Intel BX80569Q9550 - Core 2 Quad 2.83 GHz Processor, Datasheet

Page: 35 / 172

Intel
®
Itanium
®
Processor 9300 Series and 9500 Series Datasheet 35
Electrical Specifications
Notes:
1. 1300 mVpp swing is recommended when CPU to CPU or CPU to IOH length is within 2” of PDG max trace
length. Note that default value is 1100 mVpp.
2. Measure AC CM noise at the TX and decimate to its spectral components. For all spectral components above
3.2 GHz, apply the attenuation of the channel at the appropriate frequency. If the resultant AC CM at the
receiver is met after taking out the appropriate spectral components meets the RX AC CM spec then we can
allow the transmitter AC CM noise to pass.
TX
clk-acc-jit-N_UI-1E-7
p-p accumulated jitter out of
transmitter over 0 <= n <= N UI
where N=12, measured with 1E-7
probability.
0 0.15 UI
TX
clk-acc-jit-N_UI-1E-9
p-p accumulated jitter out of
transmitter over 0 <= n <= N UI
where N=12, measured with 1E-9
probability.
0 0.17 UI
T
Tx-data-clk-skew-pin
Delay of any data lane relative to
clock lane, as measured at Tx
output
-0.5 0.5 UI
V
Rx-diff-pp-pin
Voltage eye opening at the end of
Tx+ channel for any data or clock
channel measured with a
cumulative probability of 1E-9
(UI).
225 1200 mV
T
Rx-diff-pp-pin
Timing eye opening at the end of
Tx+ channel for any data or clock
channel measured with a
cumulative probability of 1E-9 (UI)
0.63 1 UI
T
Rx-data-clk-skew-pin
Delay of any data lane relative to
the clock lane, as measured at the
end of Tx+ channel. This
parameter is a collective sum of
effects of data clock mismatches
in Tx and on the medium
connecting Tx and Rx.
-1 3 UI
V
Rx-CLK
Forward CLK Rx input voltage
sensitivity (differential pp)
180 mV
V
Rx-cm-dc-pin
DC common mode ranges at the
Rx input for any data or clock
channel
125 350 mV
V
Rx-cm-ac-pin
AC common mode ranges at the
Rx input for any data or clock
channel, defined as:
((V
D+
+ V
D-
/2 - V
RX-cm-dc-pin
)
-50 50 mV 2
Table 2-9. Intel ® Itanium ® Processor 9500 Series Transmitter and Receiver Parameter
Values for Intel ® QPI Channel at 4.8 GT/s (Sheet 2 of 2)
Symbol Parameter Min Nom Max Unit Notes
Table 2-10. Intel
®
Itanium
®
Processor 9500 Series Transmitter and Receiver Parameter
Values for Intel
®
QPI at 6.4 GT/s (Sheet 1 of 2)
Symbol Parameter Min Nom Max Unit Notes
V
Tx-diff-pp-pin
Transmitter differential swing 900 1400 mV 1
Z
TX_LOW_CM_DC
DC resistance of Tx terminations
at half the single ended swing
(which is usually 0.25*V
Tx-diff-pp-
pin
) bias point
37.4 50 Ω
Z
RX_LOW_CM_DC
DC resistance of Rx terminations
at half the single ended swing
(which is usually 0.25*V
Tx-diff-pp-
pin
) bias point
37.4 50 Ω
V
Tx-cm-dc-pin
Transmitter output DC common
mode, defined as average of V
D+
and V
D-
0.23 0.27 Fraction of
V
Tx-diff-pp-pin
4