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表单
http://www.ti.com/lit/ds/symlink/tms320f28027.pdf
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表6-40. I2C 开关特性 低电平输出电压 3mA 灌电流
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5.4建议运行条件
低电平输出灌电流,VOL = VOL (MAX),IOL 组2 (2) : 8mA
(2)组2引脚如下:GPIO16、GPIO17、GPIO18、GPIO19、GPIO28 (SDAA)、 GPIO29 (SCLA)、GPIO36、GPIO37
什么是 I2C SDA&SCL 灌电流 能力