AXIOMTEK CAPA831 User Manual

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CAPA831

Intel

AtomTM D2550/N2800/N2600

Processor 3.5” SBC User’s Manual

Disclaimers

This manual has been carefully checked and believed to contain accurate information. Axiomtek Co.,

Ltd. assumes no responsibility for any infringements of patents or any third

party’s rights, and any liability arising from such use.

Axiomtek does not warrant or assume any legal liability or re

sponsibility for the accuracy, completeness or usefulness of any information in this document. Axiomtek does not make any commitment to update the information in this manual.

Axiomtek reserves the right to change or revise this

document and/or product at any time

without notice.

No part of this document may be reproduced, stored

in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Axiomtek Co., Ltd.

CAUTION

If you replace wrong batteries, it causes the danger of explosion. It is recom

mended by the manufacturer that you follow the manufacturer’s instructions to only replace the same or equivalent type of battery, and dispose of used ones.

iii

ESD Precautions

Computer boards have integrated circuits sensitive to static electricity. To prevent chipsets from electrostatic discharge damage, please take care of the following jobs with precautions:

 Do not remove boards or integrated circuits from their anti-static packaging until you are

ready to install them.

 Before holding the board or integrated circuit, touch an unpainted portion of the system

unit chassis for a few seconds. It discharges static electricity from your body.

 Wear a wrist-grounding strap, available from most electronic component stores, when

handling boards and components.

Trademarks Acknowledgments

Axiomtek is a trademark of Axiomtek Co., Ltd.

Windows

is a trademark of Microsoft Corporation.

AMI is trademark of American Megatrend Inc.

IBM, PC/AT, PS/2, VGA are trademarks of Internation

al Busine

ss Machines Corporation.

Intel

and Pentium® are trademarks of Intel Corporation.

Other brand names and trademarks are the properties

and registered brands of their

respective owners.

Table of Contents

Disclaimers.....................................................................................................ii

ESD Precautions...........................................................................................iii

Chapter 1 Introduction............................................. 1

1.1 Features ...............................................................................................1

1.2 Specifications......................................................................................2

1.3 Utilities Supported ..............................................................................3

Chapter 2 Board and Pin Assignments.................... 5

2.1 Board Dimensions and Fixing Holes.................................................5

2.2 Board Layout.......................................................................................7

2.3 Jumper

Settings.................................................................................. 9

2.3.1 Auto Power On (JP1) ................................................................................ 10

2.3.2 LVDS Voltage Selection (JP2)................................................................... 10

2.3.3 LVDS Brightness Control Mode Setting (JP3)........................................... 10

2.3.4 COM2 RS-232/422/485 Mode Setting (JP5, JP6, JP7) ............................ 10

2.3.5 COM1 RS-232/422/485 Mode Setting (JP8, JP9, JP10) ...........................11

2.3.6 COM4 Data/Power Selection (JP11)..........................................................11

2.3.7 COM3 Data/Power Selection (JP12)..........................................................11

2.3.8 COM2 Data/Power Selection (JP13)..........................................................11

2.3.9 Restore BIOS Optimal Defaults (JP14)..................................................... 12

2.3.10 COM1 Data/Power Selection (JP15)......................................................... 12

2.3.11 Audio Output Selection (JP16).................................................................. 12

2.4 Connectors ........................................................................................13

2.4.1 Inverter Connector (CN1).......................................................................... 14

2.4.2 CPU Fan Connector (CN2) ....................................................................... 14

2.4.3 LVDS Connector (CN3)............................................................................. 15

2.4.4 PCI-Express Mini Card Connector (CN4) ................................................. 17

2.4.5 Digital I/O Port Connector (CN5)............................................................... 17

2.4.6 Front Panel Connector (CN6) ................................................................... 18

2.4.7 Power Output Connector (CN7) ................................................................ 19

2.4.8 COM3 and COM4 Connector (CN9) ......................................................... 19

2.4.9 COM1 Connector (CN10).......................................................................... 19

2.4.10 COM2 Connector (CN11).......................................................................... 20

2.4.11 SMBus Connector (CN12) ........................................................................ 20

2.4.12 Audio Connector (CN13)........................................................................... 20

2.4.13 USB Wafer Connectors (CN14 and CN16)............................................... 21

2.4.14 DisplayPort Connector (CN15).................................................................. 21

2.4.15 VGA Connector (CN17)............................................................................. 22

2.4.16

Power Connector (ATX1) .......................................................................... 22

2.4.17 Serial ATA Connector (SATA1) .................................................................. 22

2.4.18 USB Connector (USB1) ............................................................................ 23

2.4.19 CFast™ Socket (SCFAST1)...................................................................... 23

2.4.20 Ethernet Ports (LAN1 and LAN2).............................................................. 24

Chapter 3 Hardware Description........................... 25

3.1 Microprocessors ...............................................................................25

3.2 BIOS ...................................................................................................25

3.3 System Memory.................................................................................25

3.4 I/O Port Address Map

........................................................................26

3.5 Interrupt Controller (IRQ) Map

.........................................................28

3.6 Memory Map ......................................................................................31

Chapter 4 AMI BIOS Setup Utility.......................... 33

4.1 Starting...............................................................................................33

4.2 Navigation Keys ................................................................................33

4.3 Main Menu..........................................................................................34

4.4 Advanced Menu.................................................................................35

4.5 Chipset Menu.....................................................................................42

4.6 Boot Menu..........................................................................................46

4.7 Security Menu....................................................................................47

4.8 Save & Exit Menu ..............................................................................48

Chapter 5 Drivers Installation................................ 51

5.1 Installing Chipset Driver...................................................................51

5.2 Installing Graphics Media Accelerator Driver.................................54

5.3 Installing Ethernet Driver..................................................................58

5.4 Installing Audio Driver......................................................................60

Appendix A Watchdog Timer................................... 63

About Watchdog Timer................................................................................63

How to Use Watchdog Timer.......................................................................63

Sample Program ..........................................................................................64

Appendix B Digital I/O ............................................. 67

About Digital I/O........................................................................................... 67

Digital I/O Programming..............................................................................67

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CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Introduction 1

Chapter 1

Introduction

The CAPA831, a Capa board, supports Intel

AtomTM D2550/N2800/N2600 processors . The

board integrates the Intel

NM10 chipset and delivers outstanding system performance through high-bandwidth interfaces, multiple I/O functions for interactive applications and various embedded computing solutions.

There is one 204-pin unbuffered SO-DIMM socket

for single ch

annel DDR3-800/1066MHz memory, maximum memory capacity up to 4GB (N2600 supports DDR3-800 up to 2GB only). It also features two Gigabit/Fast Ethernet ports, one serial ATA channels for total one Serial ATA hard drive at maximum transfer rate up to 300MB/sec, six USB 2.0 high speed compliant, and built-in HD audio codec that can achieve the best stability and reliability for industrial applications. Additionally, it provides you with unique embedded features, such as four serial ports and 3.5” form factor that applies an extensive array of PC peripherals.

1.1 Features

 Intel

AtomTM dual core D2550 (1.86 GHz), N2800 (1.86GHz) and N2600 (1.6GHz)

 Intel

NM10 chipset

 1 DDR3 SO-DIMM supports up to 4GB memory capacity  6 USB 2.0 ports  4 COM ports  +12V only DC-in supported

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

2 Introduction

1.2 Specifications

 CPU

 Intel

AtomTM dual core D2550 1.86 GHz.

 Intel

AtomTM dual core N2800 1.86 GHz.

 Intel

AtomTM dual core N2600 1.6 GHz

 Thermal Solution

 With Atom

dual core D2550 1.86 GHz; fan solution.

 With Atom

dual core N2800 1.86 GHz or dual core N2600 1.6GHz; fanless solution

 System Chipset

 Intel

NM10 chipset.

 BIOS

 American Megatrends Inc. UEFI (Unified Extensible Firmware Interface) BIOS.  16Mbit SPI Flash, DMI, Plug and Play.  RPL/PXE Ethernet Boot ROM.

 System Memory

 One 204-pin unbuffered DDR3 SO-DIMM socket.  Maximum to 4GB DDR3 1066MHz memory for D2550/N2800.  Maximum to 2GB DDR3 800MHz memory for N2600.

 Onboard Multi I/O

 Controller: Nuvoton NCT6627UD.  Serial Ports: Two ports for RS-232/422/485 and two ports for RS-232.

 Serial ATA

 One SATA-300 connector.

 CFast™ Socket

 One CFast™ socket.

 USB Interface

 Six USB ports with fuse protection and complies with USB Spec. Rev. 2.0.

 Display

 A slim type 15-pin D-Sub connector as VGA connector.  One 40-pin connector for 18/24-bit single/dual channel LVDS and one 8-pin inverter

connector. For N2600/N2800, LVDS resolution is up to 1600x1200 in 24-bit dual channel. For D2550, LVDS resolution is up to 1920x1200 in 24-bit dual channel.

 One DisplayPort.

 Trusted Platform Module (TPM)

 Controller: Infineon SLB9635 via LPC bus interface.  Complies with TPM1.2 main and PC client specification.

 Watchdog Timer

 1~255 seconds or minutes; up to 255 levels.

 Ethernet

 Two ports with Intel

82583V for Gigabit/Fast Ethernet.

 Audio

 HD audio compliant (with speaker/line-out and line-in/MIC-in) with Realtek ALC662.  Speaker/line-out and line-in/MIC-in via box header connector.

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Introduction 3

 Expansion Interface

 One PCI-Express Mini Card socket complies with PCI-Express Mini Card Spec.

V1.2.

 Power Input

 2x2 pin connector  +12V DC-in only  AT Auto Power ON function supported

 Power Management

 ACPI (Advanced Configuration and Power Interface).

 Form Factor

 3.5” form factor.

Note: All specifications and images are subject to change without notice.

1.3 Utilities Supported

 Chipset and graphics driver  Ethernet driver (82583V)  Audio driver  TPM utility  Unify API for hardware monitor, digital I/O and watchdog timer

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

4 Introduction

This page is intentionally left blank.

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 5

Chapter 2

Board and Pin Assignments

2.1 Board Dimensions and Fixing Holes

T op View

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

6 Board and Pin Assignments

Bottom View

Side View

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 7

2.2 Board Layout

T op View

Side View

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

8 Board and Pin Assignments

Bottom View

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 9

2.3 Jumper Settings

Jumper is a small component consisting of jumper clip and jumper pins. Install jumper clip on 2 jumpe

pins to close. And remove jumper clip from 2 jumper pins to open. Below illustration

shows how to set up jumper.

Properly configure jumper settings on the CAPA831 to meet your applic

ation purpose. Below

you can find a summary table of all jumpers and onboard default settings.

Note: Once the default jumper setting needs to be changed, please do it under

power-off condition.

Jumper Description Jumper Setting

JP1

Auto Power On Default: Disable

2-3 close

JP2

LVDS Voltage Selection Default: +3.3V

1-2 close

JP3

LVDS Brightness Control Mode Setting Default: PWM Mode

1-2 close

JP5 1-2 close

JP6 3-5, 4-6 close

JP7

COM2 RS-232/422/485 Mode Setting Default: RS-232

3-5, 4-6 close

JP8 1-2 close

JP9 3-5, 4-6 close

JP10

COM1 RS-232/422/485 Mode Setting Default: RS-232

3-5, 4-6 close

CN9 Pin 11: DCD 3-5 close

JP11

COM4 Data/Power Sele

ction

Default: RS-232 Data

CN9 Pin 18: RI 4-6 close CN9 Pin 1: DCD 3-5 close

JP12

COM3 Data/Power Sele

ction

Default: RS-232 Data

CN9 Pin 8: RI 4-6 close

CN11 Pin 1: DCD 3-5 close

JP13

COM2 Data/Power Sele

ction

Default: RS-232 Data

CN11 Pin 8: RI 4-6 close

JP14

Restore BIOS Optimal Defaults Default: Normal Operation

1-2 close

CN10 Pin 1: DCD 3-5 close

JP15

COM1 Data/Power Sele

ction

Default: RS-232 Data

CN10 Pin 8: RI 4-6 close

JP16

Audio Output Selection Default: Line-out

1-3, 2-4 close

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

10 Board and Pin Assignments

2.3.1 Auto Power On (JP1)

If JP1 is enabled for AC power input, the system will be automatically power on without pressing soft power button. If JP1 is disabled for AC power input, it is necessary to manually press soft power button to power on the system.

2.3.2 LVDS Voltage Selection (JP2)

The board supports voltage selection for flat panel displays. Use JP2 to set LVDS connector (CN3) pin 1~6 VCCM to +3.3V or +5V voltage level.

2.3.3 LVDS Brightness Control Mode Setting (JP3)

The JP3 enables you to select PWM or voltage control mode for inverter connector (CN1). These two control modes are for adjusting the brightness of LVDS panel.

2.3.4 COM2 RS-232/422/485 Mode Setting (JP5, JP6, JP7)

Use these jumpers to set COM2 port to operate as RS-232, RS-422 or RS-485 communication mode. When these jumpers are set to operate as RS-422 or RS485, please make sure COM2 is on data mode (see section 2.3.8)

Function Setting

Disable auto power on (Default) 2-3 close Enable auto power on 1-2 close

Function Setting

+3.3V level (Default) 1-2 close +5V level 2-3 close

Function Setting

PWM mode (Default) 1-2 close Voltage mode 3-4 close

Function Setting

RS-232 mode (Default)

JP5 1-2 close JP6 3-5, 4-6 close JP7 3-5, 4-6 close

RS-422 mode

JP5 3-4 close JP6 1-3, 2-4 close JP7 1-3, 2-4 close

RS-485 mode

JP5 5-6 close JP6 1-3, 2-4 close JP7 1-3, 2-4 close

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 11

2.3.5 COM1 RS-232/422/485 Mode Setting (JP8, JP9, JP10)

Use these jumpers to set COM1 port to operate as RS-232, RS-422 or RS-485 communication mode. When these jumpers are set to operate as RS-422 or RS485, please make sure COM1 is on data mode (see section 2.3.10)

2.3.6 COM4 Data/Pow er Selection (JP11)

The COM4 port has +5V level power capability on DCD and +12V level on RI by setting this jumper.

2.3.7 COM3 Data/Pow er Selection (JP12)

The COM3 port has +5V level power capability on DCD and +12V level on RI by setting this jumper.

2.3.8 COM2 Data/Pow er Selection (JP13)

The COM2 port has +5V level power capability on DCD and +12V level on RI by setting this jumper. When this port is set to +5V or +12V level, please make sure its communication mode is RS-232 (see section 2.3.4).

Function Setting

RS-232 mode (Default)

JP8 1-2 close JP9 3-5, 4-6 close JP10 3-5, 4-6 close

RS-422 mode

JP8 3-4 close JP9 1-3, 2-4 close JP10 1-3, 2-4 close

RS-485 mode

JP8 5-6 close JP9 1-3, 2-4 close JP10 1-3, 2-4 close

Function Setting

Power: Set CN9 pin 11 to +5V level 1-3 close

Data: Set CN9 pin 11 to DCD (Default) 3-5 close Power: Set CN9 pin 18 to +12V level 2-4 close Data: Set CN9 pin 18 to RI (Default) 4-6 close

Function Setting

Power: Set CN9 pin 1 to +5V level 1-3 close

Data: Set CN9 pin 1 to DCD (Default) 3-5 close Power: Set CN9 pin 8 to +12V level 2-4 close Data: Set CN9 pin 8 to RI (Default) 4-6 close

Function Setting

Power: Set CN11 pin 1 to +5V level 1-3 close Data: Set CN11 pin 1 to DCD (Default) 3-5 close

Power: Set CN11 pin 8 to +12V level 2-4 close Data: Set CN11 pin 8 to RI (Default) 4-6 close

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

12 Board and Pin Assignments

2.3.9 Restore BIOS Optimal Defaults (JP14)

Put jumper clip to pin 2-3 for a few seconds then move it back to pin 1-2. Doing this procedure can restore BIOS optimal defaults.

2.3.10 COM1 Data/Power Selection (JP15)

The COM1 port has +5V level power capability on DCD and +12V level on RI by setting this jumper. When this port is set to +5V or +12V level, please make sure its communication mode is RS-232 (see section 2.3.5).

2.3.11 Audio Output Selection (JP16)

Use this jumper to select line out or speaker out as source of audio output on audio connector. When speaker out is used, it delivers 1W/channel continuous at 8 Ohm loads.

Function Setting

Normal (Default) 1-2 close

Restore BIOS optimal defaults 2-3 close

Function Setting

Power: Set CN10 pin 1 to +5V level 1-3 close

Data: Set CN10 pin 1 to DCD (Default) 3-5 close Power: Set CN10 pin 8 to +12V level 2-4 close Data: Set CN10 pin 8 to RI (Default) 4-6 close

Function Setting

Line out (Default) 1-3, 2-4 close Speaker out 3-5, 4-6 close

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 13

2.4 Connectors

Signals go to other parts of the system through co

nne

ctors. Loose or improper connection might cause problems, please make sure all connectors are properly and firmly connected. Here is a summary table which shows all connectors on the hardware.

Connector Description

CN1 Inverter Connector

CN2 CPU Fan Connector

CN3 LVDS Connector

CN4 PCI-Express Mini Card Connector

CN5 Digital I/O Port Connector

CN6 Front Panel Connector

CN7 Power Output Connector

CN9 COM3 and COM4 Connector

CN10 COM1 Connector

CN11 COM2 Connector

CN12 SMBus Connector

CN13 Audio Connector

CN14 USB Wafer Port 4 and 5

CN15 DisplayPort Connector

CN16 USB Wafer Port 2 and 3

CN17 VGA Connector

ATX1 Power Connector

SATA1 Serial ATA Connector

USB1 USB Port 0 and 1

SCFAST1 CFastTM Socket

SDIMM1 DDRIII SO-DIMM Connector

LAN1 Ethernet Port 1

LAN2 Ethernet Port 2

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

14 Board and Pin Assignments

2.4.1 Inverter Connector (CN1)

This is a DF13-8S-1.25C 8-pin connector for inverter. We strongly recommend you to use the matching DF13-8S-1.25C connector to avoid malfunction.

8 1

2.4.2 CPU Fan Connector (CN2)

A CPU fan interface is available through this connector. You can find fan speed on BIOS Setup Utility if CPU fan is installed. For further information, see BIOS Setup Utility: Advanced\H/W Monitor\PC Health Status (see section 4.4).

Pin Signal

1 VBL1 (+12V level)

2 VBL1 (+12V level) 3 VBL2 (+5V level) 4 VBL_ENABLE

5 GND 6 GND 7 GND

8 VBL Brightness Control

Pin Signal

1 GND 2 +12V level 3 Fan speed feedback

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 15

2.4.3 LVDS Connector (CN3)

This board has a 40-pin connector for LVDS LCD interface. It is strongly recommended

to use the matching JST SHDR-40VS-B 40-pin connector for LVDS interface. Pin 1~6 VCCM can be set to +3.3V level or +5V level by setting JP2 (see section 2.3.2).

18-bit single channel

Pin Signal Pin Signal

1 VCCM 2 VCCM

3 VCCM 4 VCCM 5 VCCM 6 VCCM 7 N.C. 8 N.C.

9 GND 10 GND 11 N.C. 12 N.C. 13 N.C. 14 N.C.

15 GND 16 GND 17 N.C. 18 N.C. 19 N.C. 20 N.C.

21 GND 22 GND 23 Channel A D0- 24 N.C. 25 Channel A D0+ 26 N.C.

27 GND 28 GND 29 Channel A D1- 30 N.C. 31 Channel A D1+ 32 N.C.

33 GND 34 GND 35 Channel A D2- 36 Channel A CLK37 Channel A D2+ 38 Channel A CLK+

39 GND 40 GND

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

16 Board and Pin Assignments

24-bit single channel 18-bit du

al channel

24-bit dual channel

Pin Signal Pin Signal

1 VCCM 2 VCCM

3 VCCM 4 VCCM 5 VCCM 6 VCCM

N.C.

9 GND 10 GND 11 N.C. 12 N.C. 13 N.C. 14 N.C. 15 GND 16 GND 17 N.C. 18 N.C. 19 N.C. 20 N.C. 21 GND 22 GND 23 Channel A D0- 24 N.C. 25 Channel A D0+ 26 N.C. 27 GND 28 GND 29 Channel A D1- 30 Channel A D3- 31 Channel A D1+ 32 Channel A D3+ 33 GND 34 GND 35 Channel A D2- 36 Channel A CLK37 Channel A D2+ 38 Channel A CLK+ 39 GND 40 GND

Pin Signal Pin Signal

1 VCCM 2 VCCM 3 VCCM 4 VCCM 5 VCCM 6 VCCM

N.C.

9 GND 10 GND 11 N.C. 12 Channel B D0- 13 N.C. 14 Channel B D0+ 15 GND 16 GND 17 Channel B CLK- 18 Channel B D1- 19 Channel B CLK+ 20 Channel B D1+ 21 GND 22 GND 23 Channel A D0- 24 Channel B D2- 25 Channel A D0+ 26 Channel B D2+ 27 GND 28 GND 29 Channel A D1- 30 N.C. 31 Channel A D1+ 32 N.C. 33 GND 34 GND 35 Channel A D2- 36 Channel A CLK37 Channel A D2+ 38 Channel A CLK+ 39 GND 40 GND

Pin Signal Pin Signal

1 VCCM 2 VCCM

3 VCCM 4 VCCM

5 VCCM 6 VCCM

N.C.

8 N.C.

9 GND 10 GND

11 Channel B D3- 12 Channel B D0-

13 Channel B D3+ 14 Channel B D0+

15 GND 16 GND

17 Channel B CLK- 18 Channel B D1-

19 Channel B CLK+ 20 Channel B D1+

21 GND 22 GND

23 Channel A D0- 24 Channel B D2-

25 Channel A D0+ 26 Channel B D2+

27 GND 28 GND

29 Channel A D1- 30 Channel A D3-

31 Channel A D1+ 32 Channel A D3+

33 GND 34 GND

35 Channel A D2- 36 Channel A CLK-

37 Channel A D2+ 38 Channel A CLK+

39 GND 40 GND

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 17

2.4.4 PCI-Express Mini Card Connector (CN4)

This is a PCI-Express Mini Card connector which supports PCI-Express x1 link and USB

2.0 link. A PCI-Express Mini Card can be applied to either PCI-Express or USB 2.0. It complies with PCI-Express Mini Card Spec. V1.2.

2.4.5 Digital I/O Port Connector (CN5)

The board is equipped with an 8-channel (3 inputs and 5 outputs) digital I/O connector that meets requirements for a system customary automation control. The digital I/O can be configured to control cash drawers and sense warning signals from an Uninterrupted Power System (UPS), or perform store security control. You may use software programming to control these digital signals.

Pin Signal Pin Signal

1 WAKE# 2 +3.3VSB 3 No use 4 GND

5 No use 6 +1.5V 7 CLKREQ# 8 No use 9 GND 10 No use

11 REFCLK- 12 No use 13 REFCLK+ 14 No use 15 GND 16 No use

17 No use 18 GND 19 No use 20 W_DISABLE# 21 GND 22 PERST#

23 PE_RXN3 24 +3.3VSB 25 PE_RXP3 26 GND 27 GND 28 +1.5V

29 GND 30 SMB_CLK 31 PE_TXN3 32 SMB_DATA 33 PE_TXP3 34 GND

35 GND 36 USB_D837 GND 38 USB_D8+ 39 +3.3VSB 40 GND

41 +3.3VSB 42 No use 43 GND 44 No use 45 No use 46 No use 47 No use 48 +1.5V

49 No use 50 GND 51 No use 52 +3.3VSB

Pin Signal Pin Signal

1 Digital Input 0 2 Digital Output 0

3 Digital Input 1 4 Digital Output 1 5 Digital Input 2 6 Digital Output 2 7 GND 8 Digital Output 3

9 GND 10 Digital Output 4

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

18 Board and Pin Assignments

2.4.6 Front Panel Connector (CN6)

Power LED

Pin 1 connects anode(+) of LED and pin 5 con

cts cathode(-) of LED. The power LED

lights up when the system is powered on.

External Speaker and Internal Buzzer

Pin 2, 4, 6 and 8 connect the case-mounted speaker unit or internal buzzer. While con

cting the CPU board to an internal buzzer, please set pin 2 and 4 closed; while connecting to an external speaker, you need to set pins 2 and 4 opened and connect the speaker cable to pin 8(+) and pin 2(-).

Power On/Off Button

Pin 9 and 10 connect the power button on front p

el to the CPU board, which allows

users to turn on or off power supply.

System Reset Switch

Pin 11 and 12 connect the case-mounted reset

switch th

at reboots your computer without turning off the power switch. It is a better way to reboot your system for a longer life of system power supply.

HDD Activity LED

This connection is linked to hard drive activity LED on the contro

l p

anel. LED flashes when HDD is being accessed. Pin 13 and 14 connect the hard disk drive to the front panel HDD LED, pin 13 is assigned as cathode(-) and pin 14 is assigned as anode(+).

Pin Signal

1 PWRLED+ 2 EXT SPK-

3 N.C. 4 Buzzer 5 PWRLED-

6 N.C. 7 N.C. 8 EXT SPK+

9 PWRSW10 PWRSW+ 11 HW RST-

12 HW RST+ 13 HDDLED14 HDDLED+

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Board and Pin Assignments 19

2.4.7 Power Output Connector (CN7)

Use CN7 for interfacing to SATA 2.5" HDD power supply.

2.4.8 COM3 and COM4 Connector (CN9)

Both COM3 and COM4 ports have +5V level power capability on DCD and 12V level on RI by setting JP12 and JP11, respectively (see section 2.3.7 and 2.3.6). The pin assignments are listed in table below.

2.4.9 COM1 Connector (CN10)

This connector is equipped with +5V level power capability on DCD and +12V level on RI by setting JP15 (see section 2.3.10). The pin assignments of RS-232/RS-422/RS-485 are listed in table below. If you need COM1 port to support RS-422 or RS-485, please refer to section 2.3.5.

Pin Signal

1 +12V level 2 GND 3 GND

4 +5V level

Pin Signal Pin Signal

1 DCD3 2 DSR3 3 RXD3 4 RTS3 5 TXD3 6 CTS3

7 DTR3 8 RI3 9 GND 10 N.C. 11 DCD4 12 DSR4

13 RXD4 14 RTS4 15 TXD4 16 CTS4 17 DTR4 18 RI4

19 GND 20 N.C.

Pin RS-232 RS-422 RS-485

1 DCD TX- Data2 DSR No use No use

3 RXD TX+ Data+ 4 RTS No use No use 5 TXD RX+ No use

6 CTS No use No use 7 DTR RX- No use 8 RI No use No use

9 GND No use No use 10 No use No use No use

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20 Board and Pin Assignments

2.4.10 COM2 Connector (CN11)

The COM2 port has +5V level power capability on DCD and +12V level on RI by setting JP13 (see section 2.3.8). The pin assignments of RS-232/RS-422/RS-485 are listed in table below. If you need COM2 port to support RS-422 or RS-485, please refer to section 2.3.4.

2.4.11 SMBus Connector (CN12)

This connector is for SMBus interface. The SMBus (System Management Bus) is a simple 2-wire bus for the purpose of lightweight communication. Most commonly it is used for communication with the power source related applications such as on/off instructions.

2.4.12 Audio Connector (CN13)

Pin 7 and pin 9 of connector CN13 can be set to different audio source by setting JP16 (see section 2.3.11).

Pin RS-232 RS-422 RS-485

1 DCD TX- Data2 DSR No use No use 3 RXD TX+ Data+

4 RTS No use No use 5 TXD RX+ No use 6 CTS No use No use

7 DTR RX- No use 8 RI No use No use 9 GND No use No use

10 No use No use No use

Pin Signal

1 CLK 2 DATA 3 GND

Pin Signal Pin Signal

1 MIC_IN 2 GND 3 LINE_IN_L 4 GND 5 LINE_IN_R 6 GND

7 AUDIO_OUT_L 8 GND 9 AUDIO_OUT_R 10 GND

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Board and Pin Assignments 21

2.4.13 USB Wafer Connectors (CN14 and CN16)

These 2x5 pin wafers are Universal Serial Bus (USB) connectors. They are for installing versatile USB 2.0 compliant interface peripherals.

CN14 carries USB port 4 and 5 while CN16 carries USB port 2 and 3.

CN14

CN16

2.4.14 DisplayPort Connector (CN15)

DisplayPort interface is available through connector CN15.

1 20

Pin Signal Pin Signal

USB VCC (+5V level)

USB VCC (+5V

level) 3 USB #4_D- 4 USB #5_D5 USB #4_D+ 6 USB #5_D+ 7 GND 8 GND

9 GND 10 GND

Pin Signal Pin Signal

USB VCC (+5V level)

USB VCC (+5V

level) 3 USB #2_D- 4 USB #3_D5 USB #2_D+ 6 USB #3_D+ 7 GND 8 GND

9 GND 10 GND

Pin Signal

1 DPB_LANE0 2 GND 3 DPB_LANE0#

4 DPB_LANE1 5 GND 6 DPB_LANE1#

7 DPB_LANE2 8 GND 9 DPB_LANE2#

10 DPB_LANE3 11 GND 12 DPB_LANE3#

13 Detect Pin 14 GND 15 DPB_AUX

16 GND 17 DPB_AUX# 18 DPB_HPDE

19 GND 20 +3.3V

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22 Board and Pin Assignments

2.4.15 VGA Connector (CN17)

The CN17 is a slim type 15-pin D-Sub connector which is commonly used for CRT VGA monitor. This VGA interface configuration can be configured via software utility.

2.4.16 Power Connector (ATX1)

The ATX1 is a 4-pin power supply interface. External power supply plug fits into ATX1 in only one orientation. Properly press down power supply plug until it completely and firmly fits into this connector. Loose connection may cause system instability.

2.4.17 Serial ATA Connector (SATA1)

These Serial Advanced Technology Attachment (Serial ATA or SATA) connectors are for high-speed SATA interface ports. They are computer bus interfaces for connecting to devices such as hard disk drives.

Pin Signal Pin Signal

1 Red 2 Green

3 Blue 4 N.C. 5 GND 6 DETECT 7 GND 8 GND

9 VCC 10 GND 11 N.C. 12 DDC DATA 13 Horizontal Sync 14 Vertical Sync

15 DDC CLK

Pin Signal

1 GND 2 GND 3 +12V

4 +12V

Pin Signal

1 GND 2 SATA_TX+

3 SATA_TX4 GND 5 SATA_RX-

6 SATA_RX+ 7 GND

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Board and Pin Assignments 23

2.4.18 USB Connector (USB1)

This Universal Serial Bus (compliant with USB 2.0 (480Mbps)) connector on the rear I/O are for installing USB peripherals such as keyboard, mouse, scanner, etc.

2.4.19 CFast™ Socket (SCFAST1)

The board is equipped with a CFastTM socket on the bottom side to support a CFastTM card which is based on the Serial ATA bus. The socket is specially designed to avoid incorrect installation of the CFast

card. When installing or removing the CFastTM card,

please make sure the system power is off. The CFast

card by default identifies itself as

C: or D: drive in your PC system.

Pin Signal Pin Signal

USB VCC (+5V level)

USB VCC (+5V

level) 2 USB #0_D- 6 USB #1_D-

3 USB #0_D+ 7 USB #1_D+ 4 GND 8 GND

Pin Signal Pin Signal

1 GND 13 N.C

2 SATA_TX+ 14 GND 3 SATA_TX- 15 N.C 4 GND 16 CFAST_LED#

5 SATA_RX- 17 N.C 6 SATA_RX+ 18 N.C 7 GND 19 N.C

8 N.C 20 +3.3V Level 9 GND 21 +3.3V Level 10 N.C 22 GND

11 N.C 23 GND 12 N.C 24 N.C

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

24 Board and Pin Assignments

2.4.20 Ethernet Ports (LAN1 and LAN2)

The board has two RJ-45 connectors; LAN1 and LAN2. Ethernet connection can be established by plugging one end of the ethernet cable into this RJ-45 connector and the other end (phone jack) to a 1000/100/10-Base-T hub.

A B

Pin Signal Pin Signal

L1 MDI0+ L5 MDI2+ L2 MDI0- L6 MDI2L3 MDI1+ L7 MDI3+ L4 MDI1- L8 MDI3A Active LED (Yellow)

100 LAN LED (Green) / 1000 LAN LED (Orange)

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Hardware Description 25

Chapter 3

Hardware Description

3.1 Microprocessors

The CAPA831 supports Intel

AtomTM D2550/N2800/N2600 processors, which enable your

system to operate under Windows

7 environments. The system performance depends on the microprocessor. Make sure all correct settings are arranged for your installed microprocessor to prevent the CPU from damages.

3.2 BIOS

The CAPA831 use

AMI Plug and Play BIOS with a single 16Mbit SPI Flash.

3.3 System Memory

The CAPA831 supports one 204-pin DDR3 SO-DIMM socket for a maximum memory of 4GB DDR3 SDRA

Ms.

The memory module comes in sizes of 1GB, 2GB and 4GB.

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26 Hardware Description

3.4 I/O Port Address Map

The Intel

AtomTM D2550/N2800/N2600 processors communicate via I/O ports. Total 1KB port

addresses are available for assigning to other devices via I/O expansion cards.

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Hardware Description 27

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28 Hardware Description

3.5 Interrupt Controller (IRQ) Map

The interrupt controller (IRQ) mapping list is shown as follows:

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Hardware Description 29

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30 Hardware Description

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Hardware Description 31

3.6 Memory Map

The memory mapping list is shown as follows:

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32 Hardware Description

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CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

AMI BIOS Setup Utility 33

Chapter 4

AMI BIOS Setup Utility

The AMI UEFI BIOS provides users with a built-in setup program to modify basic syste

m configuration. All configured parameters are stored in a flash chip to save the setup information whenever the power is turned off. This chapter provides users with detailed description about how to set up basic system configuration through the AMI BIOS setup utility.

4.1 Starting

To enter the setup screens, follow the steps below:

1. Turn on the computer and press the <Del> key immediately.

2. After you press the <Del> key, the main BIOS setup menu displays. You can access the

other setu

p scre

ens from the main BIOS setup menu, such as the Advanced and Chipset

menus.

Note: If your computer can not boot after making and saving system changes with Setup,

you can restore BIOS optimal defaults by setting JP14 (see section 2.3.9).

It is strongly recommended that you should avoid changing the chipset’s defaults. Both AMI and you

r system manufacturer have carefully set up these defaults that provide the best

performance and reliability.

4.2 Navigation Keys

The BIOS setup/utility uses a key-based navigation sy

stem call

ed hot keys. Most of the BIOS setup utility hot keys can be used at any time during the setup navigation process. These keys include <F1>, <F2>, <Enter>, <ESC>, <Arrow> keys, and so on.

Note: Some of the navigation keys di ffer from one screen to another.

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34 AMI BIOS Setup Utility

Hot Keys Description

 Left/Right

The Left and Right <Arrow> keys allow you to select a setup screen.

 Up/Down

The Up and Down <Arrow> keys allow you to select a setup screen or sub-screen.

+ Plus/Minus

The Plus and Minus <Arrow> keys allow you to change the field value of a particular setup item.

Tab

The <Tab> key allows you to select setup fields.

The <F1> key allows you to display the General Help screen.

The <F2> key allows you to Load Previous Values.

The <F3> key allows you to Load Optimized Defaults.

The <F4> key allows you to save any changes you have made and exit Setup. Press the <F4> key to save your changes.

Esc

The <Esc> key allows you to discard any changes you have made and exit the Setup. Press the <

Esc> key to exit the setup without saving your

changes.

Enter

The <Enter> key allows you to display or chang

e the setup option listed for a particular setup item. The <Enter> key can also allow you to display the setup sub- screens.

4.3 Main Menu

When you first enter the setup utility, you will enter the Main setup screen. Y

ou can al

ways return to the Main setup screen by selecting the Main tab. System Time/Date can be set up as described below. The Main BIOS setup screen is shown below.

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AMI BIOS Setup Utility 35

 System Date/Time

Use this option to change the system time and date. Highlight System Time or System Date using the <Arrow> keys. Enter new values through the keyboard. Press the <Tab>

key or the <Arrow> keys to move between fields. The date must be entered in MM/DD/YY format. The time is entered in HH:MM:SS format.

4.4 Advanced Menu

 Launch PXE OpROM

Use this item to enable or disable the boot ROM function of the onboard LAN chip when the system boots up.

 Launch Storage OpROM

Enable or disable boot option for legacy mass storage devices with option ROM.

The Advanced menu also allows users to set conf

iguratio

n of the CPU and other system

devices. You can select any of the items in the left frame of the screen to go to the sub menus:

► ACPI Settings ► Trusted Computing ► CPU Configuration ► IDE Configuration ► NCT6627UD Super IO Configuration ► NCT6627UD HW Monitor

For items marked with “”,

please pre

ss <Enter> for more options.

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36 AMI BIOS Setup Utility

 ACPI Settings

ACPI Sleep State

When the sleep button is pressed, the system will be in the ACPI sleep st

ate. The default

is S1 (CPU Stop Clock).

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AMI BIOS Setup Utility 37

 Trusted Computing

This screen provides function for specifying the TPM settings.

TPM Support

Enable or disable BIOS support for security device. “Disable” is the

default.

Current Status Information

Display current TPM status information.

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38 AMI BIOS Setup Utility

 CPU Configuration

This screen shows the CPU Configuration.

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AMI BIOS Setup Utility 39

 IDE Configuration

In the IDE Configuration menu, you can see the currently installed hardware in the SATA ports. During system boot up, the BIOS automatically detects the presence of SATA

devices.

Configure SATA as

Determine how SATA controller(s) operate. Operation mode options are IDE Mode and AHCI (Advanced

Host Controller Interface) Mode.

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40 AMI BIOS Setup Utility

 NCT6627UD Super IO Configuration

You can use this screen to select options for the Super IO Configuration, and change the value of the selected option. A description of the selected item appears on the right side of

the screen. For items marked with “”, please press <Enter> for more options.

Serial Port 1~4 Configuration

Use these items to enable or disable the serial p

ort 1~4.

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AMI BIOS Setup Utility 41

 NCT6627UD HW Monitor

This screen monitors hardware health status.

This screen displays the temperature of system and

CPU, cooling fan speed in RPM and

system voltages (VCORE, +1.05V, +3.3V and +12V).

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42 AMI BIOS Setup Utility

4.5 Chipset Menu

The Chipset menu allows users to change the advanced chipset settings. You can select any of the items in the lef

frame of the screen to go to the sub menus:

► Host Bridge

For items marked with “”,

please pre

ss <Enter> for more options.

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AMI BIOS Setup Utility 43

 Host Bridge

This screen allows users to configure parameters of Host Bridge chipset.

Memory Frequency and Timing

Use this item to refer to the information related to memory frequ

ency.

Intel IGD Configuration

Use this item to configure internal graphics controller.

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44 AMI BIOS Setup Utility

 Intel IGD Configuration

IGFX – Boot T ype

Select the video device which will be activated durin

g POST (Power-On Self Test). This

has no effect if external graphics present.

DP-L VDS Panel Type

Select LVDS panel resolution.

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AMI BIOS Setup Utility 45

Brightness

Use this item to select the brightness percenta

ge of LVDS panel. Its range is from 30% to

100%. The default is 70%.

Control Mode

Use this item for brightness control mode. The default is PWM Mode. Voltage Mode can be used by jumper selection. (see section 2.3.3).

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46 AMI BIOS Setup Utility

4.6 Boot Menu

The Boot menu allows users to chang

e boot option

s of the system.

 Setup Prompt Timeout

Number of seconds to wait for setup activation key. 65535(0xFFFF) means indefinite waiting.

 Bootup NumLock State

Use this item to select the power-on state for the NumLock.

 Quiet Boot

Select to display either POST output messages or a splash screen during boot-up.

 Boot Option Priorities

These are settings for boot priority. Specify the boot device priority sequence from the available devices.

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AMI BIOS Setup Utility 47

4.7 Security Menu

The Security menu allows users to change the se

rity settings for the system.

 Administrator Password

This item indicates whether an administrator password has been set (installed or uninstalled).

 User Password

This item indicates whether an user password has been set (installed or uninstalled).

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48 AMI BIOS Setup Utility

4.8 Save & Exit Menu

The Save & Exit menu allows users to load your system configu

ration with optimal or fail-safe

default values.

 Save Changes and Exit

When you have completed the system configuration changes, select this option to leave Setup and return to Main Menu. Select Save Changes and Exit from the Save & Exit menu and press <Enter>. Select Yes to save changes and exit.

 Discard Changes and Exit

Select this option to quit Setup without making any permanent changes to the system configuration and return to Main Menu. Select Discard Changes and Exit from the Save & Exit menu and press <Enter>. Select Yes to discard changes and exit.

 Save Changes and Reset

When you have completed the system configuration changes, select this option to leave Setup and reboot the computer so the new system configuration parameters can take effect. Select Save Changes and Reset from the Save & Exit menu and press <Enter>. Select Yes to save changes and reset.

 Discard Changes and Reset

Select this option to quit Setup without making any permanent changes to the system configuration and reboot the computer. Select Discard Changes and Reset from the Save & Exit menu and press <Enter>. Select Yes to discard changes and reset.

 Save Changes

When you have completed the system configuration changes, select this option to save changes. Select Save Changes from the Save & Exit menu and press <Enter>. Select Yes to save changes.

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AMI BIOS Setup Utility 49

 Discard Changes

Select this option to quit Setup without making any permanent changes to the system configuration. Select Discard Changes from the Save & Exit menu and press <Enter>. Select Yes to discard changes.

 Restore Defaults

It automatically sets all Setup options to a complete set of default settings when you select this option. Select Restore Defaults from the Save & Exit menu and press <Enter>.

 Save as User Defaults

Select this option to save system configuration changes done so far as User Defaults. Select Save as User Defaults from the Save & Exit menu and press <Enter>.

 Restore User Defaults

It automatically sets all Setup options to a complete set of User Defaults when you select this option. Select Restore User Defaults from the Save & Exit menu and press <Enter>.

 Boot Override

Select a drive to immediately boot that device regardless of the current boot order.

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50 AMI BIOS Setup Utility

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Drivers Installation 51

Chapter 5

Drivers Installation

The device drivers are located on the product inform

ation CD that comes with the CAPA831 Series package. The auto-run function of drivers will guide you to install the utilities and device drivers under Windows system. You can follow the onscreen instructions to install these devices:

 Chipset  Graphics  Ethernet  Audio

5.1 Installing Chipset Driver

1. Run the infinst_auto1.exe program from the driver directory in product information CD.

Click “Next” to next s

tep.

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52 Drivers Installation

2. A Readme File Information screen appears to show you the system requi

rements and

installation information. Click “Next” to next step.

3. Please wait while setup processes the following operations.

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Drivers Installation 53

4. You are suggested to select “Yes, I want to rest

art this comp

uter now”. Click “Finish” to

complete the setup process and reboot.

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54 Drivers Installation

5.2 Installing Graphics Media Accelerator Driver

1. Run the setup.exe program from the driver di

recto

ry in product information CD. Click

“Next” to next step.

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Drivers Installation 55

2. When Intel

License Agreement screen appears, please click “Yes” to next step.

3. A Readme File Information screen appears to show

you the system requirements and

installation information. Click “Next” to next step.

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56 Drivers Installation

4. Please wait while setup processes the following operations.

5. When the following screen appears, please click “Next”.

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Drivers Installation 57

6. You are suggested to select “Yes, I want to rest

art this computer now”. Click “Finish” to

compl

ete the setup process and reboot.

Note: After the computer reboots, the display is in

extended mode. Please click hot key <Ctrl+Alt+F1> to switch display back to single mode.

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58 Drivers Installation

5.3 Installing Ethernet Driver

1. Unzip PROWin32 for ethernet driver fro

the driver directory in product information CD.

Click “Next” to start the installation.

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Drivers Installation 59

2. When the following screen appears, please sele

ct the program feature

s you want to

install. Click “Next” to continue.

3. Click “Finish” to complete the installation.

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60 Drivers Installation

5.4 Installing Audio Driver

1. Run the setup.exe for audio from the driver di

ctory in product information CD. Click

“Next” to continue.

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Drivers Installation 61

2. You are suggested to select “Yes, I want to rest

art

my computer now”. Click “Finish” to

complete the setup process and reboot.

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62 Drivers Installation

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Watchdog Timer 63

Appendix A

Watchdog Timer

About Watchdog Timer

Software stability is major issue in most applicatio

n. Some embedded systems are not watched by human for 24 hours. It is usually too slow to wait for someone to reboot when computer hangs. The systems need to be able to reset automatically when things go wrong. The watchdog timer gives us solution.

The watchdog timer is a counter that tri

ggers

a system reset when it counts down to zero from a preset value. The software starts counter with an initial value and must reset it periodically. If the counter ever reaches zero which means the software has crashed, the system will reboot.

How to Use Watchdog Timer

The I/O port base addresses of watchdog timer are 2E (hex) a

nd 2F (hex). The 2E (hex) and

2F (hex) are address and data port respectively.

Assume that program A is put in a loop that must execute at least once every 10ms. Initialize watchdo

g timer with a value bigge

r than 10ms. If the software has no problems; watchdog

timer will never expire because software will always restart the counter before it reaches zero.

Begin

Enable and Initialize

Watchdog Timer

Program A

Disable Watchdog

Timer

Begin

Enable and Initialize

Watchdog Timer

Program A

Reset Watchdog

Timer

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64 Watchdog Timer

Sample Program

Assembly sample code :

;Enable WDT: mov dx,2Eh mov al,87 ;Un-lock super I/O out dx,al out dx,al

;Select Logic device: mov dx,2Eh mov al,07h out dx,al mov dx,2Fh mov al,08h out dx,al

;Activate WDT: mov dx,2Eh mov al,30h out dx,al mov dx,2Fh mov al,01h out dx,al

;Set Second or Minute : mov dx,2Eh mov al,0F5h out dx,al mov dx,2Fh

mov al,Nh

;N=0

0h or 08h(see below

Note

)

out dx,al ;Set base timer :

mov dx,2Eh mov al,0F6h out dx,al mov dx,2Fh mov al,Mh ;M=

00h,01h,...FFh (hex),Value=0 to 255

out dx,al ;(see below

Note

)

;Disable WDT: mov dx,2Eh mov al,30h out dx,al mov dx,2Fh mov al,00h ;Can be disabled at any time out dx,al

Note:

If N=00h, the time base is set to second. M = time value

00: Time-

out Disable 01: Time-out occurs after 1 second 02: Time-out occurs after 2 seconds 03: Time-out occurs after 3 seconds

. .

FFh: Time-out occurs after 255 seconds

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Watchdog Timer 65

If N=08h, the time base is set to minute. M = time value

00: Time-

out Disable 01: Time-out occurs after 1 minute 02: Time-out occurs after 2 minutes 03: Time-out occurs after 3 minutes

. .

FFh: Time-out occurs after 255 minutes

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66 Watchdog Timer

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Digital I/O 67

Appendix B

Digital I/O

About Digital I/O

The onboard digital I/O has 8 bits (DIO0~7). Each bit can be set to function as input or output by soft

ware programming. In default, all pins are pulled high with +5V level (according to main

power). The BIOS default settings are 3 inputs and 5 outputs where all of these pins are set to

CN5

Digital I/O Programming

Assembly sample code :

Set functionality:

;Start set DIO program: mov dx,2Eh mov al,87h ;Un-lock super I/O out dx,al out dx,al

mov dx,2Eh mov al,07h out dx,al mov dx,2Fh mov al,08h out dx,al

mov dx,2Eh mov al,30h out dx,al mov dx,2Fh mov al,02h out dx,al

Pin Signal Pin Signal

1 DI0 (Bit0) 2 DO0 (Bit 3)

3 DI1 (Bit1) 4 DO1 (Bit 4)

5 DI2 (Bit2) 6 DO2 (Bit 5)

7 GND 8 DO3 (Bit 6)

9 GND 10 DO4 (Bit 7)

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68 Digital I/O

;Programming DIO as in/out. mov dx,2Eh mov al,0E0h out dx,al mov dx,2Fh mov al,Nh

;If N=07h, DIO is programmed as 3 inputs

out dx,al ;and 5 outputs (see below

Note1

)

Digital Input:

;Read digital input data. mov dx,2Eh mov al,0E1h out dx,al mov dx,2Fh ;If N=07h, bi

~2 represent DIO0~2,

in dx, al ;bit0~2 are DIO pin 0~2 state (1 High, 0 Low)

;(see below

Note2

)

Digital Output:

; Set DIO digital output pins value. mov dx,2Eh mov al,0E1h out dx,al mov dx,2Fh mov al,M

f N=07h, bit3~7 represent DIO3~7, out dx,al ;set output value M ;bit3~7 are DIO pin 3~7 state (1 High, 0 Low) ;if M=FFh, all DIO pins are high

;(see below

Note3

)

Note1:

The N has 8 bits. Every bit’

s value is either 1 or 0. " 1" means that the bit is programmed to input. " 0" means that the bit is programmed to output.

Ex:

1. N=00h=00000000b

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output Output Output Output

2. N=02h=00000010b

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output Output

Input

Output

3. N=07h=00000111b

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output

Input Input Input

4. N=F2h=11110010b

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0 Input Input Input Input

Output Output

Input

Output

Note2:

If N=07h

DIO7

DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output

Input Input Input

CAPA831 Intel® AtomTM D2550/N2800/N2600 Processor 3.5” SBC

Digital I/O 69

1. When DIO0~2 are connected to external device, the device sets DIO0~2 to high

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output

1 1 1

2. When DIO0~2 are connected to external device, the device sets DIO0 to low and DIO1~2 to high

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output

1 1

Note3:

If N=07h

DIO7

DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

Output Output Output Output Output

Input Input Input

1. When M=FFh

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

1 1 1 1 1 1 1 1

2. When M=D7h

DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0

1 1 0 1 0 1 1 1

AXIOMTEK CAPA831 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual