8170 N/B MAINTENANCE
5.1 Pentium 4(Willamette/Northwood)
Name | Type | Description |
VCCIOPLL | Input | VCCIOPLL provides isolated power for internal processor system |
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| bus PLLs. Follow he guidelines for VCCA, and refer to the Intel® |
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| Pentium® 4 Processor in the |
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| Chipset Platform Design Guide for complete implementation |
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| details. |
VCCSENSE | Output | VCCSENSE is an isolated low impedance connection to processor |
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| core power(VCC). It can be used to sense or measure power near |
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| the silicon with little noise. |
VCCVID | Input | There is no imput voltage requirement for VCCVID for designs |
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| intended tosupport only the Pentium 4 processor in the |
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| package. Refer to the Intel® Pentium® 4 Processor in the |
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| |
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| Guide for more information. |
VID[4:0] | Output | VID[4:0] (Voltage ID) pins can be used to support automatic |
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| selection of power supply voltages (Vcc). These pins are not |
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| signals, but are either an open circuit or a short circuit to VSS |
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| on the processor. The combination of opens and shorts |
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| defines the voltage required by the processor. The VID pins are |
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| needed to cleanly support processor voltage specification |
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| variations. See 1.4 for definitions of these pins. The power |
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| supply must supply the voltage that is requested by these pins, |
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| or disable itself. |
VSSA | Input | VSSA is the isolated ground for internal PLLs. |
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VSSSENSE | Output | VSSSENSE is an isolated low impedance connection to processor |
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| core VSS. It can be used to sense or measure ground near the |
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| silicon with little noise |
TMS | Input | TMS (Test Mode Select) is a JTAG specification support signal |
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| used by debug tools. |
TRDY# | Input | TRDY# (Target Ready) is asserted by the target to indicate that |
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| it is ready to receive a write or implicit writeback data transfer. |
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| TRDY# must connect the appropriate pins of all system bus |
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| agents. |
TRST# | Input | TRST# (Test Reset) resets the Test Access Port (TAP) logic. |
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| TRST# must be driven low during power on Reset. This can be |
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| done with a 680 . |
VCCA | Input | VCCA provides isolated power for the internal processor core |
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| PLLs. Refer to the Intel® Pentium® 4 Processor in the |
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| Package and Intel® 850 Chipset Platform Design Guide for |
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| complete implementation details. |
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