Hello!you need to configure the Resource isolation slave unit for address space protection in order to let the HPDMA1 master to have access to SRAM2 or SRAM1   /*RISAF2 => SRAM1_AXI */  /*RISAF3 => SRAM2_AXI */RISAF3->REG[0].CFGR = 0x00000000;RISAF3-...