參考
ug865
配置
D5 PS_MIO8_500 #RE
D8 PS_MIO7_500 CLE
A5 PS_MIO6_500 U12-IO1
A6 PS_MIO5_500 U12-IO0
B7 PS_MIO4_500 U12-IO2
D6 PS_MIO3_500 #WE
B8 PS_MIO2_500 ALE
默認爲nand啓動,通過改變對應引腳的上下拉電阻,將R2578改到R2585,則進入jtag模式,將R2584焊到R2577上,則爲SD卡啓動,