Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...
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Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ... Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

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16.08.2012 Views

Signal Description 2.7 Clocks, Reset, and Miscellaneous Signal Name HCLKP HCLKN GCLKP GCLKN DREFCLKN DREFCLKP Type Description I HCSL I HCSL I HCSL RSTIN# I HVIN PWROK I HVIN EXTTS# I CMOS EXP_EN I CMOS EXP_SLR I CMOS ICH_SYNC# O HVCMOS XORTEST I/O GTL+ ALLZTEST I/O GTL+ Differential Host Clock In: These pins receive a differential host clock from the external clock synthesizer. This clock is used by all of the (G)MCH logic that is in the Host clock domain. Memory domain clocks are also derived from this source. Differential PCI Express* Clock In: These pins receive a differential 100 MHz Serial Reference clock from the external clock synthesizer. This clock is used to generate the clocks necessary for the support of PCI Express. Display PLL Differential Clock In Reset In: When asserted, this signal will asynchronously reset the (G)MCH logic. This signal is connected to the PCIRST# output of the Intel ® ICH7. All PCI Express graphics attach output signals will also tri-state compliant to PCI Express* Specification, Revision 1.0a. This input should have a Schmitt trigger to avoid spurious resets. This signal is required to be 3.3 V tolerant. Power OK: When asserted, PWROK is an indication to the (G)MCH that core power has been stable for at least 10 us. External Thermal Sensor Input: This signal may connect to a precision thermal sensor located on or near the DIMMs. If the system temperature reaches a dangerously high value, then this signal can be used to trigger the start of system thermal management. This signal is activated when an increase in temperature causes a voltage to cross some threshold in the sensor. PCI Express SDVO Concurrent Select 0 = Only SDVO or PCI Express operational 1 = SDVO and PCI Express operating simultaneously via PCI Express port NOTES: For the 82945GZ GMCH and 82945P/82945PL MCH, this signal should be pulled low. PCI Express* Static Lane Reversal/Form Factor Selection: (G)MCH’s PCI Express lane numbers are reversed to differentiate Balanced Technology Extended (BTX) or ATX form factors. 0 = (G)MCH’s PCI Express lane numbers are reversed (BTX Platforms) 1 = Normal operation (ATX Platforms) NOTES: This signal does not apply to the 82945GZ. ICH Sync: This signal is connected to the MCH_SYNCH# signal on the ICH7. XOR Test: This signal is used for Bed of Nails testing by OEMs to execute XOR Chain test. All Z Test: As an input this signal is used for Bed of Nails testing by OEMs to execute XOR Chain test. It is used as an output for XOR chain testing. 40 Intel ® 82945G/82945GZ/82945GC GMCH and 82945P/82945PL MCH Datasheet

2.8 Direct Media Interface (DMI) Signal Name Type Description DMI_RXP[3:0] DMI_RXN[3:0] DMI_TXP[3:0] DMI_TXN[3:0] I/O DMI O DMI Signal Description Direct Media Interface: These signals are receive differential pairs (Rx). Direct Media Interface: These signals are transmit differential pairs (Tx). 2.9 Intel ® Serial DVO (SDVO) Interface (Intel ® 82945G/82945GC/82945GZ GMCH Only) For the 82945G/82945GC GMCH, all but two of the pins in this section are multiplexed with the upper 8 lanes of the PCI Express interface. Signal Name Type Description SDVOB_CLK- O PCIE SDVOB_CLK+ O PCIE SDVOB_RED- O PCIE SDVOB_RED+ O PCIE SDVOB_GREEN- O PCIE SDVOB_GREEN+ O PCIE SDVOB_BLUE- O PCIE SDVOB_BLUE+ O PCIE SDVOC_RED- / SDVOB_ALPHA- SDVOC_RED+ / SDVOB_ALPHA+ O PCIE O PCIE SDVOC_GREEN- O PCIE SDVOC_GREEN+ O PCIE SDVOC_BLUE- O PCIE SDVOC_BLUE+ O PCIE Serial Digital Video Channel B Clock Complement. This signal is multiplexed with EXP_TXN12. Serial Digital Video Channel B Clock. This signal is multiplexed with EXP_TXP12. Serial Digital Video Channel C Red Complement. This signal is multiplexed with EXP_TXN15. Serial Digital Video Channel C Red. This signal is multiplexed with EXP_TXP15. Serial Digital Video Channel B Green Complement. This signal is multiplexed with EXP_TXN14. Serial Digital Video Channel B Green. This signal is multiplexed with EXP_TXP14. Serial Digital Video Channel B Blue Complement. This signal is multiplexed with EXP_TXN13. Serial Digital Video Channel B Blue. This signal is multiplexed with EXP_TXP13. Serial Digital Video Channel C Red Complement Channel B Alpha Complement. This signal is multiplexed with EXP_TXN11. Serial Digital Video Channel C Red Channel B Alpha. This signal is multiplexed with EXP_TXP11. Serial Digital Video Channel C Green Complement. This signal is multiplexed with EXP_TXN10. Serial Digital Video Channel C Green. This signal is multiplexed with EXP_TXP10. Serial Digital Video Channel C Blue Complement. This signal is multiplexed with EXP_TXN9. Serial Digital Video Channel C Blue. This signal is multiplexed with EXP_TXP9. Intel ® 82945G/82945G/82945GC GMCH and 82945P/82945PL MCH Datasheet 41

2.8 Direct Media Interface (DMI)<br />

Signal Name Type Description<br />

DMI_RXP[3:0]<br />

DMI_RXN[3:0]<br />

DMI_TXP[3:0]<br />

DMI_TXN[3:0]<br />

I/O<br />

DMI<br />

O<br />

DMI<br />

Signal Description<br />

Direct Media Interface: These signals are receive differential pairs (Rx).<br />

Direct Media Interface: These signals are transmit differential pairs (Tx).<br />

2.9 Intel ® Serial DVO (SDVO) Interface (Intel ®<br />

82<strong>945G</strong>/82<strong>945G</strong>C/82<strong>945G</strong>Z GMCH Only)<br />

For the 82<strong>945G</strong>/82<strong>945G</strong>C GMCH, all but two of the pins in this section are multiplexed with the<br />

upper 8 lanes of the PCI <strong>Express</strong> interface.<br />

Signal Name Type Description<br />

SDVOB_CLK- O<br />

PCIE<br />

SDVOB_CLK+ O<br />

PCIE<br />

SDVOB_RED- O<br />

PCIE<br />

SDVOB_RED+ O<br />

PCIE<br />

SDVOB_GREEN- O<br />

PCIE<br />

SDVOB_GREEN+ O<br />

PCIE<br />

SDVOB_BLUE- O<br />

PCIE<br />

SDVOB_BLUE+ O<br />

PCIE<br />

SDVOC_RED- /<br />

SDVOB_ALPHA-<br />

SDVOC_RED+ /<br />

SDVOB_ALPHA+<br />

O<br />

PCIE<br />

O<br />

PCIE<br />

SDVOC_GREEN- O<br />

PCIE<br />

SDVOC_GREEN+ O<br />

PCIE<br />

SDVOC_BLUE- O<br />

PCIE<br />

SDVOC_BLUE+ O<br />

PCIE<br />

Serial Digital Video Channel B Clock Complement. This signal is<br />

multiplexed with EXP_TXN12.<br />

Serial Digital Video Channel B Clock. This signal is multiplexed with<br />

EXP_TXP12.<br />

Serial Digital Video Channel C Red Complement. This signal is<br />

multiplexed with EXP_TXN15.<br />

Serial Digital Video Channel C Red. This signal is multiplexed with<br />

EXP_TXP15.<br />

Serial Digital Video Channel B Green Complement. This signal is<br />

multiplexed with EXP_TXN14.<br />

Serial Digital Video Channel B Green. This signal is multiplexed with<br />

EXP_TXP14.<br />

Serial Digital Video Channel B Blue Complement. This signal is<br />

multiplexed with EXP_TXN13.<br />

Serial Digital Video Channel B Blue. This signal is multiplexed with<br />

EXP_TXP13.<br />

Serial Digital Video Channel C Red Complement Channel B Alpha<br />

Complement. This signal is multiplexed with EXP_TXN11.<br />

Serial Digital Video Channel C Red Channel B Alpha. This signal is<br />

multiplexed with EXP_TXP11.<br />

Serial Digital Video Channel C Green Complement. This signal is<br />

multiplexed with EXP_TXN10.<br />

Serial Digital Video Channel C Green. This signal is multiplexed with<br />

EXP_TXP10.<br />

Serial Digital Video Channel C Blue Complement. This signal is<br />

multiplexed with EXP_TXN9.<br />

Serial Digital Video Channel C Blue. This signal is multiplexed with<br />

EXP_TXP9.<br />

Intel ® 82<strong>945G</strong>/82<strong>945G</strong>/82<strong>945G</strong>C GMCH and 82<strong>945P</strong>/82<strong>945P</strong>L MCH Datasheet 41

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