Intel 815 Manual do Utilizador Página 161

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System Design Checklist
R
Intel
®
815 Chipset Platform Design Guide 161
13.4 ICH Checklist
13.4.1 PCI Checklist
Checklist Items Recommendations
AD[31:0] AD16,17 pass through 100 resistor.
ACK 64#
REQ 64#
(5V PCI environment) 2.7 k (approximate) pull-up resistors to VCC5.
(3V PCI environment) 8.2 k (approximate) pull-up resistors to VCC3_3.
Each REQ 64# and ACK 64# requires it’s own pull-up.
PTCK Pull-down through 5.6 k to GND
Connect to PCI Connectors only.
PTDI, PTRST#, PTMS Pull-up through 5.6 k resistor to VCC5
Connect to PCI Connectors only.
PRSNT#21, PRSNT#22,
PRSNT#31, PRSNT#32
Decoupled with 0.1 µF capacitor to GND
PIRQ#C, PIRQ#D,
U2_ACK64#,
U2_REQ64#,
U3_ACK64#,
U3_REQ64#, PREQ#1,
PLOCK#1, STOP#,
TRDY#, SERR#, PREQ#3,
PIRQ#A, PERR#,
PREQ#0, PREQ#2
DEVSEL#, FRAME#,
IRDY#
Pull-up through 2.7 k resistor to VCC5
PCIRST# Pull signal down through 0.1 µF capacitor when input for USB. Input to
buffer for PCIRST_BUF#.
PCPCI_REQ#A,
REQ#B/GPIO1,
GNT#B/GPIO17, PGNT#0,
PGNT#1, PGNT#2,
PGNT#3
Pull-up through 8.2 k resistor to VCC3_3
PCLK_3 Signal coming from Intel
®
CK-815 device pass through a 33 resistor to
PCI connector.
PCIRST_BUF# Signal comes from buffered PCIRST#
Pull-up through 8.2 k resistor to VCC3_3
Passes through 33 resistor
SDONEP2, SDONEP3,
SBOP2, SBOP3
Pull-up through 5.6 k resistor to VCC5
R_RSTP#, R_RSTS# Signal is from PCIRST_BUF# and passes through a 33 resistor
IDSEL lines to PCI
connectors
100 series resistor.
3V_AUX Optional to 3VSB, but required if PCI devices supporting wake up events.
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