Recommended Application:
ALI 1644 style chipset
Output Features:
• 2 - CPU clocks (including 1 free running) @ 2.5V
• 13 - SDRAM @ 3.3V
• 7 - PCI (including 1 free running and 1 early selectable
free running) @ 3.3V
• 2 - AGP @ 3.3V
• 1 - IOAPIC 14.318MHz @ 2.5V
• 1 - 48MHz, @ 3.3V
• 1 - REF 14.318MHZ @ 3.3V, (selectable strength 1X or
2X) through I2C programming
Features:
• Programmable ouput frequency
• Programmable ouput rise/fall time
• Programmable CPU, SDRAM, PCI and AGP skew
• Real time system reset output
• Spread spectrum for EMI control typically
by 7dB to 8dB, with programmable spread percentage
• Watchdog timer technology to reset system
if over-clocking causes malfunction
• Uses external 14.318MHz crystal
Skew Specifications:
• CPU - CPU: <250ps
• PCI - PCI: <500ps
• SDRAM - SDRAM: <250ps
• AGP - AGP: <500ps
• PCI - AGP: <750ps
• CPU - SDRAM:<350ps
• CPU - PCI: <3ns