Overview

The W149 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 AGPset FTGs, the W149 adds a thirteen output buffer, supporting SDRAM DIMM modules in conjunction with the chipset.

Features

• Maximized EMI suppression using Cypress’s Spread Spectrum Technology

• Single chip system frequency synthesizer for Intel® 440BX AGPset

• Two copies of CPU output

• Six copies of PCI output

• 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 3 DIMMs

• Spread Spectrum feature always enabled

• SMBus interface for programming

• Power management control inputs

• Smooth CPU frequency switching from 66.8–124 MHz