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TAS5805M: 芯片DSP配置寄存器单位问题

Part Number: TAS5805M

在TAS5805MProcess Flows的文档后边的寄存器表格里有寄存器的描述,但是看不出来单位是怎么计算的。

比如音量,默认值是0x00800000,根据网友们的程序知道是0dB,但是怎么计算的就不知道了,有个表格上写着 4 / 9.23,4代表这个寄存器字节个数,9.23是什么意思?烦请TI工程师能够解答一二。