CY28378

CY28378 FTG for Pentium 4® and Intel® 845 Series Chipset Features Compatible with 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 HW selected or SW programmed clock frequency when Watchdog timer time-out Programmable 3V66 and PCI output frequency mode Capable of generating system RESET after a Watchdog timer time-out or a change in output frequency via SMBus interface occurs 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 Table 1. Frequency Table 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 VDD_CPU *MULTSEL1/REF1 CPUT[0:1], CPUC[0:1], VDD_REF CPU_ITP, CPU_ITP# *FS0:4 VTT_PWRGD# *MULTSEL0:1 PLL2 Fract. Aligner VDD_3V66 3V66_0:2 VDD_PCI PCI_F0:2 2 PCI0:6 VDD_48MHz 3V66_3/48MHz_1 VDD_48MHz 48MHz_0 PWRDWN# 24_48MHz 2 SDATA SCLK SMBus Logic X1 X2 GND_PCI *FS2/PCI_F0 *FS3/PCI_F1 PCI_F2 VDD_PCI *FS4/PCI0 PCI1 PCI2 GND_PCI PCI3 PCI4 PCI5 PCI6 VDD_PCI VTT_PWRGD# RESET# GND_48MHz *FS0/...