我用的是EP3C25Q240C8,其中162pin是一个复用管脚,datasheet上写着,它既可以用作I/O口,又可以用作nCE0管脚,可是当我把它作为普通I/O来分配的时候,为什么Quartus会报错,说
Error: Can't place multiple pins assigned to pin location Pin_162
info:Pin DIN[0] is assigned to pin location Pin_162
info: Pin ~ALTERA_nCEO~ is assigned to pin location pin_162