器件名称: W311
功能描述: FTG for VIA Pro-266 DDR Chipset
文件大小: 347.08KB 共19页
简 介:1W311
W311
FTG for VIA Pro-266 DDR Chipset
Features
Maximized EMI Suppression using Cypress’s Spread Spectrum Technology System frequency synthesizer for VIA Pro-2000 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 Capable of generate 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 for CPU and PCI output clocks Programmable output skew between CPU, AGP and PCI Supports Intel Celeron and Pentium III class processor Three copies of CPU output Nine copies of PCI output One 48-MHz output for USB One 24-MHz or 48-MHz output for SIO Two buffered reference outputs Three copies of APIC output Supports frequencies up to 200 MHz SMBus interface for programming Power management control inputs Available in 48-pin SSOP Key Specifications CPU Cycle-to-Cycle Jitter:...........................................250 ps CPU to CPU Output Skew:..........................................175 ps PCI Cycle to Cycle Jitter:.............................................500 ps PCI to PCI Output Skew: .............................................500 ps
Block Diagram
V D D _R E F R EF 0 X1 X2 XTAL OSC
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