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u010328074 2013-04-28
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是直接调用函数？有什么管脚没？还是不太清楚。。
lbing7 2013-04-28
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8.6.11 SCI_VOL (RW)
SCI_VOL is a volume control for the player hardware. For each channel, a value in the range of
0..254 may be defined to set its attenuation from the maximum volume level (in 0.5 dB steps).
The left channel value is then multiplied by 256 and the values are added. Thus, maximum
volume is 0 and total silence is 0xFEFE.
Example: for a volume of -2.0 dB for the left channel and -3.5 dB for the right channel: (4*256)
+ 7 = 0x407. Note, that at startup volume is set to full volume. Resetting the software does not
reset the volume setting.
Note: Setting SCI_VOL to 0xFFFF will activate analog powerdown mode
这个寄存器...
LZ还需要仔细看数据手册
http://www.vlsi.fi/datasheets/vs1003.pdf
