Integrated in MAIN domain one instance of DDR Subsystem (DDRSS) is used as an interface to external SDRAM devices which can be utilized for storing program or data. DDRSS provides the following main features:
- Support of LPDDR4 memory type
- 32-bit memory bus interface with in-line ECC
- Up to 8 GB memory address range
- System bus interface: little endian only with 256-bit data width
- Configuration bus Interface: little endian only with 32-bit data width
- Support of dual rank configuration
- Support of automatic idle power saving mode when no or low activity is detected
- Class of Service (CoS) - three latency classes supported
- Prioritized refresh scheduling
- Statistical counters for performance management