9LPRS480YKLFT Просмотр технического описания (PDF) - Integrated Device Technology

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9LPRS480YKLFT

Programmable System Clock Chip for ATI RS780 - K8™ based Systems

Integrated Device Technology 

Integrated

Circuit

Systems, Inc.

ICS9LPRS480

General Description

The ICS9LPRS480 is a main clock synthesizer chip that provides all clocks required for ATI RS7xx-based

systems.using AMD processors. An SMBus interface allows full control of the device.

Block Diagram

X1

X2 OSC

14 .3 1 8 M H z

Fixed PLL

100MHz

SS PLL

CPU/HTT, SRC,

ATIG

100MHz DIF/66MHz

200MHz

27MHz SS PLL

27MHz SS PLL

SS SB_SRC

PD#

SEL_27

SEL_SATA

SEL_HTT66

SMBCLK

SMBDAT

CLKREQ(5:0)#

Control

Logic

REF(2:0)

48MHz_(1:0)

SRC6/SATA

100MHz SRC(5:0)

100MHz ATIG(2:0)

HTT0/66MHz

CPUKG

SRC7T/27MHz_SS

SRC7C/27MHz_NS

SB_SRC(1:0)

Power Groups

VDD

63

4

16

35

40

26

48

55

56

Pin Number

VDDIO

GND

1

7

10,18

11,17

33

34

43

24

25

43

47

52

60

1391D—02/02/09

Description

USB_48 outputs

SRC/27MHz Outputs

SRC Logic Core

SRC differential outputs (IO's)

SB_SRC Core Logic

SB_SRC differential outputs (IO's)

SRC/SATA differential output

ATIG Core Logic

ATIG differential outputs (IO's)

CPUKG Core Logic

CPUKG differential outputs (IO's)

HTTCLK output

REF outputs

7

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