PCK2000

INTEGRATED CIRCUITS PCK2000 CK97 (66/100MHz) System Clock Generator Product specification 1998 Sep 29 Philips Semiconductors Philips Semiconductors Product specification CK97 (66/100MHz) System Clock Generator PCK2000 FEATURES Mixed 2.5V and 3.3V operation Four CPU clocks at 2.5V Eight synchronous PCI clocks at 3.3V, one free-running Two 2.5V IOAPIC clocks @ 14.318 MHz Two 3.3V 48MHz USB clock outputs Three 3.3V reference clocks @ 14.318 MHz Reference 14.31818 MHz Xtal oscillator input 100 MHz or 66 MHz operation Part provides frequencies for Pentium Pro and Pentium II™ motherboards PIN CONFIGURATION 1 2 3 4 5 6 7 8 48 47 46 45 44 43 42 41 40 39 REF0 REF1 VSSREF XTAL_IN XTAL_OUT VSSPCI0 PCICLK_F PCICLK1 VDDREF REF2 VDDAPIC IOAPIC0 IOAPIC1 VSSAPIC RESERVED VDDCPU0 CPUCLK0 CPUCLK1 VSSCPU0 VDDCPU1 CPUCLK2 CPUCLK3 VSSCPU1 VDDCORE1 VSSCORE1 PCISTOP CPUSTOP PWRDWN RESERVED SEL0 SEL1 SEL100/66 VDDPCI0 9 PCICLK2 10 PCICLK3 11 VSSPCI1 12 PCICLK4 13 PCICLK5 14 VDDPCI1 15 PCICLK6 16 PCICLK7 17 VSSPCI2 18 Power management control input pins 175 ps CPU clock jitter 175 ps skew on outputs 1.5 – 4 ns CPU–PCI delay Power down if PWRDWN is held LOW Available in 48-pin SSOP package See PCK2000M for 28-pin mobile version DESCRIPTION The PCK2000 is a clock synthesizer/driver chip for a Pentium Pro or other similar processors. The PCK2000 has four CPU clock outputs at 2.5V. There are eight PCI clock outputs running at 33MHz. One of the PCI clock output...