器件名称: W230-03
功能描述: Spread Spectrum FTG for VIA K7 Chipset
文件大小: 175.8KB 共15页
简 介:3
PRELIMINARY
W230-03
Spread Spectrum FTG for VIA K7 Chipset
Features
Maximized EMI Suppression using Cypress’s Spread Spectrum technology Single-chip system frequency synthesizer for VIA K7 chipset Two copies of CPU output Six copies of PCI output One 48-MHz output for USB One 24-MHz or 48-MHz output for SIO Two buffered reference outputs Thirteen SDRAM outputs provide support for 3 DIMMs Supports frequencies up to 200 MHz I2C interface for programming Power management control inputs Available in 48-pin SSOP Table 2. Pin Selectable Frequency Input Address CPU_CS CPUT0 FS3 FS2 FS1 FS0 (MHz) 1 1 1 1 100.0 1 1 1 0 100.0 1 1 0 1 100.0 1 1 0 0 95.0 1 0 1 1 133.3 1 0 1 0 133.3 1 0 0 1 133.3 1 0 0 0 102.0 0 1 1 1 104.0 0 1 1 0 106.0 0 1 0 1 107.0 0 1 0 0 108.0 0 0 1 1 109.0 0 0 1 0 110.0 0 0 0 1 111.0 0 0 0 0 112.0 PCI 0:5 (MHz) 33.3 33.3 33.3 31.7 33.3 33.3 33.3 34.0 34.6 35.3 35.6 36.0 36.3 36.6 37.0 37.3 Spread Spectrum –0.5% OFF ±0.5% OFF –0.5% OFF ±0.5% OFF OFF OFF OFF OFF OFF OFF OFF OFF
Key Specifications
CPU to CPU Output Skew: ......................................... 175 ps PCI to PCI Output Skew: ............................................ 500 ps VDDQ3: .................................................................... 3.3V±5% SDRAMIN to SDRAM0:12 Delay: ..........................3.7 ns typ. Table 1. Mode Input Table Mode Pin 2 0 CPU_STOP# 1 REF0
Block Diagram
VDDQ3 REF0/(CPU_STOP#) X1 X2 XTAL OSC
PLL Ref Freq
Pin Configuration[1]
REF1/FS0
I/O Pin C……
