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F2808 SPI 片选

在F2808做SPI从站时,手册中描述的都是片选信号 低电平有效,而在引脚复用时,此信号的表示方式为SPISTE,那么此时是高电平有效吗?

  • 以手册为主 SPISTE低电平片选
  • The SPISTE pin operates as the slave-select pin. An active-low signal on the SPISTE pin allows the slave
    SPI to transfer data to the serial data line; an inactive- high signal causes the slave SPI serial shift register
    to stop and its serial output pin to be put into the high-impedance state. This allows many slave devices to
    be tied together on the network, although only one slave device is selected at a time.