64.5.1 Memory Mapping

The SECUMOD embeds 5 Kbytes of SRAM split in two parts: the lower 4 Kbytes are erased in case of intrusion (BUSRAM4KB) while the upper 1 Kbyte is never erased (BUSRAM1KB). A 256-bit register bank is available as an additional memory and is totally erased in case of intrusion (BUREG256b).

All memories support 8-bit, 16-bit and 32-bit access sizes.

For power optimization, the transfers between the processor and these memories are performed at bus clock divided by 4.