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PCM1789 PIN18,19,24可否悬空

Other Parts Discussed in Thread: PCM1789

Dears:

由于MCU 资源不够,PCM1789 PIN18,19,24可否悬空不用? 另外PIN17 AMUTEI脚,典型应用上用了一个电阻上拉,这个可以去掉么?谢谢!

  • 您好,
    PIN18,19是输出管脚,是用来检测信道的输入数据在1024个采样周期(LRCK时钟周期)内是否保持在“0”或“1”的,可以悬空不用
    PIN24是输入管脚不能悬空,您是使用的哪种控制模式,Hardware, I2C, or SPI?不同的控制方式pin24是不同的功能,I2C, or SPI模式的话,pin24是设置地址的,Hardware的话,需要置低
    PIN17 AMUTEI的上拉电阻应该是不能去掉的,在数据手册7.3.6 AMUTE Control章节部分,有专门的一句话进行说明需要接上拉才能正常工作:Because AMUTEI is not terminated internally and AMUTEO is an open-drain output, pull-ups by the appropriate resistors are required for proper operation.
  • Amy:

    我看规格书上的描述,PIN23跟PIN24的功能一样,能帮忙再看看能否去掉一个管脚

  • 您是使用的哪种控制模式,Hardware, I2C, 还是 SPI?