MITX-CORE-820 datasheet(83/104 Pages) EMERSON-NETWORKPOWER

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Firmware

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

5.3.8

PS2 Interface & Device Configuration

NPCE791x provides three PS/2 channels including channel 1, channel 2 and channel 3. For the

MITX-CORE-820, the channel 3 is for PS2 mouse, the channel 2 is for PS2 keyboard and the

channel 1 is not used.

5.3.9

Input Events Detection through GPIO

EC detects the following events:



Power Switch



AC adaptor In/Out



Battery In/Out Event

The power switch and AC adaptor In/Out could be detected through the event table below.

However, the MITX-CORE-820 does not have a GPIO pin for the battery in/out detection. EC

uses the SMBUS polling method to detect if the battery is present.

Time Base is 10mS.

A --> "PORT PIN" definition for Events

B --> Active "HIGH" or "LOW"

C --> Event debounce counter.

D --> "ACTION" of event

const EVENT_DESCRIPTOR Events_Table[] =

{

/* A

D*/

{PORT_PIN(0, 3) | LOW,

10,

0x0000},

/* 0x00 - Power Switch Event.*/

{PORT_PIN(0, 4) | HIGH, 10,

0x9130},

/* 0x01 - AC Adaptor In/Out Event. */

{PORT_PIN(9, 1) | LOW,

10,

0x9131},

/* 0x02 - Battery In/Out Event. */

{UNUSED_PIN

| LOW,

00,

0x9137},

/* 0x03 - PME Event. */

};

//#define Events_Size (sizeof(Events_Table) / sizeof(EVENT_DESCRIPTOR))

MITX-CORE-820 Datasheet(PDF) 83 Page - Emerson Network Power

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