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

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Signal Description 2.4 DDR2 DRAM Reference and Compensation Signal Name Type Description SRCOMP[1:0] I/O System Memory RCOMP SOCOMP[1:0] I/O A SMVREF[1:0] I A DDR2 On-Die DRAM Over Current Detection (OCD) Driver Compensation SDRAM Reference Voltage: These signals are reference voltage inputs for each SDQ_x, SDM_x, SDQS_x, and SDQS_x# input signals. 2.5 PCI Express* Interface Signals (Intel ® 82945G/82945GC/82945P/82945PL Only) Unless otherwise specified, PCI Express signals are AC coupled, so the only voltage specified is a maximum 1.2 V differential swing. Note: PCI Express Interface signals are not on the 82945GZ. Signal Name Type Description EXP_RXN[15:0] EXP_RXP[15:0] EXP_TXN[15:0] EXP_TXP[15:0] I/O PCIE O PCIE EXP_COMPO I A EXP_COMPI I A PCI Express* Receive Differential Pair PCI Express* Transmit Differential Pair PCI Express* Output Current Compensation PCI Express* Input Current Compensation 38 Intel ® 82945G/82945GZ/82945GC GMCH and 82945P/82945PL MCH Datasheet
Signal Description 2.6 Analog Display Signals (Intel ® 82945G/82945GC/ 82945GZ GMCH Only) Signal Name Type Description RED O A RED# O A GREEN O A GREEN# O A BLUE O A BLUE# O A REFSET O A HSYNC O 2.5V CMOS VSYNC O 2.5V CMOS DDC_CLK I/O 2.5V CMOS DDC_DATA I/O 2.5V CMOS RED Analog Video Output: This signal is a CRT Analog video output from the internal color palette DAC. The DAC is designed for a 37.5 � routing impedance; however, the terminating resistor to ground will be 75 � (e.g., 75 � resistor on the board, in parallel with a 75 � CRT load). REDB Analog Output: This signal is an analog video output from the internal color palette DAC. It should be shorted to the ground plane. GREEN Analog Video Output: This signal is a CRT Analog video output from the internal color palette DAC. The DAC is designed for a 37.5 � routing impedance: however, the terminating resistor to ground will be 75 � (e.g., 75 � resistor on the board, in parallel with a 75 � CRT load). GREENB Analog Output: This signal is an analog video output from the internal color palette DAC. It should be shorted to the ground plane. BLUE Analog Video Output: This signal is a CRT Analog video output from the internal color palette DAC. The DAC is designed for a 37.5 � routing impedance; however, the terminating resistor to ground will be 75 � (e.g., 75 � resistor on the board, in parallel with a 75 � CRT load). BLUEB Analog Output: This signal is an analog video output from the internal color palette DAC. It should be shorted to the ground plane. Resistor Set: Set point resistor for the internal color palette DAC. A 255 � 1% resistor is required between REFSET and motherboard ground. CRT Horizontal Synchronization: This signal is used as the horizontal sync (polarity is programmable) or “sync interval”. 2.5 V output CRT Vertical Synchronization: This signal is used as the vertical sync (polarity is programmable). 2.5 V output. Monitor Control Clock. This signal may be used as the DDC_CLK for a secondary multiplexed digital display connector. Monitor Control Data. This signal may be used as the DDC_Data for a secondary multiplexed digital display connector. Intel ® 82945G/82945G/82945GC GMCH and 82945P/82945PL MCH Datasheet 39
Page 1 and 2: Intel ® 945G/945GZ/945GC/ 945P/945
Page 3 and 4: Contents 1 Introduction ...........
Page 5 and 6: 4.2.11 C0DRC1—Channel A DRAM Cont
Page 7 and 8: 6.1.16 DMICESTS—DMI Correctable E
Page 9 and 10: 9.4.5 SMM Space Decode and Transact
Page 11 and 12: 11.3 DC Characteristics ...........
Page 13 and 14: Revision History Rev Description Da
Page 15 and 16: Intel ® 82945G/82945GZ/82945GC/829
Page 17 and 18: 1 Introduction Introduction The Int
Page 19 and 20: Figure 1-2. Intel ® 945GZ/82945GC
Page 21 and 22: 1.1 Terminology Term Description Ac
Page 23 and 24: Term Description TOLM Top Of Low Me
Page 25 and 26: Introduction � Supports four bank
Page 27 and 28: Introduction 1.4 Graphics (Intel ®
Page 29 and 30: 1.5 Analog and SDVO Displays (Intel
Page 31 and 32: 2 Signal Description Signal Descrip
Page 33 and 34: 2.1 Host Interface Signals Signal D
Page 35 and 36: Signal Name Type Description HREQ[4
Page 37: 2.3 DDR2 DRAM Channel B Interface S
Page 41 and 42: 2.8 Direct Media Interface (DMI) Si
Page 43 and 44: 2.10 Power and Ground Name Voltage
Page 45 and 46: Interface Signal Name I/O System Me
Page 47 and 48: Interface Signal Name I/O State Dur
Page 49 and 50: 3 Register Description Register Des
Page 51 and 52: Register Description Note: A physic
Page 53 and 54: 3.3 Configuration Mechanisms Regist
Page 55 and 56: 3.4 Routing Configuration Accesses
Page 57 and 58: 3.4.2.2 DMI Configuration Accesses
Page 59 and 60: Bit Access & Default 10:8 R/W 000b
Page 61 and 62: Host Bridge/DRAM Controller Registe
Page 63 and 64: 4.1 Device 0 Configuration Register
Page 65 and 66: 4.1.4 PCISTS—PCI Status (D0:F0) P
Page 67 and 68: 4.1.7 MLT—Master Latency Timer (D
Page 69 and 70: 4.1.12 EPBAR—Egress Port Base Add
Page 77 and 78: 4.1.19 PAM1—Programmable Attribut
Page 83 and 84: 4.1.25 LAC—Legacy Access Control
Page 87 and 88: 4.1.29 ERRSTS—Error Status (D0:F0
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4.1.31 SKPD—Scratchpad Data (D0:F
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Host Bridge/DRAM Controller Registe
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4.2.7 C0DCLKDIS—Channel A DRAM Cl
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4.2.9 C0DRT1—Channel A DRAM Timin
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Bit Access & Default 6:4 R/W 000b 3
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4.2.24 PMSTS—Power Management Sta
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4.3.1 EPESD—EP Element Self Descr
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4.3.3 EPLE1A—EP Link Entry 1 Addr
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Host-PCI Express* Bridge Registers
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Address Offset Host-PCI Express* Br
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5.1.3 PCICMD1—PCI Command (D1:F0)
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5.1.4 PCISTS1—PCI Status (D1:F0)
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5.1.7 CL1—Cache Line Size (D1:F0)
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5.1.12 IOBASE1—I/O Base Address (
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5.1.15 MBASE1—Memory Base Address
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5.1.20 INTRLINE1—Interrupt Line (
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Bit Access & Default 2 R/W 0b 1 R/W
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5.1.29 MA—Message Address (D1:F0)
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5.1.33 DCAP—Device Capabilities (
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5.1.35 DSTS—Device Status (D1:F0)
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5.1.37 LCTL—Link Control (D1:F0)
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5.1.39 SLOTCAP—Slot Capabilities
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5.1.41 SLOTSTS—Slot Status (D1:F0
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5.1.43 RSTS—Root Status (D1:F0) P
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5.1.56 ESD—Element Self Descripti
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5.1.61 CESTS—Correctable Error St
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Direct Media Interface (DMI) RCRB 6
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6.1.3 DMIPVCCAP2—DMI Port VC Capa
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6.1.6 DMIVC0RCTL—DMI VC0 Resource
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6.1.9 DMIVC1RCTL—DMI VC1 Resource
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6.1.13 DMILSTS—DMI Link Status MM
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6.1.15 DMIUEMSK—DMI Uncorrectable
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Integrated Graphics Device (D2:F0)
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7.1.4 PCISTS2—PCI Status (D2:F0)
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7.1.7 CLS—Cache Line Size (D2:F0)
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7.1.11 IOBAR—I/O Base Address (D2
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7.1.20 MINGNT—Minimum Grant (D2:F
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8.1.3 PCICMD2—PCI Command (D2:F1)
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8.1.5 RID2—Revision Identificatio
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8.2 Device 2 - PCI I/O Registers In
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9 System Address Map System Address
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Figure 9-1. System Address Ranges 4
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Compatible SMRAM Address Range (A_0
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9.2 Main Memory Address Range (1 MB
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9.3 PCI Memory Address Range (TOLUD
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9.3.6 PCI Express* Graphics Attach
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9.4.1 SMM Space Definition System A
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9.4.5 SMM Space Decode and Transact
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9.4.12 Legacy VGA and I/O Range Dec
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10 Functional Description This chap
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Interleaved Mode Functional Descrip
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667 MHz (PC 5300) (82945G/82945GC/8
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10.2.2.2 System Memory Supported Co
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Functional Description Table 10-5.
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10.3 PCI Express* (Intel ® 82945G/
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Figure 10-2. SDVO Conceptual Block
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Figure 10-3. Concurrent SDVO / PCI
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10.5 Integrated Graphics Device (In
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10.5.3 4X Faster Setup Engine Funct
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10.5.4 Texture Engine Functional De
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10.5.4.8 Pixel Shader Functional De
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Functional Description to determine
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10.5.6 2D Engine Functional Descrip
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10.5.8.1 Cursor Plane Functional De
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Functional Description device is in
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10.6.2 Digital Display Interface Fu
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10.6.2.1.5 Control Bus Functional D
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Figure 10-7 illustrates the various
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11 Electrical Characteristics Elect
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11.1.1 Power Characteristics Table
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Signal Group Electrical Characteris
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11.3 DC Characteristics Table 11-5.
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Symbol Signal Group Electrical Char
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Ballout and Package Information 12
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Ballout and Package Information Fig
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12.2 Ballout Table Ballout and Pack
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Ballout and Package Information EXP
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Ballout and Package Information HA2
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Ballout and Package Information HD6
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Ballout and Package Information RSV
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Ballout and Package Information SDM
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Ballout and Package Information SDQ
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Ballout and Package Information SDQ
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Ballout and Package Information VCC
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Ballout and Package Information VSS
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12.3 Package § Ballout and Package
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Ballout and Package Information Int
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13.2 XOR Test Mode Initialization T
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13.4 XOR Chains Testability Table 1
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Table 13-5. XOR Chain 2 Pin Count B
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Table 13-8. XOR Chain 5 Pin Count B
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Table 13-11. XOR Chain 8 Pin Count
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Intel® 945G/945GZ/945GC/ 945P/945PL Express Chipset Family ...

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