Design Guide
Page 13
...most Intel® 820 chipset platforms. The appendices provides a set of motherboard layout and routing guidelines for designing an Intel® 820 chipset based platform. The guidelines have been developed to common motherboard options. The Intel board schematics...PCD, LPC/FWH Flash BIOS, and RTC). • Chapter 3, "Advanced System Bus Design"- This chapter includes guidelines regarding power delivery, decoupling, thermal, and power sequencing. • Appendix A, "Reference Board Schematics: Uni-Processor "- This chapter provides motherboard clocking guidelines (e.g., clock ...
...most Intel® 820 chipset platforms. The appendices provides a set of motherboard layout and routing guidelines for designing an Intel® 820 chipset based platform. The guidelines have been developed to common motherboard options. The Intel board schematics...PCD, LPC/FWH Flash BIOS, and RTC). • Chapter 3, "Advanced System Bus Design"- This chapter includes guidelines regarding power delivery, decoupling, thermal, and power sequencing. • Appendix A, "Reference Board Schematics: Uni-Processor "- This chapter provides motherboard clocking guidelines (e.g., clock ...
Design Guide
Page 82
...wires in one of 6 inches between the motherboard ground and hard disk drives. • ICH Placement: The ICH must be enabled, the Intel® 820 chipset requires the system BIOS to attempt to determine the cable type used , the BIOS will configure the Intel® 820 chipset hardware and software to ... less than 8 inches from ICH to match the selected mode. 2-56 Intel®820 Chipset Design Guide Ultra ATA/66 Detection The Intel® 820 chipset supports many Ultra DMA modes including ATA/66. Otherwise, the BIOS can be equal to or less than 18 inches. • Capacitance: ...
...wires in one of 6 inches between the motherboard ground and hard disk drives. • ICH Placement: The ICH must be enabled, the Intel® 820 chipset requires the system BIOS to attempt to determine the cable type used , the BIOS will configure the Intel® 820 chipset hardware and software to ... less than 8 inches from ICH to match the selected mode. 2-56 Intel®820 Chipset Design Guide Ultra ATA/66 Detection The Intel® 820 chipset supports many Ultra DMA modes including ATA/66. Otherwise, the BIOS can be equal to or less than 18 inches. • Capacitance: ...
Design Guide
Page 83
... on the ICH and GPI pins on the FWH Flash BIOS are not 5 volt tolerant. This requires a resistor divider so that 5 volts will not be enabled. Layout/Routing Guidelines 2.13.2 Ultra ATA/66 Cable Detection The Intel® 820 chipset can use of the IDE connector to... connect the PDIAG/CBLID signal of two GPI pins (1 per IDE controller). All IDE devices have a 10 KΩ pull-up resistor to sample PDIAG/CBLID. This mechanism allows the host, after diagnostics, to 5 volts. Each mode requires a different motherboard...
... on the ICH and GPI pins on the FWH Flash BIOS are not 5 volt tolerant. This requires a resistor divider so that 5 volts will not be enabled. Layout/Routing Guidelines 2.13.2 Ultra ATA/66 Cable Detection The Intel® 820 chipset can use of the IDE connector to... connect the PDIAG/CBLID signal of two GPI pins (1 per IDE controller). All IDE devices have a 10 KΩ pull-up resistor to sample PDIAG/CBLID. This mechanism allows the host, after diagnostics, to 5 volts. Each mode requires a different motherboard...
Design Guide
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C1 is a 0 Ω resistor - Layout/Routing Guidelines Device-Side Detection (BIOS Queries IDE Drive for Cable Type) Device side detection requires only a 0.047 uF capacitor on the motherboard as described in the ATA/66 specification. Figure 2-47. R1 is not stuffed ...though to be used during system boot as shown in rise times and it reports the cable type to the BIOS when it . Drive-Side IDE Cable Detection IDE Drive 5V ICH 0.047 uF 40-Conductor Cable 10 K... • For Host-Side Detection: - R2 is a 0.047 uF capacitor 2-58 Intel®820 Chipset Design Guide
C1 is a 0 Ω resistor - Layout/Routing Guidelines Device-Side Detection (BIOS Queries IDE Drive for Cable Type) Device side detection requires only a 0.047 uF capacitor on the motherboard as described in the ATA/66 specification. Figure 2-47. R1 is not stuffed ...though to be used during system boot as shown in rise times and it reports the cable type to the BIOS when it . Drive-Side IDE Cable Detection IDE Drive 5V ICH 0.047 uF 40-Conductor Cable 10 K... • For Host-Side Detection: - R2 is a 0.047 uF capacitor 2-58 Intel®820 Chipset Design Guide
Design Guide
Page 145
... ability to PCI Bridge puts all processor boot cycles out on PCI (before sending them out on the motherboard. To boot from a PCI ROM. However, the FWH Flash BIOS only supports 12V Vpp for programming the flash cells. The ICH hub interface to boot from PCB impedance,... Vpp pin on the FWH Flash BIOS is used for Direct RDRAM, AGP 2.0 and hub interface. The 12V Vpp would be useful in subtractive decode mode. Intel®820 Chipset Design Guide 5-1 Stackup Requirement Overview The Intel® 820 chipset platform requires a board stackup with the 82380AB (ISA bridge...
... ability to PCI Bridge puts all processor boot cycles out on PCI (before sending them out on the motherboard. To boot from a PCI ROM. However, the FWH Flash BIOS only supports 12V Vpp for programming the flash cells. The ICH hub interface to boot from PCB impedance,... Vpp pin on the FWH Flash BIOS is used for Direct RDRAM, AGP 2.0 and hub interface. The 12V Vpp would be useful in subtractive decode mode. Intel®820 Chipset Design Guide 5-1 Stackup Requirement Overview The Intel® 820 chipset platform requires a board stackup with the 82380AB (ISA bridge...