alc260d-ve-lf Realtek Semiconductor Corporation, alc260d-ve-lf Datasheet - Page 18

• Manufacturer Part Number: alc260d-ve-lf
• Description: 2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

7.2.
7.2.1.
An outbound frame is composed of one 32-bit command stream and multiple data streams. There are one or
multiple sample blocks in a data stream. Only one sample block exists in a stream if the HDA controller
delivers a 48kHz rate of samples to the codec. Multiple sample blocks in a stream means the sample rate is
a multiple of 48kHz. This means there should be 2 blocks in the same stream to carry 96kHz
samples (Figure 7).
For outbound frames, the stream tag is not in SDO, but in the SYNC signal. A new data stream is started at
the end of the stream tag. The stream tag includes a 4-bit preamble and 4-bit stream ID (Figure 8).
To keep the cadence of converters bound to the same stream, samples for these converters must be placed in
the same block.
2 Channel High Definition Audio Codec
SYNC
Previous Frame
SDO
Frame Composition
Outbound Frame – Single SDO
Frame SYNC
Sample 1
Block 1
SYNC
BCLK
SDO
Command Stream
Sample Block(s)
msb
A 48kHz Frame is composed of Command stream and multiple Data streams
Sample 2
Block 2
...
Figure 8. SDO Stream Tag is Indicated in SYNC
lsb
Previous Stream
..
..
.
.
msb first in a sample
Preamble Stream=10
Stream 'A' Data
Figure 7. SDO Outbound Frame
Stream 'A' Tag
(Here 'A' = 5)
(4-Bit)
7 6 5 4
One or multiple blocks in a stream
Sample Z
Block Y
Stream Tag
msb
1
3
(4-Bit)
For 48kHz rate, only Block1 is included
For 96kHz rate, Block1 includes (N)
includes (N+1)
Z channels of PCM Sample
0
2
lsb
1 0
1
11
0
th
Data of Stream 10
time of samples
Stream 'X' Tag
(Here 'X' = 6)
Stream 'X' Data
Null Field
th
Track ID: JATR-1076-21 Rev. 1.4
time of samples, Block2
0s
Padded at the
end of Frame
Next Frame
ALC260(D)
Datasheet