User Manual

VS1003
7 SPI BUSES
7.7.3 SCI Operation in Middle of Two SDI Bytes
0
1
XCS
SCK
SI
7
7 6 5 1
0 0
0 7 6 5 1 0
SDI Byte
SCI Operation
SDI Byte
8 9 39 40 41 46 47
X
DREQ high before end of next transfer
DREQ
Figure 15: Two SDI Bytes Separated By an SCI Operation.
Figure 15 shows how an SCI operation is embedded in between SDI operations. xCS edges
are used to synchronize both SDI and SCI. Remember to respect DREQ as shown in the figure.
Version: 1.08, 2014-12-19 22