CY28RS480 Clock Generator for ATI£ RS480 Chipset Features • Supports AMD£ CPU • 200 MHz differential CPU clock pairs • 100 MHz differential SRC clocks • 48 MHz USB clock • 33 MHz PCI clock • 66 MHz HyperTransport¥ clock CPU x2 SRC x8 HTT66 x1 PCI x1 REF x3 USB_48 x1 • I2C support with readback capabilities • Ideal Lexmark Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction • 3.
3V power supply • 56-pin SSOP and TSSOP packages Block Diagram XIN XOUT CPU_STP# CLKREQ[0:1]# Pin Configuration VDD_REF REF[0:2] XTAL OSC PLL1 PLL Ref Freq Divider Network VDD_CPU CPUT[0:1], CPUC[0:1], VDD_SRC SRCT[0:5],SRCC[0:5] VDD_SRCS SRCST[0:1],SRCSC[0:1] VDD_PCI PCI VDD_HTT HTT66...

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