PI6C410B datasheet(2/15 Pages) PERICOM

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PI6C410B

Clock Generator for Intel PCI-Express Server Chipset

PS8811A

02/01/06

Pin Descriptions

Pin Name

Type

Pin No

Descriptions

REF[0:1]

Output

54, 55

3.3V 14.31818 MHz outputs

XTAL_IN

Input

14.31818 MHz crystal input

XTAL_OUT

Output

14.31818 MHz crystal output

CPU[0:3] & CPU[0:3]#

Output

36, 37; 39, 40; 42,

43; 45, 46

Differential CPU outputs

SRC[0:4] & SRC[0:4]#

Output

16, 17; 18, 19; 21, 22;

23, 24; 26, 27

Differential Serial Reference Clock outputs

PCIF[0:2]

Output

9, 10, 11

33 MHz clocks outputs (free running)

PCI[0:3]

Output

3, 4, 5, 6

33 MHz clocks outputs

USB_48

Output

48 MHz clock output

FS_A

Input

3.3V LVTTL inputs for CPU frequency selection

FS_B / TEST_MODE

Input

3.3V LVTTL inputs for CPU frequency selection / Test Mode

select: 0 = Hi-Z, 1 = Ref/N

FS_C / TEST_SEL

Input

3.3V LVTTL inputs for CPU frequency selection / Test Mode

select if pulled to 3.3V when Vtt_Pwrgd# is asserted LOW

IREF

Input

External resistor connection for internal current reference

VTT_PWRGD# /

PWRDWN

Input

3.3V LVTTL Level sensitive strobe used to determine to latch the

FS_A, FS_B/TEST_MODE and FS_C/TEST_SEL inputs (active

low) / 3.3V LVTTL active high input for Power Down operation.

SDA

I/O

SMBus compatible SDATA

SCL

Input

SMBus compatible SCLOCK

VDD_PCI

Power

1, 8

3.3V Power Supply for Outputs

VDD_48

Power

3.3V Power Supply for Outputs

VDD_SRC

Power

15, 25, 28

3.3V Power Supply for Outputs

VDD_CPU

Power

38, 44, 47

3.3V Power Supply for Outputs

VDD_REF

Power

3.3V Power Supply for Outputs

VSS_PCI

Ground

2, 7

Ground for Outputs

VSS_48

Ground

Ground for Outputs

VSS_SRC

Ground

Ground for Outputs

VSS_CPU

Ground

Ground for Outputs

VSS_REF

Ground

Ground for Outputs

VDD_A

Power

3.3V Power Supply for PLL

VSS_A

Ground

Ground for PLL

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