如DATA SHEET所述(GPIO0-GPIO11 引 脚上的上拉电阻器在复位时并不启用。 GPIO12-GPIO87 引 脚上的上拉
电阻器复位时被启用。)
实际测试时发现GPIO44-47,GPIO80-83输出低电平,导致电平转换芯片74LVC4245输出低电平,致系统误动作。
而同一块板子程序烧写时,GPIO24,25却输出高电平,74LVC4245转换后输出高电平。
很困惑,有论坛大神了解原因吗?
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