FTG for Mobile 440BX & Transmeta’s Crusoe CPU

W137

Rev 1.0, November 24, 2006

Page 1 of 8

2200 Laurelwood Road, Santa Clara, CA 95054

Tel:(408) 855-0555

Fax:(408) 855-0550

www.SpectraLinear.com

Features

• Maximized EMI suppression using Cypress’s Spread

Spectrum Technology

• Two copies of CPU output

• Six copies of PCI output (Synchronous w/CPU output)

• One 48-MHz output for USB support

• One selectable 24 /48 MHz output

• Two Buffered copies of 14.318 MHz input reference

signal

• Supports 100 MHz or 66 MHz CPU operation

• Power management control input pins

• Available in 28-pin SSOP (209 mils) and 28-pin TSSO

(173 mils)

• SS function can be disabled

• See W40S11-02 for 2 SDRAM DIMM support

Key Specifications

CPU0:1 Output to Output Skew: ................................. 175 ps

CPU0:1 Cycle to Cycle Jitter: ..................................... 200 ps

PCI_F, PCI1:5 Output to Output Skew:....................... 500 ps

PCI_F, PCI1:5 Cycle to Cycle Jitter: .......................... 250 ps

CPU to PCI Output Skew:................1.5–4.0 ns (CPU Leads)

Output Duty Cycle:..................................................... 45/55%

PCI_F, PCI Edge Rate: .............................................. >1 V/ns

CPU_STOP#,

OE,

SPREAD#,

SEL48#,

PCI_STOP#,

PWR_DWN# all have a 250-kW pull-up resistor.

Table 1. Pin Selectable Frequency

SEL100/66#

OE

CPU

PCI

Spread%

0/1

0

Hi-Z

Hi-Z

Don’t Care

0

1

66.6 MHz

33.3

1

1

100 MHz

33.3

Table 2. Spread Spectrum Feature

SPREAD#

Spread Profile

0

–0.5% (down spread)

1

0% (spread disabled)

<adjust the size of the anchored frame as

per requirement>

Block Diagram

Pin Configuration