Audio Codec Controller (ACC)
User Manual All information provided in this document is subject to legal disclaimers. © REALTEK 2019. All rights reserved.
387
23 22 21
2
1
0
23 22 21
2
1
0
1/
f
s
Right Channel
Left Channel
SD_I
or
SD_O
SCK
WS
Fig 18-8 PCM mode A-N data format
18.3.3
Control Part
18.3.3.1
SPORT Control
Before transferring audio data, you need to configure the related parameters, such as sampling resolution, channel number, data format, clock
source, etc.
Refer to SPORT control registers for details.
18.3.3.2
SI Control
Before transferring audio data, you also need to configure the related parameters on audio codec side. In other words, it’s necessary to drive
the audio codec circuit to record or play well by setting audio codec registers via SI bus.
The SI write and read timing are illustrated in Fig 18-9 and Fig 18-10 respectively.
SI write (slave side):
0
x
A
7
A
1
A
0
D
15
D
14
D
13
D
2
D
1
D
0
700 ns
SI_DI
SI_CK
SI_ENB
100 ns
A
6
A
2
D
3
SI_DO
SI_D_OEN
0
x
12.5ns
25ns
50ns
87.5ns
Fig 18-9 SI write timing
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2019-05-15 10:08:03