3

PS8734A

09/02/04

PI6C410

Clock Generator for Intel

PCI-Express Desktop Chipset

Functionality

Frequency Selection

FS_C

FS_B

FS_A

CPU

SRC

PCIF / PCI

REF

DOT_96

USB_48

Note

1

0

1

100MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

0

0

1

133MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

0

1

1

166MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

0

1

0

200MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

0

0

0

266MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

1

0

0

333MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

1

1

0

400MHz

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

1

1

1

Reserved

100MHz

33MHz

14.318MHz

96MHz

48MHz

1

Notes:

1. Refer to DC Electrical Characteristics for FS_A, FS_B and FS_C (Vih_FS, Vil_FS) threshold levels

Test Mode Selection

TEST_MODE

CPU

SRC

PCIF / PCI

REF

DOT_96

USB_48

Note

1

REF/N

REF/N

REF/N

REF

REF/N

REF/N

2

0

Hi-Z

Hi-Z

Hi-Z

Hi-Z

Hi-Z

Hi-Z

2

Notes:

2. Test mode will occur where the SMBus Bit 6 of Byte 6 = 1, or FS_C/TEST_SEL is set to logic high level.

PWRDWN Functionality

PWRDWN

CPU

CPU#

SRC

SRC#

PCIF /

PCI

REF

DOT_96 DOT_96# USB_48

0

Normal

Normal

Normal

Normal

33MHz 14.318MHz

Normal

Normal

48MHz

1

Iref × 2 or

Float

Float

Iref × 2 or

Float

Float

Low

Low

Iref × 2 or

Float

Float

Low