W144中文资料440BX AGPset Spread Spectrum Frequency Synthesizer数据手册Silicon Labs规格书

描述 Description

Overview
The W144 was developed as a single-chip device to meet the clocking needs of the Intel 440BX AGPset. In addition to the typical outputs provided by standard 100-MHz 440BX FTGs, the W144 adds a thirteen output buffer, supporting SDRAM DIMM modules in conjunction with the chipset.
Cypress’s proprietary spread spectrum frequency synthesis technique is a feature of the CPU and PCI outputs. When enabled, this feature reduces the peak EMI measurements of not only the output signals and their harmonics, but also of any other clock signals that are properly synchronized to them.

特性 Features

• Maximized electromagnetic interference (EMI) suppression using Cypress’ Spread Spectrum technology
• Single chip system frequency synthesizer for Intel® 440BX AGPset
• Two copies of CPU output
• Six copies of PCI output 1
• One 48 MHz output for USB
• One 24 MHz output for SIO
• Two buffered reference outputs
• One IOAPIC output
• Thirteen SDRAM outputs provide support for three DIMMs
• Supports frequencies up to 150 MHz
• I2C interface for programming
• Power management control inputs