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 ...

intel
16.08.2012 Views

Functional Description 10.7 Power Management Power management feature List: 258 � ACPI 1.0b support 10.8 Clocking � ACPI S0, S1D, S3 (both Cold and Chipset Hot), S4, S5, C0, and C1. C2, C3, C4 states and corresponding Enhanced states- S3hot, C2, C3, and C4 are not used in the (G)MCH. � Enhanced power management state transitions for increasing time processor spends in low power states � Internal Graphics Display Device Control D0, D1, D2, D3 � Graphics Adapter States: D0, D3 � PCI Express Link States: L0, L0s (82945G/82945GC/82945P/82945PL Only) The (G)MCH has a total of 5 PLLs providing many times that many internal clocks. The PLLs are: � Host PLL – This PLL generates the main core clocks in the host clock domain. The Host PLL can also be used to generate memory and internal graphics core clocks. It uses the Host clock (HCLKIN) as a reference. � Memory PLL – This PLL can be used to generate memory and internal graphics core clocks, when not generated by the Host PLL. The memory PLL is not needed in all configurations, but exists to provide more flexible frequency combinations without an unreasonable VCO frequency. It uses the Host clock (HCLKIN) as a reference. � PCI Express PLL – This PLL generates all PCI Express related clocks, including the Direct Media Interface that connects to the ICH7. The PCI Express PLL uses the 100 MHz (GCLKIN) as a reference. � Display PLL A (82945G/82945GC/82945GZ GMCH Only) – This PLL generates the internal clocks for Display A. It uses DREFCLK as a reference. � Display PLL B (82945G/82945GC/82945GZ GMCH Only) – This PLL generates the internal clocks for Display B. It uses DREFCLK as a reference.

Figure 10-7 illustrates the various clocks in the 945G Express chipset platform. Figure 10-7. System Clocking Example CK410 56-Pin SSOP CPU_1 / CPU_1# CPU_0 / CPU_0# ITP_SRC7 / ITP_SRC7 # SRC_1 / SRC_1# SRC_2 / SRC_2# SRC_3 / SRC_3# SRC_5 / SRC_5# SRC_4 / SRC_4# SRC_6 / SRC_6# DOT_96 / DOT_96# USB_48 / USB_48# REF 0 PCIF_1 PCIF_2 PCI_5 PCI_4 PCI_3 PCI_2 PCI_1 PCI_0 Processor Diff Pair Processor Diff Pair Processor Diff Pair PCI Express DIff Pair PCI Express DIff Pair PCI Express DIff Pair PCI Express DIff Pair SATA Diff Pair DOT 96 MHz Diff Pair USB 48 MHz REF 14 MHz REF 14 MHz REF 33 MHz REF 14 MHz PCI 33 MHz 25 MHz Xtal PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI 33 MHz PCI Express GFX PCI Express Slot PCI Express LAN SIO LPC AC 97 LAN TPM LPC FWH LPC PCI Slot PCI Slot ITP x16 PCI Express* § Processor AC 97 Bit Clock LCI Bit Clock (G)MCH Intel ® High Definition Audio FSB Functional Description 24 MHz Slot 0 Slot 1 DMI Memory Intel ® ICH7 Slot 2 Slot 3 OSC 32.768 kHz Sys_Clocking 259

Figure 10-7 illustrates the various clocks in the <strong>945G</strong> <strong>Express</strong> chipset platform.<br />

Figure 10-7. System Clocking Example<br />

CK410<br />

56-Pin SSOP<br />

CPU_1 /<br />

CPU_1#<br />

CPU_0 /<br />

CPU_0#<br />

ITP_SRC7 /<br />

ITP_SRC7 #<br />

SRC_1 / SRC_1#<br />

SRC_2 / SRC_2#<br />

SRC_3 / SRC_3#<br />

SRC_5 / SRC_5#<br />

SRC_4 / SRC_4#<br />

SRC_6 / SRC_6#<br />

DOT_96 / DOT_96#<br />

USB_48 / USB_48#<br />

REF 0<br />

PCIF_1<br />

PCIF_2<br />

PCI_5<br />

PCI_4<br />

PCI_3<br />

PCI_2<br />

PCI_1<br />

PCI_0<br />

Processor Diff Pair<br />

Processor Diff Pair<br />

Processor Diff Pair<br />

PCI <strong>Express</strong><br />

DIff Pair<br />

PCI <strong>Express</strong><br />

DIff Pair<br />

PCI <strong>Express</strong> DIff Pair<br />

PCI <strong>Express</strong> DIff Pair<br />

SATA Diff Pair<br />

DOT 96 MHz Diff Pair<br />

USB 48 MHz<br />

REF 14 MHz<br />

REF 14 MHz<br />

REF 33 MHz<br />

REF 14 MHz<br />

PCI 33 MHz<br />

25 MHz Xtal<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI 33 MHz<br />

PCI <strong>Express</strong> GFX<br />

PCI <strong>Express</strong> Slot<br />

PCI <strong>Express</strong><br />

LAN<br />

SIO LPC<br />

AC 97<br />

LAN<br />

TPM LPC<br />

FWH LPC<br />

PCI Slot<br />

PCI Slot<br />

ITP<br />

x16 PCI <strong>Express</strong>*<br />

§<br />

Processor<br />

AC 97 Bit Clock<br />

LCI Bit Clock<br />

(G)MCH<br />

Intel ® High<br />

Definition Audio<br />

FSB<br />

Functional Description<br />

24 MHz<br />

Slot 0<br />

Slot 1<br />

DMI<br />

Memory<br />

Intel ® ICH7<br />

Slot 2<br />

Slot 3<br />

OSC<br />

32.768 kHz<br />

Sys_Clocking<br />

259

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