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Design Guide 61
Test Methodology 10
The signaling requirements of the SATA specification are measured for signal quality, Table 26
details the values from the SATA Specification, revision 1.0, 29 August 200, starting on page 76.
Table 26. Interface Timing and SI Requirements
Symbol Parameter Min Max Units
T,UI Operating data period 666.43 670.12 ps
t
rise
20% to 80% at transmitter 0.2 0.41 UI
t
fall
80% to 20% at transmitter 0.2 0.41 UI
V
cm,ac
Max sinusoidal amplitude of common mode signal
measured at receiver connector
100 mV
T
settle,CM
Maximum time for common-mode transients to settle to
within 10% of DC value during transitions to and from the
idle bus condition.
10 ns
V
diff,tx
+/- 250 mV differential nominal. Measured at Serial ATA
connector on transmit side
400 600 mV p-p
V
diff,rx
+/- 200 mV differential nominal. Measured at Serial ATA
connector on receive side
325 600 mV p-p
Tx
Zout
Tx differential output impedance as seen by a differential
TDR with 100 ps (max) edge looking into connector
(20%-80%)
85 115 Ohm
Rx
Zin
Rx differential input impedance as seen by a differential
TDR with 100 ps (max) edge looking into connector
(20%-80%)
85 115 Ohms
Tx
Skew
TX differential skew 20 ps