小伙,你的理解是正确的啊~我再给你个官方的回答:
Column I/O banks
refer to the top and bottom I/O banks (also referred to as vertical) and
row I/O banks refer to side (left and right, or horizontal) I/O banks
in Altera® devices.
You can refer to each device handbook for figures showing I/O bank location.
I/O域指的是输入输出所包含的范围,符号I/O域指的是已经编辑好符号表的输入输出。