Waveshare Music Shield User Manual page 5

Music Shield User Manual
0x4 rw
0x5 rw
0x6 rw
0x7 rw
0x8 r
0x9 r
0xA rw
0xB rw
0xC rw
0xD rw
0xE rw
0xF rw
Here are brief introductions about the main registers. (Please see the section SCI Registers of
VS1053b datasheet for more details)
SCI_MODE Register: it is used to control the operation of VS1053b.
Bit Name
0 SM_DIFF
1 SM_LAYER12
2 SM_RESET
3 SM_CANCEL
4 SM_EARSPEAKER
5 SM_TESTS
6 SM_STREAM
7 SM_EARSPEAKER
8 SM_DACT
9 SM_SDIORD
Revision 1.1. Date: December 7, 2015. Author: W. L. Yan. Editor: Felix.
0 100 CLKI DECODE_TIME
0 450 CLKI AUDATA
0 100 CLKI WRAM
0 80 CLKI WRAMADDR
0 80 CLKI HDAT0
0 210 CLKI HDAT1
0 80 CLKI AIADDR
0 80 CLKI VOL
0 80 CLKI AICTRL0
0 80 CLKI AICTRL1
0 80 CLKI AICTRL2
0 80 CLKI AICTRL3
Function
Differential
Allow MPEG layers I & II
Soft reset
Cancel decoding current file
EarSpeaker low setting
Allow SDI tests
Stream mode
EarSpeaker high setting
DCLK active edge
SDI bit order
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Decode time in seconds
Misc. audio data
RAM write/read
Base address for RAM write/read
Stream header data 0
Stream header data 1
Start address of application
Volume control
Application control register 0
Application control register 1
Application control register 2
Application control register 3
Value Description
0 normal in-phase audio
1 left channel inverted
0 no
1 yes
0 no reset
1 reset
0 no
1 yes
0 off
1 active
0 not allowed
1 allowed
0 no
1 yes
0 off
1 active
0 rising
1 falling
0 MSb first
1 MSb last
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