A 285 MHz 6-port plesiochronous router chip with non-blocking cross-bar switch

The HAL router chip is a 285 MHz 6-port plesiochronous packet-switched routing chip with non-blocking cross-bar switch. It combines very high bandwidth (4.5 GByte/s per port, 27 GByte/s total raw bandwidth), low fall-through latency (32 ns), no internal blocking, three arbitration priorities with in-order delivery, a flexible source routing scheme, virtual-cut-through routing, and robust reverse flow control.