Crystal Semiconductor

• Full DOS games compatibility via PC/PCI, DDMA, and CrystalClear? Legacy Support
• PCI version 2.1 bus master
• PC 98 and PC 99 compliant
• MPU-401 interface, FM synthesizer, and game port
• Full duplex operation
• Hardware volume control
• Windows 95®, Windows 98® (WDM), Windows NT® 4.0, Windows NT 5.0 (WDM) drivers
• Pin-compatible upgrade path to CS4614, CS4622, and CS4624 with common software stack
• Advanced power management (PPMI)
• Asynchronous digital serial interface (ZV Port)

The CS4280 is a PCI audio controller with integrated legacy games support suitable for desktop and notebook PC designs. When combined with driver software and an AC '97 codec such as the CS4297, this device provides a complete high quality audio solution. Legacy compatibility is achieved via PC-PCI, DDMA, and CrystalClear Legacy Support. The product includes an integrated FM synthesizer and Plug-and-Play interface. In addition, the CS4280 offers hardware volume control and power management features. WDM drivers provide support for Windows 98 and Windows NT. When used with the CS4297, the CS4280 is fully compliant with Microsoft PC 98 audio requirements. In the 100-pin MQFP package, the CS4280 is pin-compatible with the CS4614, and the 128-pin TQFP package is a pin compatible subset of the CS4622/24.