MITX-CORE-820 datasheet(63/104 Pages) EMERSON-NETWORKPOWER

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Chapter 5

MITX-CORE-820 Installation and Use (6806800M10D)

Firmware

5.1

Embedded Controller Overview

The embedded controller (EC) is an essential component in modern mobile, ultra-mobile and

embedded computer systems.

The Nuvoton keyboard controller and scanner firmware for the Nuvoton NPCE791x

keyboard/embedded controller is compatible with the industry standard 8042 interface and

can scan locally defined OEM keyboard matrix. It simultaneously supports a scanned keyboard,

external keyboards, and PS/2 mice. Options are also available for battery charging and

monitoring firmware. EC firmware is also fully functional in ACPI(SCI) or legacy environments.

In the MITX-CORE-820, the NPCE791C from Nuvoton was selected as the EC silicon. It provides

the power sequence controller, PS2 KB/MS interface, battery management,

thermal/temperature/fan speed control, serial port and LED controller.

The following diagram shows the system block of NPCE791x.

The NPCE791x is a highly integrated, embedded controller with an embedded RISC core and

system functions. It targets a wide range of portable applications that use the Low Pin Count

(LPC) interface and is designed to best meet the requirements of mobile systems.

Figure 5-1

NPCE791x System Block Diagram

MITX-CORE-820 Datasheet(PDF) 63 Page - Emerson Network Power