CY28349B Datasheet | Cypress

Features - patible 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# .. - MULTSEL0:1 PWR_DWN# PLL2 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# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 REF0/MULTSEL0- GND_REF VDD_CPU CPU_ITP CPU_ITP# GND_CPU PWR_DWN# CPU0 CPU0# VDD_CPU CPU1 CPU1# GND_CPU IREF VDD_CORE GND_CORE VDD_3V66 3V66_0 3V66_1 GND_3V66 3V66_2 3V66_3/48MHz_1 SCLK SDATA ~ SSOP-48 Note: 1. Signals marked with ‘- ’ and “^” have internal pull-up and pull-down resistors,...