File name HyperTransport DUT Connector Specification.pdf
DUT Connector Definition and Test Environment
Proposal from PMC-Sierra, Inc.
Edited by Broadcom Corporation
Edited by Altera Corporation
Edited by Advanced Micro Devices
HyperTransport has a strong need for compatibility testing. An important enabling
element for compatibility testing is to define a standardized connector to use between HT
compatibility testing boards. Along with the connector, a mechanical specification is
required to allow interoperation.
The Consortium does not make claims of suitability of this connector for production
boards as it remains outside the scope of this effort. It will remain up to the individual
companies, producer or consumers of HyperTransport devices to determine this
connector's applicability for their specific product design.
1. Standardized connector
2. Standardized, reliable mechanical arrangement
3. Allows good signal integrity
4. Provides a means of making long HT daisy chains
5. Provides a means of making HT Switch test configurations
6. Mounted horizontally for easy probe access
7. Supports 2, 4, 8, or 16 bit operation
1. Useful for Daughter-Card applications
2. Compatible with the HT 2.x proposal
3. Supplies power to board
4. Supports Dual Host Mode
5. Supports 32 bit operation
6. Allows the probing connector to be used
The specified connectors are the Samtec male connector (QSE) for the top of the board
and the Samtec female connector (QTE) for the bottom of the board. The connectors are
normally mounted in pairs to give maximum flexibility in connecting HT chains, on HT
2.0 the signal integrity may not allow the stubs caused by the second connector so the
configurations are more constrained. The connector on the bottom of the board is always
mounted rotated 180 degrees with respect to the one on the top of the board with most of
the connector pads sharing vias so that pin n of the topside QSE connector is common
with pin 161-n of the bottomside QTE connector (this is not true for a few slow speed
signals). The connector pair on the left side of a board is rotated with respect to the
connector pair on the right side of the board. These orientations seem strange, but allow a
wider range of test configurations, and are best explained using the examples below.
Both connectors are not required to be on each board. It may be useful to put connectors
on both the top and bottom to allow daisy chains of connectors to be constructed.