Memory Subsystem

The APS3 core uses a 128 kB instruction/boot ROM along with a 160 kB instruction RAM and a 64 kB data RAM. The ATWINC15x0-MR210xB modules come populated with either 4 MB or 8 MB of Flash memory depending on the module model that is ordered. This memory can be used for system software. See Table 1 for more information. 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.