Intel Xeon 7130N LF80550KF0878M 数据表
产品代码
LF80550KF0878M
Signal Definitions
Dual-Core Intel
®
Xeon
®
Processor 7000 Series Datasheet
65
§
V
CCA
I
V
CCA
provides isolated power for the analog portion of the internal PLL’s. Use a discrete RLC filter to
provide clean power. Refer to the appropriate platform design guide for complete implementation
details.
details.
V
CCIOPLL
I
V
CCIOPLL
provides isolated power for digital portion of the internal PLL’s. Follow the guidelines for
V
CCA
, and refer to the appropriate platform design guide for complete implementation details.
V
CCSENSE
V
SSSENSE
O
V
CCSENSE
and V
SSSENSE
provide isolated, low impedance connections to the processor core voltage
(V
CC
) and ground (V
SS
). They can be used to sense or measure voltage or ground near the silicon
with little noise.
VID[5:0]
O
VID[5:0] (Voltage ID) pins are used to support automatic selection of power supply voltages (V
CC
).
These are open drain signals that are driven by the processor and must be pulled through a resistor.
Conversely, the VR output must be disabled prior to the voltage supply for these pins becoming
invalid. The VID pins are needed to support processor voltage specification variations. See
Conversely, the VR output must be disabled prior to the voltage supply for these pins becoming
invalid. The VID pins are needed to support processor voltage specification variations. See
for definitions of these pins. The V
CC
VR must supply the voltage that is requested by these pins, or
disable itself.
VIDPWRGD
I
The processor requires this input to determine that the supply voltage for BSEL[1:0] and VID[5:0] is
stable and within specification.
stable and within specification.
V
SS
I
V
SS
is the ground plane for the Dual-Core Intel Xeon processor 7000 series.
V
SSA
I
V
SSA
provides an isolated, internal ground for internal PLL’s. Do not connect directly to ground. This
pin is to be connected to V
CCA
and V
CCIOPLL
through a discrete filter circuit.
V
TT
I
V
TT
is the FSB termination voltage.
VTTEN
O
VTTEN can be used as an output enable for the V
TT
regulator. VTTEN is used as an electrical key to
prevent processors with mechanically-equivalent pinouts from accidentally booting in a Dual-Core
Intel Xeon processor 7000 series platform. Since VTTEN is an open circuit on the processor
package, VTTEN must be pulled up on the motherboard. Refer to the appropriate platform design
guide for implementation details.
Intel Xeon processor 7000 series platform. Since VTTEN is an open circuit on the processor
package, VTTEN must be pulled up on the motherboard. Refer to the appropriate platform design
guide for implementation details.
Table 5-1. Signal Definitions (Sheet 7 of 7)
Name
Type
Description