嗯，是单电源的。应该不能输入负压的。
对于LRCLK的理解，你是对的。而且芯片来对LRCLK、MCLK、SCLK有严格的规定：
4.2.1 Slave Mode
LRCK and SCLK operate as inputs in Slave mode. The left/right clock must be synchronously derived from the master
clock and be equal to Fs. It is also recommended that the serial clock be synchronously derived from the master
clock and be equal to 64x Fs to maximize system performance. Refer to Table 2 for required clock ratios.
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