NCT6779D Nuvoton: Datasheet PDF, Features and Application

NCT6779D Overview

The NCT6779D belongs to Nuvoton's Super I/O product line and is designed to monitor critical parameters in PC hardware, such as power supply voltages, fan speeds, and temperatures. Regarding temperature monitoring, it utilizes a Current Mode (dual current source) and thermistor sensor approach. Additionally, the NCT6779D features support for the Smart Fan control system, including "SMART FANTM I and SMART FANTM IV, enhancing system stability and user-friendliness.

This chip provides two high-speed serial communication ports (UART) with features like a 16-byte send/receive FIFO, a programmable baud rate generator, full modem control, and a processor interrupt system. The UART supports legacy speeds up to 115.2K bps and even higher baud rates of 230K, 460K, or 921K bps for faster modem support.

Furthermore, the NCT6779D supports PC-compatible printer port (SPP), bi-directional printer port (BPP), enhanced parallel port (EPP), and extended capabilities port (ECP). It also supports a keyboard and mouse interface based on the 8042 keyboard controller.

Flexible I/O control functions are offered through a set of general-purpose I/O (GPIO) ports, which can function as standard I/O ports or be individually configured for alternative functions.

The NCT6779D supports industry standards like Intel® PECI (Platform Environment Control Interface) and AMD® SB-TSI interface. It assists with AMD® CPU power-on sequences and offers support for Intel® Deep Sleep Well glue logic, simplifying the external circuits required for Deep Sleep Well function.

This chip also assists in decoding port 80 diagnostic messages on the LPC bus, aiding in system power-on debugging. It includes support for two-color LED control to indicate system power states. Additionally, the NCT6779D supports Consumer IR functionality for remote control and Advanced Power Saving functions to reduce power consumption when the system is in the S5 state.

Inside the NCT6779D, configuration registers enable mode selection, function enable/disable, and power-down selection. The configurable Plug and Play (PnP) features are compatible with Windows' plug-and-play feature, enhancing system resource allocation efficiency.

NCT6779D Pin Layout

Pin Description

NCT6779D Specifications and Features

Specifications:

• Manufacturer: Nuvoton Technology Corporation
• Product Line: Super I/O (Input/Output) Controller
• Description：IC INTERFACE SPECIALIZED 128LQFP

Features:

Hardware Monitoring:

• Monitors critical parameters in PC hardware, including power supply voltages, fan speeds, and temperatures.
• Utilizes the Current Mode (dual current source) and thermistor sensor approach for temperature monitoring.

Smart Fan Control:

• Supports the Smart Fan control system, including "SMART FANTM I and SMART FANTM IV," enhancing system stability and user-friendliness.
• Enables adaptive fan speed control based on temperature and system load.

High-Speed Serial Communication Ports (UART):

• Provides two UART ports with features like a 16-byte send/receive FIFO.
• Includes a programmable baud rate generator, complete modem control capability, and a processor interrupt system.
• Supports legacy UART speeds up to 115.2K bps and higher baud rates of 230K, 460K, or 921K bps.

Parallel Port Support:

• Offers support for PC-compatible printer port (SPP), bi-directional printer port (BPP), enhanced parallel port (EPP), and extended capabilities port (ECP).

Keyboard and Mouse Interface:

• Supports keyboard and mouse interfaces based on the 8042 keyboard controller.

General-Purpose I/O (GPIO) Ports:

• Provides flexible I/O control functions through GPIO ports, which can be configured for various purposes.

Platform Compatibility:

• Supports Intel® PECI (Platform Environment Control Interface) and AMD® SB-TSI interface.

Power Sequencing:

• Supports AMD® CPU power-on sequence.
• Includes support for Intel® Deep Sleep Well glue logic to simplify external circuitry for Deep Sleep Well function.

Diagnostic and Indicator Support:

• Decodes port 80 diagnostic messages on the LPC bus, aiding in system power-on debugging.
• Supports two-color LED control to indicate system power states.

Consumer IR Function:

• Supports Consumer IR functionality for remote control purposes.

Advanced Power Saving:

• Includes Advanced Power Saving functions to reduce power consumption when the system is in the S5 state.

Configuration and Plug-and-Play:

• Configuration registers inside the NCT6779D support mode selection, function enable/disable, and power-down selection.
• Configurable PnP features are compatible with Windows plug-and-play, improving system resource allocation efficiency.

NCT6779D Block Diagram

NCT6779D Applications

The NCT6779D Super I/O controller chip by Nuvoton Technology Corporation finds applications in various hardware platforms and systems that require comprehensive hardware monitoring, control, and system management. Here are some common applications:

• Desktop Motherboards: The NCT6779D is frequently used in desktop computer motherboards to monitor and control critical hardware parameters. It ensures that the system operates within safe temperature ranges, maintains appropriate voltages, and manages fan speeds for efficient cooling.
• Server Motherboards: Server hardware often employs the NCT6779D to ensure the reliable and stable operation of critical components in data centers and server farms. It helps prevent overheating and hardware failures in server systems.
• Industrial Computers: Industrial PCs and embedded systems benefit from the NCT6779D's hardware monitoring and control capabilities. It ensures the industrial equipment operates reliably in harsh environmental conditions.
• Gaming Systems: Gaming desktops and consoles require efficient cooling to maintain optimal performance during intensive gaming sessions. The NCT6779D assists in monitoring and controlling fan speeds and temperatures in gaming systems.
• Workstations: Workstation computers used for demanding tasks such as content creation, 3D rendering, and scientific computing rely on the NCT6779D to manage hardware parameters and prevent overheating during extended usage.
• Embedded Systems: Various embedded systems, including those in automotive applications, medical devices, and industrial automation, use the NCT6779D to monitor and control hardware parameters, ensuring system reliability.
• Small Form Factor (SFF) PCs: Mini-ITX and other compact PCs benefit from the NCT6779D's compact design and efficient hardware monitoring, particularly in environments with limited space.
• HMI (Human-Machine Interface) Panels: In industrial automation and control systems, HMI panels often use the NCT6779D to monitor hardware health and temperature for operator safety and system stability.
• Custom Hardware Platforms: Manufacturers of custom hardware platforms can incorporate the NCT6779D into their designs to provide reliable hardware monitoring and control functions for their specific applications.
• System Debugging: The NCT6779D's diagnostic capabilities, such as decoding port 80 messages and system power state indicators, are useful for system debugging and diagnostics during the development and maintenance of hardware systems.

NCT6779D Application Circuit

NCT6779D Datasheet

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NCT6779D Manufacturer

The NCT6779D is manufactured by Nuvoton Technology Corporation. Nuvoton is a semiconductor company that specializes in the design and production of a wide range of integrated circuits and microcontroller-based solutions. They provide components and chips for various applications, including Super I/O controllers like the NCT6779D, which are commonly used in computer motherboards and other hardware platforms for hardware monitoring and control.

NCT6779D VS NCT6791D