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DUT Connector Definition and Test Environment
for HyperTransport
Proposal from PMC-Sierra, Inc.
Brian Holden
Mike Meschke
Edited by Broadcom Corporation
Mark Hayter
Edited by Altera Corporation
Ziad Abu-Lebdeh
Edited by Advanced Micro Devices
Renato D'Orfani
Version 14
Introduction
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.
Requirements:
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
Optional Requirements
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
Connector
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.
Samtec
QSE-080-01-F-D-A-GP
Male Connector
Samtec
QTE-080-01-F-D-A-GP
Female Connector
(For reference the SAMTEC QTE-080-01-F-D-EM2-GP is the board edge mounting
connector that mates with the topside DUT connector. This part may be useful for
evaluation boards for cave devices that want to plug in to a DUT option slot on a host
evaluation card that fits in a standard form factor ATX case.)
QSE Series overview:
http://www.samtec.com/signal_integrity/technical_specifications/overview.asp?series=Q
SE
QSE Electrical characteristics report:
http://www.samtec.com/ftppub/testrpt/qteqsew.pdf
Note: it does not matter if the top of one card plugs to bottom of other or bottom to top, in
both cases pin n of a QSE links to pin n of a QTE
1
1
Tunnel 1
1
161-n n 161-n n
Host n 161-n n 161-n Cave
1 1
1 1
Note: it does not matter if the top of one card plugs to bottom of other or
bottom to top, in both cases pin n of a QSE links to pin n of a QTE
QTE QSE 1 1
Under Topside
1
161-n n
161-n
Tunnel
n
161-n n
1
1
1
Note: connectors are really one above the other, they are shown separated here for clarity.
Example
The example configuration above shows a simple system with a host, tunnel and cave.
The Tunnel card shows how the CADOUT and CADIN signals are positioned on the
package of a device with the recommended pinout/ballout. The cards are all connected
using DUT connectors. In each of the connections the board on the left may be plugged
in to the top of the board on the right or the board on the right may be plugged in to the
top of the board on the left. In either case the same signals are connected