Intel 31154 manual Pull-Up/Pull-Down Terminations Sheet 2 of, Comments, Secondary PCI Signals

Models: 31154

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Pull-Up/Pull-Down Terminations (Sheet 2 of 9)

Terminations

 

 

 

Table 5.

Pull-Up/Pull-Down Terminations (Sheet 2 of 9)

 

 

 

 

Signal

 

Pull-Up/Pull-Down or Termination (See Note 1)

Comments

 

 

 

 

P_GNT#

 

Connect to GNT# of the primary PCI bus.

 

 

 

 

 

 

 

Connect to one of the AD lines of the primary PCI

Refer to Section 5.3, “IDSEL Lines” on page 30 for

P_IDSEL#

 

bus or to the IDSEL# signal of the PCI edge

 

more details.

 

 

connector (for add-in card applications).

 

 

 

 

 

 

 

P_M66EN

 

Connect to the M66EN signal of the primary PCI

 

 

bus of the PCI add-in card finger.

 

 

 

 

 

 

 

 

P_PAR

 

Connect to PAR of the primary PCI bus.

 

 

 

 

 

P_PAR64

 

Connect to PERR# of the primary PCI bus.

 

 

 

 

 

P_PERR#

 

Connect to PERR# of the primary PCI bus.

 

 

 

 

 

P_REQ#

 

Connect to one of the PCI bus request signals of

 

 

the primary PCI bus.

 

 

 

 

 

 

 

 

P_SERR#

 

Connect to SERR# of the primary PCI bus.

 

 

 

 

Secondary PCI Signals

 

 

 

 

 

S_AD[63:32]

 

Pull up to VCC33 through external 8.2 K

 

 

resistors.

 

 

 

 

 

 

 

 

S_CBE[7:4]#

 

Pull up to VCC33 through external 8.2 K

 

 

resistors.

 

 

 

 

 

 

 

 

S_REQ64#

 

Pull up to VCC33 through external 8.2 K

 

 

resistors.

 

 

 

 

 

 

 

 

S_ACK64#

 

Pull up to VCC33 through external 8.2 K

 

 

resistors.

 

 

 

 

 

 

 

 

S_FRAME#,

 

 

 

S_IRDY#,

 

 

 

S_TRDY#,

 

Pull up to VCC33 voltage through external 8.2 K

 

S_STOP#,

 

 

 

resistors.

 

S_DEVSEL#,

 

 

 

 

 

S_PERR#,

 

 

 

S_SERR#

 

 

 

 

 

 

 

S_REQ[8:1]#,

 

Pull up to VCC33 voltage through external 8.2 K

 

S_REQ0#/BR_GNT#,

Pull-up for both internal and external arbiter mode.

resistors.

S_GNT0#/BR_REQ#

 

 

 

 

 

 

Secondary GNT#

 

 

S_GNT1#,

 

 

 

S_GNT2#,

 

Connect to GNT# input of the PCI devices on the

 

S_GNT3#,

 

 

 

secondary PCI bus.

 

S_GNT4#,

 

 

 

 

 

S_GNT5#,

 

NC when not used.

 

S_GNT6#,

 

 

 

S_GNT7#,

 

 

 

S_GNT8#

 

 

 

 

 

 

 

NOTES:

1.The recommended value for pull-up resistors for PCI applications is 5.6 K(note that the minimum value for PCI 3.3 V signaling RMIN = 2.42 K, RTYP = 8.2 K, as per the PCI Local Bus Specification, Revision 2.3, section 4.3.3).

2.The recommended value for pull-up resistors for PCI-X applications is 8.2 K. For PCI-X, the minimum pull-up resistor value is 5 K, as per the PCI-X Addendum to the PCI Local Bus Specification, Revision 1.0b, section 9.7.

3.For plug-in card implementations, the pull-up must be on the motherboard.

4.Connect PVIO and SVIO pull-up resistors to 5 V or 3.3 V power supply through an external resistor—25 (5 V) or

0 (3.3 V), depending on the signaling level of the primary/secondary PCI bus. Refer to the power-sequencing guidelines in Section 8.2 on page 58.

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Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide

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Intel manual Pull-Up/Pull-Down Terminations Sheet 2 of, Intel 31154 133 MHz PCI Bridge Design Guide Design Guide, Signal