CY28404 Datasheet | Cypress

.. CK409-pliant Clock Synthesizer Features - Supports Intel Springdale/Prescott (CK409) - Selectable CPU frequencies - 3.3V power supply - Nine copies of PCI clock - Four copies 3V66 clock with optional VCH - Three copies 48-MHz clock - Three copies REF clock - Two differential CPU clock pairs - Support SMBus/I2C Byte, Word, and Block Read/Write - Dial-A-Frequency - Ideal Lexmark Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction - 48-pin SSOP package Table 1. Frequency Table CPU x2 3V66 x4 PCI x9 REF x3 48M x3 Block Diagram XIN XOUT Pin Configuration - - FS_A/REF_0 - - FS_B/REF_1 VDD_REF VDD_CPU XIN CPUT(0:1), CPUC(0:1) XOUT VSS_REF - FS_C/PCIF0 - FS_D/PCIF1 - FS_E/PCIF2 VDD_PCI VSS_PCI VDD_3V66 PCI0 3V66_(0:2) PCI1 PCI2 VDD_PCI PCI3 PCIF(0:2) VDD_PCI VSS_PCI PCI(0:5) PCI4 PCI5 RESET#/PD# 3V66_3/VCH - SEL24#/24_48MHz DOT_48 USB_48 VDD_48MHz VSS_48 DOT_48 USB_48 24_48MHz XTAL OSC PLL 1 PLL Ref Freq Divider Network VDD_REF REF(0:2) FS_(A:E) VTT_PWRGD#...