CY28439

www.DataSheet4U.com 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 PCI1 PCI0 SRESE...