The Nuvoton W83390G is a Super I/O chip designed for PC-based systems. It integrates a variety of input/output functions into a single chip, reducing the overall component count and simplifying system design. This chip is commonly used in desktop motherboards and embedded systems requiring a wide range of legacy I/O interfaces.

Applications

• Desktop motherboards
• Embedded systems
• Industrial PCs
• Point-of-Sale (POS) systems
• Legacy interface replacement

Features

• Floppy Disk Controller (FDC): Supports standard floppy disk drives.
• Serial Ports (UARTs): Provides multiple UARTs for serial communication.
• Parallel Port (LPT): Includes a parallel port for printer or other parallel device connectivity.
• Infrared (IrDA) Controller: Supports infrared communication.
• Keyboard Controller: Integrates a keyboard controller for PS/2 keyboard and mouse.
• Hardware Monitoring: Monitors system voltages, temperatures, and fan speeds.
• GPIO Pins: Offers a number of General Purpose Input/Output pins for custom applications.

Benefits

• Reduced Component Count: Integrates multiple I/O functions into a single chip.
• Simplified System Design: Eases motherboard or embedded system design.
• Cost Savings: Reduces the overall system cost.
• Legacy Interface Support: Provides essential legacy interfaces for compatibility with older devices.
• Enhanced System Monitoring: Enables monitoring of critical system parameters.

Additional Details

The W83390G Super I/O chip from Nuvoton typically interfaces with the LPC (Low Pin Count) bus of a PC chipset. It communicates with the system CPU and other peripherals through this bus. The chip includes internal registers that are programmed to configure the different I/O functions. The hardware monitoring section supports monitoring of voltages (e.g., Vcore, 3.3V, 5V, 12V), temperatures (e.g., CPU, system), and fan speeds. Alert thresholds can be set to trigger alarms when these parameters exceed predefined limits. The GPIO pins can be configured as either inputs or outputs, allowing for control of external devices or sensing external signals. Software drivers are generally required to enable and configure the various features of the W83390G. These drivers handle the low-level communication with the chip and provide an interface for application software to access the I/O functions. The operating temperature range is generally specified as 0°C to 70°C. The specific packaging may vary, but it is commonly available in a PQFP (Plastic Quad Flat Pack) package.