This control is used to select the processing of audio samples even when they have a parity error.
Function
ignore_parity_err
0 
1
mt_msk_parity_err, Addr 68 (HDMI), Address 0x14[1]
This control is used to set the audio mute mask for a parity error. It sets the audio mutes if an audio sample packet is received with an
incorrect parity bit.
Rev. A May 2012
HDMI Map Description
Address
audio packets by the ECC block
0x16[1] Causes audio mute if HDMI port is changed
0x16[0] Causes audio mute if TMDS clock is not detected
Description
Audio not muted
Audio muted
Description
avmute not set
avmute set
mt_msk_parity_err
Description
Discard audio sample packets that have invalid parity bit
Process audio sample packets that have invalid parity bit
to 0 and ignore_parity_err
194
Corresponding Status
Registers(s)
hdmi_port_select[2:0]
tmds_clk_a_raw
tmds_clk_b_raw
tmds_clk_c_raw
tmds_clk_d_raw
to 1.
ADV7850