Hi,all friends,could someone tell me how to boot from nor flash using i.MX 6 SABRE-SD ? I've tried to fllow the doc <i.MX_Linux_User's_Guide.pdf> , but it could not work. By the way,i have changed the BT_CFG1_4, BT_CFG1_5, BT_CFG4_3, BT_CFG4_4 to high level. Could someone give me some suggestiongs , thanks a lot !