General Control And Mode Information; Figure 73: Reading Valid Channel Status Flags - Analog Devices ADV7850 Hardware Manual

Check if the CS_DATA_VALID
interrupt has triggered
Read the channel status bits
and decide if they are valid
Notes:
•
cs_data_valid_raw indicates that the first 40 of the channel status bits sent by the upstream transmitter have been correctly
collected. This bit does not indicate if the content of the channel status bit is corrupted as this is indeterminable.
•
A corresponding interrupt can be enabled for cs_data_valid_raw by setting the mask cs_data_valid_mb1 or cs_data_valid_mb2.
Refer to Section 15

General Control and Mode Information

7.33.2
The general control and mode information are specified in Byte 0 of the channel status. For more information, refer to the IEC60958
standards.
cs_data[0], Consumer/Professional Application, HDMI Map, Address 0x36, [0]
Function
cs_data[0]
0 <<
1
cs_data[1], PCM/non-PCM Audio Sample, HDMI Map, Address 0x36, [1]
Function
cs_data[1] Description
0 << Audio sample word represents linear PCM samples
1 Audio sample word used for other purposes
Rev. A May 2012
Enable the CS_DATA_VALID_ST
Initialization
NO
Set CS_DATA_VALID_CLR to 1
Read the channel status bits in HDMI
The channel status bits previously

Figure 73: Reading Valid Channel Status Flags

for additional information on the interrupt feature.
Description
Consumer application
Professional application
Start
interrupt
Is
CS_DATA_VALID_S
T set to 1 ?
YES
Is
CS_DATA_VALID_R
AW set to 1
YES
Map Reg 0x36 to 0x3A
Is
CS_DATA_VALID_S
T set to 1 ?
NO
read are valid
197
NO
The channel status bits previously
read are not valid
YES
ADV7850