| 摘要 |
Embodiments of a distributed memory controller system implemented on a single integrated circuit device are described. In one embodiment, a memory controller that provides an interconnection circuit between a first plurality of memory devices to a second plurality of memory clients includes a ring bus to route at least one of the memory request and data return signals between the memory clients and the memory devices. The ring bus is configured in a ring topography that is distributed across a portion of an integrated circuit device, resulting in a reduction in the maximum wiring density at the center of memory controller. The ring bus structure also reduces the overall number of interconnections as well as the number of storage elements, thus reducing the total area used by the memory controller. The ring bus couples memory clients that are physically located within the ring topography on the integrated circuit to external memory devices through memory device interface circuits located on the integrated circuit device. The memory controller also includes deadlock avoidance mechanisms that utilize virtual channels on the ring bus for one or more defined types of bus traffic
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