CY28439

www.DataSheet4U.com PRELIMINARY CY28439 Clock Generator for Intel Grantsdale Chipset Features Compliant to Intel CK410 Supports Intel Prescott and Tejas CPU Selectable CPU frequencies Differential CPU clock pairs 100-MHz differential SRC clocks (two selectable between Fixed and Overclocking) 96-MHz differential dot clock 48-MHz USB clocks 33-MHz PCI clock Dial-A-Frequency Watchdog Two independent overclocking PLLs Low-voltage frequency select input 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 CPU SRC x2 x6 PCI x9 REF DOT96 x2 x1 USB x1 24-48M x1 Block Diagram Xin Xout Pin Configuration VDD_RE F RE F 14.318MHz Crystal PLL Reference IREF VDD_CPU CPUT CPUC PLL1 CPU FS_[E:A] Divider VDD_SRC SRCT (PCI Ex) SRCC (PCI Ex) PLL2 SRC Divider VDD_SRC PLL3 SATA Divider SRCT4_SATA SRCC4_SATA VDD_48Mhz PLL4 Fixed Divider DOT96T DOT96C VDD_48 USB48 VDD_48 24/48 VDD_PCI PCI VDD_PCI PCIF VTTPWR_GD#/PD VSS_PCI PCI3 *FS_E/PCI4 PCI5 VSS_PCI VDD_PCI PCIF0 **FS_A/PCIF1 *FS_B/PCIF2 VDD_48 **SEL24_48#/24_48M USB48 VSS_48 DOT96T DOT96C VTTPWRGD#/PD SRCT0 SRCC0 VDD_SRC VSS_SRC SRCT1 SRCC1 SRCT2 SRCC2 VSS_SRC SRCT_SATAT SRCC_SATAC VDD_SRC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 VDD_PCI PCI2 P...