Intel ® P64H2 Power Requirements; Intel ® P64H2 Current Requirements; Intel ® P64H2 Decoupling Requirements - Intel Pentium M Processor Design Manual

® ®
Intel Pentium M Processor and Intel
Platform Power Delivery Guidelines
®
11.6 Intel
®
11.6.1 Intel
®
Table 92. Intel P64H2 Max Sustained Currents
1.8 V at 33 MHz PCI (both segments)
1.8 V at 66 MHz PCI/PCI-X (both segments)
1.8 V at 100 MHz PCI-X (both segments)
1.8 V at 133 MHz PCI-X (both segments)
3.3 V at 33 MHz PCI 6 loads (both segments)
3.3 V at 66 MHz PCI 2 loads (both segments)
3.3 V at 66 MHz PCI-X 4 loads (both segments)
3.3 V at 100 MHz PCI-X 2 loads (both segments)
3.3 V at 133 MHz PCI-X 1 load (both segments)
For more information, refer to the
®
11.6.2 Intel
®
The Intel
and logic low. This condition could cause the component voltage rails to drop below specified
limits. To avoid this, ensure that the appropriate amount of bulk capacitance is added in parallel to
the voltage input pins. It is recommended that the developer use the amount of decoupling
capacitors specified in the table below to ensure the component maintains stable supply voltages.
The capacitors should be placed as close to the package as possible.
Table 93. Decoupling Capacitor Recommendations
Power Plane/Pins
1.8 V Core (VCC)
1.8 V Hub Interface
2.0 (VCC_1.8)
3.3 V PCI/PCI-X
(VCC_3.3)
† In the case of the twenty 0.1 µF decoupling capacitors for the Vcc3.3V plane, it is recommended that at
least five of these capacitors be placed near the die on the back of the board between ground and the
VCC-PCI vias, as shown in
power resonance frequency at 66 Hz.
212
®
E7501 Chipset Platform
P64H2 Power Requirements
P64H2 Current Requirements
Voltage at PCI/PCI-X Interface
Intel
P64H2 Decoupling Requirements
P64H2 is capable of generating large current swings when switching between logic high
Number of
High-Frequency
Decoupling
Capacitors
8
2
†
20
6
Figure 146. This is not a strict requirement, but is recommended to reduce the
Max Sustained Current
®
82870P2 PCI/PCI-X 64-bit Hub 2 (P64H2) Thermal Design Guide
High-Frequency Number of Bulk
Capacitor Decoupling
Values Capacitors
0.1 µF 2
1.0 µF 1
0.1 µF 2
1.0 µF 1
1970 mA
2170 mA
2550 mA
2660 mA
930 mA
690 mA
1300 mA
1050 mA
770 mA
Bulk
Capacitor Values
®
4.7 µF (near Intel
100 µF (near regulator)
4.7 µF (near Intel P64H2)
100 µF (near regulator)
Design Guide
.
P64H2)