Specifications

SATA-IO Confidential 49
2.12. Phy General Requirements
2.12.1. PHY-01 : Unit Interval
2.12.1.1. Device/Host Expected Behavior
See section 7.2.2.1.3 of Serial ATA Revision 2.6.
• See section 7.4.11 of Serial ATA Revision 2.6.
Measurement Requirements
• For products which support 3Gb/s, this requirement must be tested at both interface rates (1.5Gb/s and
3Gb/s).
• PHY-01a - Mean Unit Interval measured between 666.4333ps (min) to 670.2333ps (max) (for products
running at 1.5Gb/s)
Pass/Fail Criteria
• PHY-01b - Mean Unit Interval measured between 333.2167ps (min) to 335.1167ps (max) (for products
running at 3Gb/s)
• The values above shall be based on at least 100,000 UIs (covers at least one SSC profile)
2.12.2. PHY-02 : Frequency Long Term Stability
2.12.2.1. Device/Host Expected Behavior
This test is not applicable to products that support SSC.
See section 7.2.2.1.4 of Serial ATA Revision 2.6.
• See section 7.4.6 of Serial ATA Revision 2.6.
Measurement Requirements
• This test is only run once at the maximum interface rate of the product (1.5Gb/s or 3Gb/s).
• The execution of this test must include use of the low pass filter defined within section 7.4.11 of Serial ATA
Revision 2.6.
• f
tol
measured between -350ppm and 350ppm
Pass/Fail Criteria
2.12.3. PHY-03 : Spread-Spectrum Modulation Frequency
2.12.3.1. Device/Host Expected Behavior
See sections 7.2.2.1.5 and 7.3.3 of Serial ATA Revision 2.6.
This test requires support for Spread Spectrum Clocking (SSC), which is optional.
• See section 7.4.11 of Serial ATA Revision 2.6.
Measurement Requirements
• This test is only run once at the maximum interface rate of the product (1.5Gb/s or 3Gb/s).
• f
SSC
measured between 30kHz and 33kHz
Pass/Fail Criteria
• The value above shall be based on a mean of at least 10 complete SSC cycles