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HT Tunnel (GHT-Tunnel)
HyperTransport technology is a highspeed, low-latency, point-to-point link for interconnecting integrated circuits (ICs) on a board. It is a packet-based link implemented on two independent unidirectional sets of wires. HyperTransport tunnel is a popular topology with dual HyperTransport links which allows daisy chaining of tunnel devices to create an IO channel, connecting multiple I/O devices to a host system. GDA's HyperTransport Tunnel core, is designed for reuse and it's flexible backend interface makes it easy to be integrated into wide range of applications. The core provides highly scalable upstream and downstream bandwidths through programmable link widths and frequencies.



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      Features

  • Proven design compliant with HyperTransport I/ O
    Link Specification, Version 1.03
  • Provides dual HyperTransport links
  • Either link can be hardware configured for 16- bit or
    8- bit link interface
  • Either link supports software programmable link
    widths of 16, 8, 4, or 2bits.
  • Either link can be configured as upstream Either link supports 800, 600, 500, 400, or 200 MHz
    Link frequency
  • Maximum bandwidth is 6.4 GB/sec on both links
    Supports independent link width and frequency for
    each link
  • Supports link disconnect protocol
  • Supports interrupt.
  • Supports external and internal loop backs on both HyperTransport links
  • Optional transaction interface provides target and initiator interfaces Optional packet interface for network applications