Intel BX80569Q9550 - Core 2 Quad 2.83 GHz Processor, Datasheet

Page: 27 / 172

Intel
®
Itanium
®
Processor 9300 Series and 9500 Series Datasheet 27
Electrical Specifications
Note:
1. Measurement taken from single-ended waveform.
2. The given PLL parameters are: Underdamping (z) = 0.8 and natural frequency = fn = 7.86E6 Hz; wn = 2 *fn. N_minUI = 12
for Intel
®
QuickPath Interconnect 4.8 Gt/s channel.
3. Measurement taken from differential waveform.
4. Measured from -150 mV to +150 mV on the differential waveform (derived from SYSCLK minus SYSCLK_N). The signal must
be monotonic through the measurement region for rise and fall time. The 300 mV measurement window is centered on the
differential zero crossing. See Figure 2-4 .
5. Measured at crossing point where the instantaneous voltage value of the rising edge SYSCLK equals the falling edge
SYSCLK_N. See Figure 2-2 .
6. Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all
crossing points for this measurement. See Figure 2-3 .
7. Defined as the total variation of all crossing voltages of Rising SYSCLK and falling SYSCLK_N. This is the maximum allowed
variance in Vcross for any particular system. See Figure 2-2 .
8. Defined as the maximum instantaneous voltage including overshoot. See Figure 2-2 .
9. Defined as the minimum instantaneous voltage including undershoot. See Figure 2-2 .
10. T
Stable
is the time the differential clock must maintain a minimum ±150 mV differential voltage after rising/falling edges
before it is allowed to droop back into the VRB ±100 mV range. See Figure 2-5 .
T
Stable
Allowed time before ringback 500 ps 3, 10
T
REFCLK
-
JITTER
-
RMS
-
ONEPLL
Accumulated rms jitter over n UI of a
given PLL model output in response to
the jittery reference clock input. The
PLL output is generated by convolving
the measured reference clock phase
jitter with a given PLL transfer
function. Here n=12.
0.5 ps 2
Table 2-3. Intel ® QuickPath Interconnect/Intel ® Scalable Memory Interconnect
Reference Clock Specifications (Sheet 2 of 2)
Symbol Parameter Min Nom Max Units Notes
Figure 2-2. Single-ended Maximum and Minimum Levels and V
cross
Levels
Figure 2-3. V
cross-delta
Definition