SB710 datasheet(21/88 Pages) AMD

21 / 88 page

45215

Rev. 1.60 November 09

AMD SB710 Databook

SB710 Strap Information

Pad Name

Strap Name

Type

Description

PCI_AD27

PCI_PLL

Bypass PCI PLL

0 V – Bypass internal PLL clock .

Use REQ3# as A-Link bypass clock

Use GNT3# as B-Link bypass clock

3.3 V – Use internal PLL-generated PLL

CLK (Default)

(Internal PU of 15 k

)

PCI_AD26

ACPI_BCLK

Bypass ACPI_BCLK

0 V – Bypass internal generated acpi_bclk.

GNT0# as acpi_bclk bypass clock.

3.3 V – Use internal generated acpi_bclk (Default)

(Internal PU of 15 k

)

PCI_AD25

IDE_PLL

Bypass IDE CLK

0 V – Bypass internal Ide Clk

Use GNT2# as Ide 66-MHz bypass clock.

Use REQ2# as Ide 50-MHz bypass clock.

Use REQ1# as Ide 33-MHz bypass clock.

3.3 V – Use internal PLL Ide Clk (Default)

(Internal PU of 15 k

).

PCI_AD24

PCIE_EEPROM

A-Link Express-II core strap from I2C ROM enable

0 V – Use EEPROM PCI-E straps, getting the value

from I2C EPROM.

I2C EPROM ADDRESS set to all zeroes.

Use GNT4# as SDA

Use REQ4# as SCL.

3.3 V – Use default PCI-E straps (Default)

(Internal PU of 15 k

)

PCI_AD23

Reserved

—

Reserved (Internal PU of 15 k

)

Table 4-3: Additional Straps

The following strap is not captured by the straps logic, but is required to make the internal RTC work

properly.

Pad Name

Strap Name

Description

RTCCLK

—

The pin should be pulled-up to S5_3.3V and a crystal should be put

on X1/X2 to enable the internal RTC. Otherwise, the internal RTC

may not function properly

SB710 Datasheet(PDF) 21 Page - Advanced Micro Devices

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