Intel Xeon 7130N LF80550KF0878M Scheda Tecnica
Codici prodotto
LF80550KF0878M
Electrical Specifications
Dual-Core Intel
®
Xeon
®
Processor 7000 Series Datasheet
17
2.1.3
Phase Lock Loop (PLL) Power and Filter
V
CCA
, V
CCIOPLL
are power sources required by the PLL clock generators on the Dual-Core
Intel Xeon processor 7000 series. These are analog PLLs and they require low noise power
supplies for minimum jitter. These supplies must be low pass filtered from V
supplies for minimum jitter. These supplies must be low pass filtered from V
TT
.
The AC low-pass requirements, with input at V
TT
, are as follows:
•
< 0.2 dB gain in pass band
•
< 0.5 dB attenuation in pass band < 1 Hz
•
> 34 dB attenuation from 1 MHz to 66 MHz
•
> 28 dB attenuation from 66 MHz to core frequency
. For recommendations on implementing the
filter, refer to the appropriate platform design guide.
NOTES:
1. Diagram not to scale.
2. No specification for frequencies beyond f
2. No specification for frequencies beyond f
core
(core frequency).
3. f
peak
, if existent, should be less than 0.05 MHz.
4. f
core
represents the maximum care frequency supported by the platform.
2.2
Voltage Identification (VID)
The VID[5:0] pins supply the encodings that determine the voltage to be supplied by the V
CC
(the
core voltage for the Dual-Core Intel Xeon processor 7000 series) voltage regulator. The VID
specification for the Dual-Core Intel Xeon processor 7000 series is defined by the Vcc Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.2 Design
Guidelines. The voltage set by the VID pins is the maximum V
specification for the Dual-Core Intel Xeon processor 7000 series is defined by the Vcc Voltage
Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.2 Design
Guidelines. The voltage set by the VID pins is the maximum V
CC
voltage allowed by the
Figure 2-2. Phase Lock Loop (PLL) Filter Requirements
0 dB
-28 dB
-34 dB
0.2 dB
forbidden
zone
-0.5 dB
forbidden
zone
1 MHz
66 MHz
fcore
fpeak
1 Hz
DC
passband
high frequency
band