Teledyne LeCroy SAS Verification Test Descriptions - Manual (Page 151)

University of New Hampshire
InterOperability Laboratory
Test 6.7.1.4: Rate Change Delay Time
Purpose
To verify that the DUT properly formats it's SNTT.
References
●
6.7.4.2.2 SAS Standard
●
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).
●
07-20-2007: Expanded procedure (Michael Davidson).
Discussion
If a phy supports SNW-3, then the phy:
a) transmits a 32-bit phy capabilities value describing the capabilities of they phy.
b) receives a 32-bit phy capabilities value from the attached phy. If the attached phy
does not support SNW-3, they phy capabilities bits are all set to zero (i.e., D.C.
Idle).
If a phy does not support SNW-3, then a phy:
a) transmits D.C. Idle.
b) ignores any SNW-3 phy capabilities bits received.
The transmitter shall:
a) transmit D.C. Idle for an RCDT.
b) transmit 32 phy capabilities bits.
c) transmit D.C. Idle for the remainder of SNTT.
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
UNH-IOL SAS 2.0 Speed Negotiation
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