CY28349B

CY28349B FTG for Intel® Pentium® 4 CPU and Chipsets Features Compatible to Intel® CK-Titan and CK-408 Clock Synthesizer/driver specifications System frequency synthesizer for Intel Brookdale 845 and Brookdale – G Pentium® 4 chipsets Programmable clock output frequency with less than 1-MHz increment Integrated fail-safe Watchdog timer for system recovery Automatically switch to hardware-selected or softwareprogrammed clock frequency when w timer time-out Fixed 3V66 and PCI output frequency mode. Capable of generating system RESET after a Watchdog timer time-out occurs or a change in output frequency via SMBus interface Support SMBus byte read/write and block read/ write operations to simplify system BIOS development Vendor ID and Revision ID support Programmable drive strength support Programmable output skew support Power management control inputs Available in 48-pin SSOP CPU x3 3V66 x4 PCI x 10 REF x2 48M x1 24_48M x1 Block Diagram X1 X2 Pin Configuration [1] VDD_REF REF0:1 XTAL OSC PLL 1 PLL Ref Freq Divider Network *FS0:4 VTT_PWRGD# www.DataSheet4U.com *MULTSEL0:1 PWR_DWN# PLL2 2 SDATA SCLK SMBus Logic *MULTSEL1/REF1 VDD_REF X1 X2 GND_PCI *FS2/PCI_F0 *FS3/PCI_F1 PCI_F2 VDD_PCI VDD_3V66 *FS4/PCI0 3V66_0:2 PCI1 PCI2 GND_PCI VDD_PCI PCI3 PCI_F0:2 PCI4 PCI0:6 PCI5 VDD_48MHz PCI6 3V66_3/48MHz_1 VDD_PCI VTT_PWRGD# VDD_48MHz 48MHz_0 RST# GND_48MHz *FS0/48MHz_0 24_48MHz *FS1/24_48MHz VDD_48MHz VDD_CPU CPU0:1, CPU0:1#, CPU_ITP, CPU_ITP# RST# ...