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VS1003 Datasheet(PDF) 21 Page - VLSI Solution Oy

Part # VS1003
Description  VS1003 - MP3/WMA AUDIO CODEC
PDF  61 Pages
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Manufacturer  VLSI [VLSI Solution Oy]
Direct Link  https://www.vlsi.fi/
Logo VLSI - VLSI Solution Oy

VS1003 Datasheet(HTML) 21 Page - VLSI Solution Oy

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VS1003
7
SPI BUSES
7.7
SPI Examples with SM_SDINEW and SM_SDISHARED set
7.7.1
Two SCI Writes
0
1
2
3
30
31
1
0
1
0
0
0
0
0
0
0
X
X
XCS
SCK
SI
2
32
33
61
62
63
SCI Write 1
SCI Write 2
DREQ
DREQ up before finishing next SCI write
Figure 13: Two SCI Operations.
Figure 13 shows two consecutive SCI operations. Note that xCS must be raised to inactive
state between the writes. Also DREQ must be respected as shown in the figure.
7.7.2
Two SDI Bytes
1
2
3
XCS
SCK
SI
7
6
5
4
3
1
0
7
6
5
2
1
0
X
SDI Byte 1
SDI Byte 2
0
6
7
8
9
13
14
15
DREQ
Figure 14: Two SDI Bytes.
SDI data is synchronized with a raising edge of xCS as shown in Figure 14. However, every
byte doesn’t need separate synchronization.
Version: 1.09, 2018-03-16
21



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