Now I use your company's product IMX6Q as my CPU, and I try to used the TrustZone function. Now I want to set the UART4 as a untrust peripheral .The datasheet say I should configure the register CSU and AIPSTZ. USART4 is belong to AIPS-2, but I can not find which OPACR the UART4 belong to . Is there other datasheet introduce this imformation? Can you help me?