The TriMatrix memory architecture in Stratix devices allows you to target small, medium, and large memory applications efficiently. Each TriMatrix memory block is optimized for a specific application.
The M512 memory blocks are useful for implementing small first-in first-out (FIFO) buffers, digital signal processing (DSP), and clock domain transfer applications. The M4K memory blocks are used to implement buffers for a wide variety of applications such as storing processor code, implementing look-up schemes, and implementing larger memory applications.
The M-RAM blocks are useful in applications where a large volume of data must be stored on-chip.
For more information on this, please reference the Using TriMatrix Embedded Memory Blocks in Stratix & Stratix GX Devices chapter of the Stratix Device Handbook.