Integrated

Circuit

Systems, Inc.

ICS952301

Advance Information

0673—07/09/02

Block Diagram

Frequency Timing Generator for Transmeta Systems

Pin Configuration

Pentium is a trademark on Intel Corporation.

Power Groups

VDD_Core, GND_Core = PLL core

VDDREF, GNDREF = REF, X1, X2

VDDPCI, GNDPCI = PCICLK (6:0)

VDD48, GND48 = 48MHz (1:0)

28-Pin 173mil TSSOP

Note: ^ Internal Pulldown Resistor

* Internal Pullup Resistor

1 1X/2X Programmable

Recommended Application:

Transmeta

Output Features:

•

1CPU up to 66.6MHz &

overclocking of 66MHz.

•

7 PCI (3.3V) @ 33.3MHz (all are free running

selectable) w/ 2 selectable 1X/2X.

•

1 REF (3.3V) at 14.318MHz.

•

1 48MHz (3.3V).

•

1 24_48MHz selectable output.

Features:

•

Supports Spread Spectrum modulation for CPU and

PCI clocks, default -2.0% downspread.

•

Efficient Power management scheme through stop

clocks and power down modes.

•

Uses external 14.318MHz crystal, no external load

cap required for CL=18pF crystal.

•

28-pin TSSOP package, 4.40mm (173mil).

Skew Characteristics:

•

PCI – PCI < 500ps

•

CPU(early) – PCI = 1.5ns – 4ns.

GNDREF 1

28 VDDREF

X1 227 REF/ 1X or 2X Programmable

*

X2 3

26 CPU_STOP#

PD# 4

25 VDDCPU/CORE

PCICLK0 5

24 GNDCPU/CORE

PCICLK1 6

23 CPUCLK0

GNDPCI 7

22 PCI_STOP#

VDDPCI 8

21 SCLK

PCICLK2

PCICLK310

19GND48

PCICLK4

18 48MHz

GNDPCI 12

17 24-48MHz/Sel 48_24#

*

VDDPCI 13

16 SDATA

PCICLK514

15PCICLK6

SEL48_24#

XTAL

OSC

CPU

PLL

48MHz

PLL

Control

Logic

X1

X2

SDATA

SCLOCK

PD#

48MHz

REF

STOP

STOP

24/48

STOP

STOP

CPU_STOP#

24/48MHz

PCI_STOP#

CPU

PCI(6:0)

PCI DIV

ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.

ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.