The NCT6776F is a member of Nuvoton’s Super I/O product line. The NCT6776F monitors several critical parameters in PC hardware, including power supply voltages, fan speeds, and temperatures.
In terms of temperature monitoring, the NCT6776F adopts the Current Mode
(dual current source) and thermistor sensor approach. The NCT6776F also supports
the Smart Fan control system, including SMART FANTM I and SMART FANTM IV, which
makes the system more stable and user-friendly.
The NCT6776F supports four – 360K, 720K, 1.2M, 1.44M, or 2.88M – disk drive
types and data transfer rates of 250 Kb/s, 300 Kb/s, 500 Kb/s, 1 Mb/s, and 2
Mb/s. The disk drive adapter supports the functions of floppy disk drive
controller (compatible with the industry standard 82077/ 765), data separator,
write pre-compensation circuit, decode logic, data rate selection, clock
generator, drive interface control logic, and interrupt and DMA logic. Such a
wide range of functions integrated into one NCT6776F greatly reduce the number
of required components to interface with floppy disk drives.
The NCT6776F provides two high-speed serial communication port (UART), which
includes a 16-byte send/receive FIFO, a programmable baud rate generator,
complete modem-control capability, and a processor interrupt system. The UART
supports legacy speeds up to 115.2K bps as well as even higher baud rates of
230K, 460K, or 921K bps to support higher speed modems.
The NCT6776F supports the PC-compatible printer port (SPP), the
bi-directional printer port (BPP), the enhanced parallel port (EPP) and the
extended capabilities port (ECP). The NCT6776F supports keyboard and mouse
interface which is 8042-based keyboard controller.
The NCT6776F provides flexible I/O control functions through a set of general
purpose I/O (GPIO) ports. These GPIO ports may serve as simple I/O ports or may
be individually configured to provide alternative functions.
The NCT6776F supports the Intel® PECI (Platform Environment Control
Interface) and AMD® SB-TSI interface. The NCT6776F supports separated VID input
and output pins for Vcore voltage adjustment. It also supports AMD® CPU power on
sequence, and it also supports Intel® Deep Sleep Well glue logic to help
customers to reduce the external circuits needed while using Deep Sleep Well
The NCT6776F supports to decode port 80 diagnostic messages on the LPC bus.
This could help on system power on debugging. It also supports two-colour LED
control to indicate system power states. The NCT6776F supports Consumer IR
function for remote control purpose. It also supports Advanced Power Saving
function to further reduce the power consumption while the system is at S5
The configuration registers inside the NCT6776F support mode selection,
function enable and disable, and power-down selection. Furthermore, the
configurable PnP features are compatible with the plug-and-play feature in
Windows, making the allocation of the system resources more efficient than ever.