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https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/601222/tms320f28055-does-f28055-or-f28069-has-similar-feature-with-tristate-buffer
F28055或 F28069是否具有与三态缓冲器相似的功能？
我们希望防止多个器件(F28055)写入总线。
强
是的、F28055和 F28069都是。 当您将 GPIO 配置为输入时、它将是一 个浮动三态引脚。
注意： 您需要禁用上拉电阻、否则 引脚将被拉高。
此致、 Cody
