1.0 - SATA-IO

GTR-02 – 3Gbs/s Backward CompatibilityPurposeTo verify that a device which claims support for Serial ATA Gen-2 signaling speed (Word 76 bit 2set to one in IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command data), also supportsSerial ATA Gen-1 signaling speed (Word 76 bit 1 set to one in IDENTIFY DEVICE or IDENTIFYPACKET DEVICE command data) and works in both speeds properly.Resource RequirementsAs listed in Resource Requirements on page 11.Last ModificationJanuary 22, 2009DiscussionAn IDENTIFY/IDENTIFY PACKET DEVICE command is issued to device and supporting forSerial ATA Gen-2 signaling is checked. Then Host Emulator tries to establish connection to P.U.T.and execute commands at all claimed speeds. Proper command execution in both speeds is verifiedand Word 76 bit 1 is checked as test criteria. The process is repeated 10 times to be certain of resultpersistency and signature contents are checked to be correct at every run.Test SetupPlease see Appendix BTest Procedure:Please see Appendix BA test project is executed via LeCroy Host emulator at both SATA speeds and the resulting tracewill be captured; then the trace is post-processed to verify the complete execution of test projectand to check the pass/fail criteria. To be sure of result persistency, the test is repeated for 10 timesand “PASSED” result is reported only when all results were “PASSED”.• Test Project:o GTR02-01.stc1) The Host first tries to initiate link (COMRESET signal) at 3G, and thenrepeats the test project at 1.5G2) This project is run for 10 times at both speeds and signature contents arechecked at each run. (See post process)3) An IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command isissued• Post process:o Existence of IDENTIFY DEVICE / IDENTIFY PACKET DEVICE Command inthe trace is checked to verify the proper execution of test project. “ERROR” result isreported if the command was not executed properly.21 Digital MOI for LeCroy STX Bus Analyzer