Audio Stream With Incorrect Parity Error; Audio Clock Regeneration Parameters; Acr Parameters Readbacks - Analog Devices Advantiv ADV7604 Hardware Manual

7.16.12 Audio Stream with Incorrect Parity Error

The ADV7604 discards audio sample packets that have an incorrect parity bit. When these samples
are received, the ADV7604 repeats the previous audio sample with a valid parity bit. The audio
stream out of the ADV7604 can be muted further in this situation if the audio mute mask
MT_MSK_PARITY_ERR is set.
It is possible to configure the ADV7604 so that it processes audio sample packets that have an
incorrect parity bit. The ADV7604 can then output an audio stream even when the parity bits from
the audio sample packet are invalid. This configuration is activated by setting
MT_MSK_PARITY_ERR
IGNORE_PARITY_ERR, HDMI Map, Address 0x1A, [6]
Function
IGNORE_PARITY_ERR
0
1
DISCARD_CS_DATA, HDMI Map, Address 0x50, [2]
Function
DISCARD_CS_DATA
0
1

7.17 Audio Clock Regeneration Parameters

The ADV7604 recreates an internal audio master clock using Audio Clock Regeneration (ACR)
values transmitted by the HDMI source.

7.17.1 ACR Parameters Readbacks

The registers N and CTS can be read back from the HDMI Map.
CTS, ACR CTS, HDMI Map, Address 0x5B, [7:0]; Address 0x5C, [7:0]; Address 0x5D, [7:4]
Function
CTS
CTS[19:12]
CTS[11:4]
CTS[3:0]
xxxxxxxx xxxxxxxx xxxx
Rev. F August 2010
to 0 and IGNORE_PARITY_ERR
Description
Discards audio sample packets that have an invalid parity error bit
Processes audio sample packets that have an invalid parity error
bit
Description
CS DATA VALID flag generated on receipt of any CS data
CS DATA VALID flag not generated unless CS data in consistent
between two repections of CS data
Description
Address 0x5B, [7:0]
Address 0x5C, [7:0]
Address 0x5D, [7:4]
Readback value for CTS
150
to 1 and DISCARD_CS_DATA
ADV7604
to 1.