6.2.1 Memory Subsystem

The APS3 core uses a 128 KB instruction/boot ROM along with a 128 KB instruction RAM and a 64 KB data RAM. ATWINC1500B also has 8 Mb of flash memory, which can be used for system software. In addition, the device uses a 128 KB shared RAM, accessible by the processor and MAC, which allows the APS3 core to perform various data management tasks on the TX and RX data packets.