W137
FTG for Mobile 440BX & Transmeta’s Crusoe CPU
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
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#
0/1
0
1
OE
0
1
1
CPU
Hi-Z
66.6 MHz
100 MHz
PCI
Hi-Z
33.3
33.3
Spread%
Don’t Care
See
Table 2
See
Table 2
Key Specifications
Supply Voltages:........................................ V
DDQ3
= 3.3V±5%
V
DDQ2
= 2.5V±5%
CPU0:1 Output to Output Skew: ................................. 175 ps
Table 2. Spread Spectrum Feature
SPREAD#
0
1
Spread Profile
–0.5% (down spread)
0% (spread disabled)
Block Diagram
of the anchored frame as
<adjust the size
per requirement>
Pin Configuration
Rev 1.0, November 24, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555
Fax:(408) 855-0550
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