Specifications

SATA-IO Confidential 65
For products which support 3Gb/s, this requirement must be tested at both interface rates (1.5Gb/s and 3Gb/s).
Note that the specification stipulates a Detection Threshold with value of V
thresh
, where V
thresh
is 50 ≤ V
thresh
≤ 200 in
millivolts (mV) for 1.5Gb/s devices, and where V
thresh
is 75 ≤ V
thresh
≤ 200 in millivolts (mV) for 3Gb/s devices. For the
interests of the Interoperability Program, the measurements will only be taken to verify this requirement at the lower
and upper limits. The signal amplitude level of the source generator shall be validated using a mode voltage
measurement at 0.45 to 0.55 UI.
To execute this test on a device which supports 1.5Gb/s, a COMINIT/COMRESET burst is issued to the product at the
following voltage threshold limits:
• OOB-01a - 40mV (at this limit, the product is expected to NOT detect the OOB signaling)
• OOB-01b - 210mV (at this limit, the product is expected to detect the OOB signaling)
To execute this test on a device which supports 3Gb/s, a COMINIT/COMRESET burst is issued to the product at the
following voltage threshold limits:
• OOB-01c - 60mV (at this limit, the product is expected to NOT detect the OOB signaling)
o NOTE : Tool resolution preference is even values, as opposed to 75mV
• OOB-01d - 210mV (at this limit, the product is expected to detect the OOB signaling)
NOTE: In a case where a device supports Asynchronous Signal Recovery, it is possible that a device may transmit
COMINIT pro-actively and not in direct response to a COMRESET. In verification of this test requirement, it is
essential that the tester be able to extract any COMINIT response which may be as a result of Asynchronous Signal
Recovery, and simply verify COMINIT responses as a result of COMRESET receipt from the host.
Suggested test methodology requires sending the following test sequence continuously from a suitable generator:
6 x (COMINIT/COMRESET burst + 480UI
OOB
gap) +
1 x (45,000UI
OOB
gap)
1) Using a suitable instrument (e.g. real-time scope or equivalent) to observe a minimum continuous 2ms
window, verify that the PUT consistently responds to each COMINIT/COMRESET burst.
2) Detection Tests: Changing the COMINIT/COMRESET burst amplitude values only, verify that the PUT
continues to consistently respond to an COMINIT/COMRESET Burst amplitude value of 210mV.
3) No-Detection Tests: Changing the COMINIT/COMRESET burst amplitude values only, verify that the PUT
consistently DOES NOT respond to an COMINIT/COMRESET burst amplitude value of 40mV for 1.5Gb/s
products (60mV for 3Gb/s products), with the exception of unsolicited COMINIT bursts due to ASR (see note
above).
• For products running at 1.5Gb/s:
Pass/Fail Criteria
o OOB-01a - Verification of no product COMINIT/COMRESET detection at 40mV
o OOB-01b - Verification of product COMINIT/COMRESET detection at 210mV
o If any of the above cases fails, this is considered a failure by the product.
• For products running at 3Gb/s:
o OOB-01c - Verification of no product COMINIT/COMRESET detection at 60mV
o OOB-01d - Verification of product COMINIT/COMRESET detection at 210mV
o If any of the above cases fails, this is considered a failure by the product.
2.17.2. OOB-02 : UI During OOB Signaling
2.17.2.1. Device/Host Expected Behavior
See section 7.2.2.7.2 of Serial ATA Revision 2.6.