于 2013年03月01日 16:50, Uwe Kleine-König 写道: > puts $byte to I/O[7:0] and 0 to I/O[15:8]. This is what I want it to > do---not sure if I/O[15:8] should better be tri-stated? I am not sure too. :) I do not ever use a 16-bit nand controller. thanks Huang Shijie