Analog Devices ADV7850 Hardware Manual page 185

i2sbitwidth[4:0], Addr 68 (HDMI), Address 0x03[4:0]
This control is used to adjust the bit width for right justified mode on the I2S interface.
Function
i2sbitwidth[4:0]
xxxxx
00000
00001
00010
11000 
11110
11111
i2soutmode[1:0], Addr 68 (HDMI), Address 0x03[6:5]
This control is used to configure the I2S output interface.
Function
i2soutmode[1:0]
00 
01
10
11
Notes:
i2soutmode is effective when the ADV7850 is configured to output I2S streams or AES3 streams. This is the case in the following
situations:
• The ADV7850 receives audio sample packets.
• The ADV7850 receives HBR packets, ovr_ mux_hbr is set to 1, and mux_hbr_out is set to 2'b00, 2'b01, 2'b10 or 2'b11.
• In HBR mode, it is required that the part outputs four SPDIF, I
word. Therefore, i2sbitwidth should always be set to 0b11000.
The following audio formats can be output when the ADV7850 receives audio sample packets:
• L-PCM audio data is output on the audio output pins if the part received audio sample packets with L-PCM encoded audio data.
Each audio output pin carries stereo data that can be output in I
Figure 65, and Figure
justified respectively on the audio output pins.
•
A stream conforming to the IEC60958 specification when the part receives audio sample packets with L-PCM encoded data
(refer to Figure 67).
• An AES3 stream if
SPDIF. Each AES3 stream may encapsulate stereo L-PCM audio data or multichannel non L-PCM audio data, for example, 5.1
Dolby Digital.
• Binary stream on the audio output pins when the part receives audio sample packets with non L-PCM encoded audio data (that
is, AC-3 compressed audio) and if the following configuration is used:

i2soutmode must be set to 0x0, 0x01, or 0x2 for I
64, Figure

mt_msk_comprs_aud is set to 0
Note that no audio flags are output by the part in that configuration. Each binary stream output by the part may
encapsulate stereo L-PCM audio data or multichannel non L-PCM audio data, for example, 5.1 Dolby Digital.
• A stream conforming to the IEC61937 specification when the part receives audio sample packets with non L-PCM encoded
audio data, for example, AC-3 compressed audio. The audio outputs can carry an audio stream that may be stereo or
multichannel audio, for example, 5.1 Dolby Digital.
Rev. A May 2012
Description
Number of bits
0 bit
1 bit
2 bits
24 bits
30 bits
31 bits
Description
I2S mode
Right justified
Left justified
Raw SPDIF (IEC60958) Mode
66). The i2soutmode[1:0]
i2soutmode[1:0] is set to 0x3 (refer to
65, and Figure 66)
S, or raw IEC60958 streams encapsulating a 24-bit audio sample
2
2 S, right justified, or left justified mode (refer to
control must be set to 0x0, 0x01 or 0x2 to output I
Figure 68 and Figure
S, right justified, and left justified format, respectively (refer to
2
185
S, right justified, and left
2
69). Note that AES3 is also referred to as raw
ADV7850
Figure 64,
Figure