VS1011 Datasheet, PDF (25/43 Pages) List of Unclassifed Manufacturers – MP3 AUDIO CODEC

VLSI
Solution ^y
VS1011 PRELIMINARY
VS1011
8. FUNCTIONAL DESCRIPTION
8.6.1 SCI MODE (RW)
SCI MODE is used to control operation of VS1011.
Bit Name
Function
Value Description
0 SM DIFF
Differential
0 normal in-phase audio
1 left channel inverted
1 SM SETTOZERO Set to zero
0 right
1 wrong
2 SM RESET
Soft reset
0 no reset
1 reset
3 SM OUTOFWAV Jump out of WAV decoding 0 no
1 yes
4 SM PDOWN
Powerdown
0 power on
1 powerdown
5 SM TESTS
Allow SDI tests
0 not allowed
1 allowed
6 SM STREAM
Stream mode
0 no
1 yes
7 SM SETTOZERO1 set to zero
0 right
1 wrong, this isn’t zero
8 SM DACT
DCLK active edge
0 rising
1 falling
9 SM SDIORD
SDI bit order
0 MSb first
1 MSb last
10 SM SDISHARE Share SPI chip select
0 no
1 yes
11 SM SDINEW
VS1002 native SPI modes
0 no
1 yes
12 SM SETTOZERO2 set to zero
0 right
1 wrong, this isn’t zero
13 SM SETTOZERO3 set to zero
0 right
1 wrong, this isn’t zero
When SM DIFF is set, the player inverts the left channel output. For a stereo input this creates a virtual
surround, and for a mono input this effectively creates a differential left/right signal.
By setting SM RESET to 1, the player is software reset. This bit clears automatically.
When the user decoding a WAV file wants to get out of the file without playing it to the end, set
SM OUTOFWAV, and send zeros to VS1002c until SM OUTOFWAV is again zero. If the user doesn’t
want to check SM OUTOFWAV, send 128 zeros.
Bit SM PDOWN sets VS1011 into software powerdown mode. Note that software powerdown is not
nearly as power efficient as hardware powerdown activated with the XRESET pin.
If SM TESTS is set, SDI tests are allowed. For more details on SDI tests, look at Chapter 9.6.
Version 0.71, 2004-07-20
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