Analog Devices ADV7850 Hardware Manual page 376

Channel Status
Bit
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42-191
Figure 133 shows how the channel number bits 20 to 23 are set, based on the layout bit and sample_present.spx bit, which indicate if
subpacket x contains audio samples(s). The layout bit in the Audio Sample packet header and the sample_present.spx bit are determined
based on the values programmed in audioif_cc[2:0].
For example, if audioif_cc[2:0]
will contain information for channels 1 and 2. If
sample_present.sp0 is set to 1, sample_present.sp1 is set to 1, and sample_present_sp2 is set to 0.
Rev. A May 2012
Channel Status Bit Name
Channel number
Channel number
Channel number
Sampling frequency
Sampling frequency
Sampling frequency
Sampling frequency
Clock accuracy
Clock accuracy
Not Defined
Not Defined
Word length
Word length
Word length
Word length
Original sampling frequency
Original sampling frequency
Original sampling frequency
Original sampling frequency
CGMS-A
CGMS-A
Not Defined
is set to 0b001, which indicates stereo audio, the layout bit will be zero and all Audio Sample subpackets
audioif_cc[2:0]
Main Map Bit
See Figure 133
See Figure 133
See Figure 133
0x15[4]
0x15[5]
0x15[6]
0x15[7]
0x12[0]
0x12[1]
0
0
0x14[0]
0x14[1]
0x14[2]
0x14[3]
0
0
0
0
0
0
0
is set to 0b011, indicating four channels, the layout bit is set to 1;
376
Main Map Bit Name or Fixed
Value
See Figure 133
See Figure 133
See Figure 133
i2s_sf[0]
i2s_sf[1]
i2s_sf[2]
i2s_sf[3]
clk_acc[0]
clk_acc[1]
0
0
word_length[0]
word_length[1]
word_length[2]
word_length[3]
0
0
0
0
0
0
0
ADV7850