Teledyne LeCroy SAS Verification Test Descriptions - Manual (Page 155)

University of New Hampshire
InterOperability Laboratory
Test 6.7.1.6: Phy Capabilities Bits – TX SSC Type
Purpose
To verify that bit 1 of the phy capabilities bits correctly reflects the method of Spread
Spectrum Clocking employed by the DUT.
References
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6.7.4.2.3.3 SAS Standard
Resource Requirements
●
A Protocol Generator/Analyzer capable of transmitting and receiving SAS OOB signals
and SAS 2.0 Speed Negotiation.
Modification Record
●
06-25-2007: Initial Draft (Michael Davidson).
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06-29-2007: Fixed references, changed title numbering (Michael Davidson).
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07-20-2007: Expanded procedure (Michael Davidson).
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08-01-2007: Removed irrelevant information from the discussion. Corrected
title/discussion for new capabilities naming conventions (Michael Davidson).
Discussion
A TX SSC TYPE bit set to one indicates that the phy's transmitter uses center-spreading
SSC when the SSC is enabled. A TX SSC TYPE bit set to zero indicates that the phy's transmitter
uses down-spreading SSC when SSC is enabled, or that the phy does not support SSC.
Test Setup
●
The DUT and the Testing Station are physically connected the the DUT is powered off.
Procedure
1. Power on the DUT.
2. The testing station is instructed to transmit COMINIT/COMRESET to the DUT.
3. The DUT is expected to respond with COMINIT/COMRESET.
4. The testing station is instructed to transmit COMSAS to the DUT.
5. The DUT is expected to respond with COMSAS.
6. Upon reception of COMSAS from the DUT, the Testing station is instructed to transmit
D.C. Idle for one RCDT. The DUT is expected to do the same.
7. Following RCDT, the testing station is instructed to transmit ALIGN(0) primitives at 1.5
Gbps for one SNTT. If the DUT supports 1.5 Gbps signaling, it is expected to do the
same. If the DUT does not support 1.5 Gbps signaling, it should continue to transmit
D.C. Idle.
8. The Testing station is then instructed to transmit D.C. Idle for one RCDT. If the DUT
supports 3.0 Gbps. The DUT is expected to do the same.
9. Following RCDT, the testing station is instructed to transmit ALIGN(1) primitives at 3.0
Gbps for one SNTT. If the DUT supports 3.0 Gbps signaling, it is expected to the same.
10. The Testing Station is then instructed to transmit D.C. Idle for one RCDT. The DUT is
expected to do the same.
11. The Testing Station is the instructed to transmit its Phy Capabilities bits indicating
support for all speeds and SSC settings. The DUT is expected to transmit it's Phy
Capabilities Bits.
Observable Results
UNH-IOL SAS 2.0 Speed Negotiation
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