不知道怎么理解？

Total injected current (sum of all I/O and control pins)
总注入电流（所有I / O和控制引脚的总和）

When several inputs are submitted to a current injection, the maximum ΣIINJ(PIN) is the absolute sum of the
positive and negative injected currents (instantaneous values).
当几个输入被提交到电流注入时，最大ΣIINJ（PIN）是该输入的绝对和正负注入电流（瞬时值）。