Power Sequencing; Processor Core Power Signals - Intel BX80605X3430 - Xeon 2.4 GHz Processor Datasheet

Signal Description
6.10

Power Sequencing

Table 6-12. Power Sequencing
Signal Name
SKTOCC#
SM_DRAMPWROK
TAPPWRGOOD
VCCPWRGOOD_0
VCCPWRGOOD_1
VTTPWRGOOD
6.11

Processor Core Power Signals

Table 6-13. Processor Core Power Signals (Sheet 1 of 2)
Signal Name
ISENSE
VCC
VCC_NCTF
VCC_SENSE
Datasheet, Volume 1
Description
SKTOCC# (Socket Occupied): This signal will be pulled to
ground on the processor package. There is no connection
to the processor silicon for this signal. System board
designers may use this signal to determine if the
processor is present.
SM_DRAMPWROK processor input: This signal connects to
PCH DRAMPWROK.
Power good for ITP. Indicates to the ITP when the TAP can
be accessed.
VCCPWRGOOD_0 and VCCPWRGOOD_1 (Power Good)
Processor Input: The processor requires these signals to
be a clean indication that V , V
CC
are stable and within their specifications and that BCLK is
stable and has been running for a minimum number of
cycles. These signals must then transition monotonically
to a high state. These signals can be driven inactive at
any time, but BCLK and power must again be stable
before a subsequent rising edge of VCCPWRGOOD_0 and
VCCPWRGOOD_1. These signals should be tied together
and connected to the CPUPWRGD output signal of the
PCH.
The processor requires this input signal to be a clean
indication that the V power supply is stable and within
TT
specifications. 'Clean' implies that the signal will remain
low (capable of sinking leakage current), without glitches,
from the time that the power supplies are turned on until
they come within specification. The signal must then
transition monotonically to a high state. Note that it is not
valid for VTTPWRGOOD to be de-asserted while
VCCPWRGOOD_0 and VCCPWRGOOD_1 are asserted.
Description
Current sense from VRD11.1 Compliant Regulator to the
processor core.
Processor core power supply. The voltage supplied to
these pins is determined by the VID pins.
VCC/Non-Critical to Function: Pin for package
mechanical reliability.
VCC_SENSE and VSS_SENSE provide an isolated, low
impedance connection to the processor core voltage
and ground. They can be used to sense or measure
voltage near the silicon.
Direction
, V , V supplies
CCPLL TT AXG
Direction
Type
O
Asynch
I
CMOS
Asynch
O
CMOS
Asynch
I
CMOS
Asynch
I
CMOS
Type
I Analog
PWR
PWR
Analog
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