The VIA VT82C694T is a South Bridge chipset designed for use with VIA's North Bridge chipsets in PC systems. It handles various I/O functions, connecting slower peripherals to the system while the North Bridge manages high-speed data transfers between the CPU, memory, and graphics card.

Applications

• Desktop PCs
• Workstations

Features

• Integrated PCI IDE Controller: Supports Ultra DMA/33 and Ultra DMA/66 modes for faster hard drive performance.
• Integrated Super I/O Controller: Manages legacy I/O devices such as serial, parallel, and floppy disk drive ports.
• Integrated USB Controller: Provides USB 1.1 support for connecting USB peripherals.
• AC'97 Audio Controller: Enables audio output and input functionality.
• Power Management Support: Compliant with Advanced Power Management (APM) specifications for power saving.
• Real-Time Clock (RTC): Keeps track of system time and date.

Benefits

• Improved Hard Drive Performance: Ultra DMA/66 support allows for significantly faster data transfer rates compared to older IDE standards.
• Legacy Device Compatibility: Super I/O support ensures compatibility with older devices and peripherals.
• Peripheral Connectivity: USB support enables easy connection of a wide range of USB devices.
• Audio Functionality: The AC'97 controller provides standard audio output capabilities.
• Reduced Power Consumption: Power management features contribute to energy efficiency.

The VT82C694T interfaces with the North Bridge via the PCI bus. It was a popular South Bridge solution for PCs, providing a good balance of features, performance, and cost. Its integration of multiple I/O functions into a single chip helped to simplify motherboard design and reduce overall system cost. The Ultra DMA/66 support was a key feature, enabling faster hard drive performance and improving overall system responsiveness.