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pcm1754使用方法

Other Parts Discussed in Thread: PCM1754

想请教下ti的大佬们,pcm1754的使用方法

以下是我的配置:

VCC(pin6)=5V,DEMP(pin13)=L,MUTE(pin14)=L,FMT(pin15)=H,

使用i2s的通信方式

BCK(pin1)=1.53MHz,LRCK(pin3)=48kHz

想问的是对于该芯片系统主时钟SCK(pin16)有没有要求?该芯片的输出引脚VOUTL(7)和VOUTR(8)的输出电平为2.5V有没有影响呢?

感谢

  • 这个system clock的值不是指的是BCK(pin1)的吗,我想问的是SCK(pin16)的值,谢谢
  • system clock即为SCLK, sampling clock即为LRCK=fs。 那么BCLK和LRCK的关系datasheet中有给出解释:

    标准的右对齐方式:BCLK=32,48,64*LRCK。

    16bit的右对齐方式:BCLK=32*LRCK

    左对齐方式: BCLK=48,64*LRCK

    The BCK pin can be operated at 32, 48, or 64 times the sampling frequency for standard (right justified) format, and 32 times the sampling frequency of the BCK pin is limited to 16-bit right-justified format only. The BCK pin can be operated at 48 or 64 times the sampling frequency for the I2S and left-justified formats. 48 times the sampling frequency of BCK is limited to 192/384/768 fS SCKI.

    那么系统时钟SCK的话,参考: