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.

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

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