MM-6165D 2GB or 4GB 64-bit/66MHz PMC SDRAM Memory Buffer

The MM-6165D controller has a rev. 2.3 compliant PCI interface and operates in both 64-bit and 32-bit PCI modes at 33MHz or 66MHz and is capable of burst mode accesses at the full bus bandwidth at 66MHz. The peak transfer rate is 533 MB/s. In addition to handling data management, the controller corrects single bit errors and provides double bit detection.

The DMA has been optimized for multi-threaded operating systems and cluster implementations. Instead of just generating an interrupt after a transfer, the DMA writes a semaphore to the host in host memory when the transfer is complete so the host does not have to pole the status of the DMA. The array utilizes SDRAM devices of differing densities to provide up to 4GB of memory.

The MM-6165D can easily provide buffer expansion memory on cards with PMC sites. Memory on the PCI bus is mapped into I/O space, which easily creates a separate and distinct memory partition for buffering data, caching data, or storing application files.