AESKEYS AES Key Registers. 0x40007800 0x00 0x400 registers 8 4 MEU[%s] AES-256 SRAM Encryption Key (MEU). 0x00 32 read-write 4 4 XIP[%s] AES-128 QSPI Code Key (MEMPROT XIP). 0x20 32 read-write