2

PS8736C

12/19/05

PI6C410M/410MA

Clock Generator for Intel

PCI Express Mobile Chipset

Pin Description

Pin Name

Type

Pin Number

Descriptions

REF

Output

52

3.3V 14.31818 MHz output

XTAL_IN

Input

50

14.31818 MHz crystal input

XTAL_OUT

Output

49

14.31818 MHz crystal output

CPU[0:1] & CPU[0:1]#

Output

40, 41, 43, 44

Differential CPU outputs

SRC[0:6] & SRC[0:6]#

Output

17, 18, 19, 20,

22, 23, 24, 25,

26, 27, 30, 31,

32, 33

Differential Serial Reference Clock outputs

CPU2_ITP / SRC_7 &

CPU2_ITP# / SRC_7#

Output

35, 36

Selectable Differential CPU or SRC clock output

ITP_EN = 0 @ Vtt_Pwrgd# assertion = SRC

ITP_EN = 1 @ Vtt_Pwrgd# assertion = CPU

PCIF_0 / ITP_EN

Input /

Output

8

33 MHz clock output / CPU2 select when HIGH

PCIF_1

Output

9

33 MHz clocks outputs (free running)

PCI[2:5]

Output

3, 4, 5, 56

33 MHz clocks outputs

USB_48 / FS_A

Input /

Output

12

48 MHz clock output / 3.3V LVTTL inputs for CPU frequency selection

DOT_96 & DOT_96#

Output

14, 15

96 MHz differential clock output

PCI_STOP#

Input

55

3.3V LVTTL active low input for PCI Stop operation.

(150k-ohm internal pull-up resistor)

CPU_STOP#

Input

54

3.3V LVTTL active low input for CPU Stop operation.

(150k-ohm internal pull-up resistor)

FS_B / TEST_MODE

Input

16

3.3V LVTTL inputs for CPU frequency selection / Test Mode select: 0 =

Hi-Z, 1 = Ref/N

FS_C / TEST_SEL

Input

53

3.3V LVTTL inputs for CPU frequency selection / Test Mode select if

pulled to 3.3V when Vtt_Pwrgd# is asserted LOW

IREF

Input

39

External resistor connection for internal current reference

VTT_PWRGD# /

PWRDWN

Input

10

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

FS_B/TEST_MODE, FS_C/TEST_SEL and PCIF0/ITP_EN inputs (ac-

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

SDA

I/O

47

SMBus compatible SDATA

SCL

Input

46

SMBus compatible SCLOCK

VDD_PCI

Power

1, 7

3.3V Power Supply for Outputs

VDD_48

Power

11

3.3V Power Supply for Outputs

VDD_SRC

Power

21, 28, 34

3.3V Power Supply for Outputs

VDD_CPU

Power

42

3.3V Power Supply for Outputs

VDD_REF

Power

48

3.3V Power Supply for Outputs

VSS_PCI

Ground

2, 6

Ground for Outputs

VSS_48

Ground

13

Ground for Outputs

VSS_SRC

Ground

29

Ground for Outputs

VSS_CPU

Ground

45

Ground for Outputs

VSS_REF

Ground

51

Ground for Outputs

VDD_A

Power

37

3.3V Power Supply for PLL

VSS_A

Ground

38

Ground for PLL