The Nuvoton W83627EHF is a Super I/O controller used in desktop PCs. It integrates a range of functions, including legacy I/O interfaces and hardware monitoring capabilities. By consolidating these functions into a single chip, it simplifies motherboard design and reduces overall system cost. This controller provides essential connectivity and monitoring features for PC systems.

Applications

• Desktop PCs
• Industrial PCs
• Embedded Systems
• Motherboard Integration

Features

• Floppy Disk Controller (FDC): Supports standard floppy disk drives with data transfer rates up to 1 Mbps.
• Parallel Port (LPT): Offers a multi-mode parallel port supporting SPP/EPP/ECP modes for printers and other parallel devices.
• Serial Ports (UARTs): Includes two high-speed UARTs with 16-byte FIFO buffers and support for various baud rates.
• Infrared (IrDA) Support: Supports IrDA 1.0 standard for wireless infrared communication.
• Keyboard Controller: Integrates a keyboard controller with PS/2 interface support.
• Mouse Interface: Supports PS/2 mouse devices.
• Hardware Monitoring: Monitors CPU temperature, system temperature, fan speeds, and voltages with programmable alarm thresholds.
• GPIO (General Purpose Input/Output) Pins: Offers a number of programmable GPIO pins for custom applications and external device control.
• ACPI Support: Supports Advanced Configuration and Power Interface (ACPI) for power management.

Benefits

• Reduced System Cost: Integrates multiple legacy I/O functions into a single chip, lowering component costs.
• Simplified Motherboard Design: Reduces the number of discrete components needed, simplifying PCB layout.
• Improved System Reliability: Combining functions into a single chip reduces potential failure points.
• Enhanced System Monitoring: Comprehensive hardware monitoring features allow for proactive system management and prevent damage from overheating or voltage irregularities.
• Legacy Device Support: Provides necessary interfaces for older peripherals, ensuring compatibility with existing hardware.
• Efficient Power Management: ACPI support enables optimized power consumption and efficient system wake-up.

Additional Details

The W83627EHF communicates with the system chipset via the LPC (Low Pin Count) bus. It features flexible interrupt routing and DMA channel assignments for various peripherals. The UARTs support hardware and software flow control. The hardware monitoring section includes programmable alarm thresholds for voltage, temperature, and fan speed, allowing the system to respond to potential issues. The chip typically comes in a PQFP (Plastic Quad Flat Package) or LQFP (Low Profile Quad Flat Package). The “EHF” suffix likely designates a particular feature set or manufacturing revision.