Audio Packet Type Flags - Analog Devices Advantiv ADV7604 Hardware Manual

FIFO_NEAR_OVFL_RAW , IO Map, Address 0x79, [7]
Function
FIFO_NEAR_OVRFL__R
AW
0
1
AUDIO_FIFO_ALMOST_EMPTY_THRESHOLD[5:0] , HDMI Map, Address 0x12, [5:0]
Function
AUDIO_FIFO_ALMOST
_EMPTY_THRESHOLD
[5:0]
111101
xxxxxx
AUDIO_FIFO_ALMOST_FULL_THRESHOLD[5:0] , HDMI Map, Address 0x11, [5:0]
Function
AUDIO_FIFO_ALMOST
_FULL_THRESHOLD
[5:0]
000010
xxxxxx

7.16.3 Audio Packet Type Flags

The ADV7604 can receive and process four types of audio packet:
• Audio sample packets
• DSD packets
• HBR packets
The following flags are provided to monitor the type of audio packets received by the ADV7604.
Figure 54 shows the algorithm that can be implemented to monitor the type of audio packet
processed by the ADV7604.
AUDIO_MODE_CHNG_RAW , IO Map, Address 0x65, [3]
Function
AUDIO_MODE_CHNG_
RAW
0
1
Rev. F August 2010
Description
Audio FIFO is not near overflow.
Audio FIFO is near overflow as the number FIFO registers
containing stereo data is greater or equal to value set in
AUDIO_FIFO_ALMOST_FULL_THRESHOLD.
Reset to 0 by setting FIFO_NEAR_OVRFL _CLR (IO Map,
Address 0x76[7]) to 1.
Description
Default value
Sets threshold used for FIFO_NEAR_UFLO_RAW
Description
Default value
Sets threshold used for FIFO_NEAR_OVRFL_RAW
Description
Type of audio packets received has not changed.
Type of audio packet received by ADV7604 has changed.
AUDIO_SAMPL_PCKT_DET, DSD_PACKET_DET and
HBR_AUDIO_PCKT_DET can be read back to identify type of
audio packet received.
135
ADV7604