CAPA840/843
Intel® AtomTM E3845/E3827
Intel® Celeron® J1900
Processors Capa Board
User’s Manual
ii
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 responsibility 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 recommended 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.
Copyright 2016 Axiomtek Co., Ltd.
All Rights Reserved
March 2016, Version A4
Printed in Taiwan
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 a trademark of American Megatrend Inc.
IBM, PC/AT, PS/2, VGA are trademarks of International Business Machines Corporation.
Intel® and Celeron® are trademarks of Intel Corporation.
Other brand names and trademarks are the properties and registered brands of their
respective owners.
iv
Table of Contents
Disclaimers ..................................................................................................... ii
ESD Precautions ........................................................................................... iii
Chapter 1 Introduction ............................................. 1
1.1 Features ............................................................................................... 2
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 LVDS Brightness Control Mode Setting (JP1) .......................................... 10
2.3.2 LVDS Voltage Selection (JP2 and JP3) .................................................... 10
2.3.3 Restore BIOS Optimal Defaults (JP4) ....................................................... 10
2.3.4 COM1 Data/Power Selection (JP6) ........................................................... 10
2.3.5 Auto Power On (JP7) ................................................................................. 11
2.4 Connectors ........................................................................................ 12
2.4.1 Digital I/O Connector (CN1) ...................................................................... 13
2.4.2 CPU Fan Connector (CN2) ....................................................................... 13
2.4.3 SATA Power Connector (CN4) .................................................................. 13
2.4.4 Front Panel Connector (CN6) ................................................................... 14
2.4.5 Inverter Connector (CN7) .......................................................................... 15
2.4.6 Internal USB 2.0 Port (CN8) ...................................................................... 15
2.4.7 LVDS Connector (CN9) ............................................................................. 16
2.4.8 Audio Connector (CN10) ........................................................................... 18
2.4.9 Ethernet Port (CN11) ................................................................................. 18
2.4.10 USB Ports (CN12 and CN13) .................................................................... 18
2.4.11 HDMI Connector (CN14) ........................................................................... 19
2.4.12 SMBus Connector (CN15) ........................................................................ 19
2.4.13 VGA Connector (CN16) ............................................................................. 19
2.4.14 COM Connectors (CN17 and CN18)......................................................... 20
2.4.15 SATA Connector (CN19) ........................................................................... 20
2.4.16 ATX Power Connector (CN20) .................................................................. 21
2.4.17 PCI-Express Mini Card (USB) and mSATA Connector (SCN1) ................ 21
2.4.18 PCI-Express Mini Card Connector (SCN2) ............................................... 22
2.4.19 ZIO Expansion Connector (SCN5) ............................................................ 23
Chapter 3 Hardware Description ........................... 25
v
3.1 Microprocessors ............................................................................... 25
3.2 BIOS ................................................................................................... 25
3.3 System Memory ................................................................................. 25
3.4 I/O Port Address Map ........................................................................ 25
3.5 Interrupt Controller (IRQ) Map ......................................................... 26
3.6 Memory Map ...................................................................................... 29
Chapter 4 AMI BIOS Setup Utility .......................... 31
4.1 Starting ............................................................................................... 31
4.2 Navigation Keys ................................................................................ 31
4.3 Main Menu .......................................................................................... 33
4.4 Advanced Menu ................................................................................. 34
4.5 Chipset Menu ..................................................................................... 50
4.6 Security Menu .................................................................................... 55
4.7 Boot Menu .......................................................................................... 56
4.8 Save & Exit Menu .............................................................................. 57
Appendix A Watchdog Timer ................................... 59
A.1 About Watchdog Timer ..................................................................... 59
A.2 How to Use Watchdog Timer ............................................................ 59
A.3 Sample Program ................................................................................ 60
Appendix B Digital I/O ............................................. 63
B.1 About Digital I/O ................................................................................ 63
B.2 Digital I/O Programming ................................ ................................ ... 63
Appendix C BIOS Flash Utility ................................ 67
Appendix D Window® 7 Installation Guide ............... 71
vi
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CAPA840/843 Capa Board
Introduction 1
Chapter 1
Introduction
The CAPA840, a 3.5” board, supports Intel® AtomTM E3845/E3827 processors. Meanwhile
CAPA843, a 3.5’ board, supports Intel® Celeron® J1900 processors. Both of them deliver
outstanding system performance through high-bandwidth interfaces, multiple I/O functions for
interactive applications and various embedded computing solutions.
The CAPA840/843 have two 204-pin unbuffered SO-DIMM sockets for dual channel DDR3L
1333/1066MHz memory with maximum capacity up to 8GB. There are two Gigabit/Fast
Ethernet ports, one SATA port with transfer rate up to 3Gb/s, one USB 3.0 super speed and
four 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 two serial ports (one RS-232/422/485 and one RS-232) and 3.5”
form factor that applies an extensive array of PC peripherals.
CAPA840/843 Capa Board
2 Introduction
1.1 Features
CAPA840 - Intel
®
AtomTM quad core E3845 (1.91GHz) and dual core E3827 (1.75GHz)
CAPA843 - Intel
®
Celeron® quad core J1900 (2GHz)
2 DDR3L SO-DIMM supports up to 8GB memory capacity
4 USB 2.0 ports
1 USB 3.0 port
2 COM ports
2 PCI-Express Mini Cards
+10V~+24V DC-in supported
Wide operating temperature supported
1.2 Specifications
CPU
CAPA840
- Intel® AtomTM quad core E3845 1.91GHz.
- Intel® AtomTM dual core E3827 1.75GHz.
CAPA843
- Intel® Celeron® quad core J1900 2GHz.
Thermal Solution
Passive.
Operating Temperature
-20°C~70°C.
BIOS
American Megatrends Inc. UEFI (Unified Extensible Firmware Interface) BIOS.
64Mbit SPI Flash, DMI, Plug and Play.
PXE Ethernet Boot ROM.
System Memory
Two 204-pin unbuffered DDR3L SO-DIMM sockets.
Maximum up to 8GB DDR3L 1333/1066MHz memory.
Note
Please make sure the lower SO-DIMM socket must be inserted and both memory
modules are of the same size, chip width, density and rank. It is suggested to
insert the 4GB DDR3L module on each SO-DIMM socket for better performance.
Onboard Multi I/O
Controller: Fintek F81803U.
Serial Ports: One port for RS-232/422/485 and one port for RS-232.
Serial ATA
One SATA-300 connector.
mSATA supported
USB Interface
Four USB ports on the rear I/O: One for USB 3.0 and three for USB 2.0.
One USB 2.0 port in 4-pin internal connector.
CAPA840/843 Capa Board
Introduction 3
Display
One 15-pin D-Sub as VGA connector.
One 2x20-pin connector for 18/24-bit single/dual channel LVDS and one 8-pin
inverter connector. LVDS resolution is up to 1920x1200 in 24-bit dual channels.
One HDMI.
Trusted Platform Module (TPM)
Controller: ST ST33TPM12LPC 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 RJ-45 LAN ports: Intel
®
i211AT supports 1000/100/10Mbps Gigabit/Fast
Ethernet with Wake-on-LAN and PXE Boot ROM.
Audio
HD audio compliant with Realtek ALC662.
Line-out and line-in/MIC-in via box header connector.
Expansion Interface
One full-size PCI-Express Mini Card socket complies with PCI-Express Mini Card
Spec. V1.2 but only support USB 2.0.
One full-size PCI-Express Mini Card Socket complies with PCI-Express Mini Card
Spec. V1.2.
Power Input
One 2x2-pin connector.
+10V~+24V DC-in.
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
Audio driver
XHCI driver
Trusted Execution Engine
Sideband Fabric Device
CAPA840/843 Capa Board
4 Introduction
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CAPA840/843 Capa Board
Board and Pin Assignments 5
Chapter 2
Board and Pin Assignments
2.1 Board Dimensions and Fixing Holes
Top View
CAPA840/843 Capa Board
6 Board and Pin Assignments
Bottom View
Side View
CAPA840/843 Capa Board
Board and Pin Assignments 7
2.2 Board Layout
Top View
Side View
CAPA840/843 Capa Board
8 Board and Pin Assignments
Bottom View
CAPA840/843 Capa Board
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
jumper 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 CAPA840/843 to meet your application 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
Setting
JP1
LVDS Brightness Control Mode Setting
Default: PWM Mode
1-2 Close
JP2
LVDS +3.3V/+5V Voltage Selection
Default: +3.3V
1-2 Close
JP3
LVDS +12V Voltage Selection
Default: None
None
JP4
Restore BIOS Optimal Defaults
Default: Normal Operation
1-2 Close
JP6
COM1 Data/Power Selection
Default: RS-232 Data
CN17 Pin 1: DCD
3-5 Close
CN17 Pin 8: RI
4-6 Close
JP7
Auto Power On
Default: Disable
1-2 Close
CAPA840/843 Capa Board
10 Board and Pin Assignments
2.3.1 LVDS Brightness Control Mode Setting (JP1)
This jumper enables you to select PWM or voltage control mode for inverter connector
(CN7). These two control modes are for adjusting the brightness of LVDS panel.
2.3.2 LVDS Voltage Selection (JP2 and JP3)
The board supports voltage selection for flat panel displays. Use these jumpers to set
LVDS connector (CN9) pin 1~6 VCCM to +3.3V, +5V or +12V. To prevent hardware
damage, before connecting please make sure that input voltage of the flat panel is
correct.
JP3
2.3.3 Restore BIOS Optimal Defaults (JP4)
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.
2.3.4 COM1 Data/Power Selection (JP6)
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. You can change the communication mode
(RS-232/422/485) via BIOS setting, see section 4.4.
Function
Setting
PWM mode (Default)
1-2 close
Voltage mode
2-3 close
Function
JP2 Setting
+3.3V level (Default)
1-2 close
+5V level
2-3 close
Function
JP3 Setting
+12V level
1-2 close
N/A
Open
Function
Setting
Normal (Default)
1-2 close
Restore BIOS optimal defaults
2-3 close
Function
Setting
Power: Set CN17 pin 1 to +5V level
1-3 close
Data: Set CN17 pin 1 to DCD (Default)
3-5 close
Power: Set CN17 pin 8 to +12V level
2-4 close
Data: Set CN17 pin 8 to RI (Default)
4-6 close
JP2
CAPA840/843 Capa Board
Board and Pin Assignments 11
2.3.5 Auto Power On (JP7)
If JP7 is enabled for AC power input, the system will be automatically power on without
pressing soft power button. If JP7 is disabled for AC power input, it is necessary to
manually press soft power button to power on the system.
Function
Setting
Disable auto power on (Default)
1-2 close
Enable auto power on
2-3 close
CAPA840/843 Capa Board
12 Board and Pin Assignments
2.4 Connectors
Signals go to other parts of the system through connectors. Loose or improper connection
might cause problems, please make sure all connectors are properly and firmly connected.
Here is a summary table of connectors on the hardware.
Connector
Description
CN1
Digital I/O Connector
CN2
CPU Fan Connector
CN4
SATA Power Connector
CN6
Front Panel Connector
CN7
Inverter Connector
CN8
Internal USB 2.0 Port 1
CN9
LVDS Connector
CN10
Audio Connector
CN11
Ethernet Port 1 and 2
CN12
USB 2.0 Port 6 and 7
CN13
USB 3.0 Port 0 and USB 2.0 Port 2
CN14
HDMI Connector
CN15
SMBus Connector
CN16
VGA Connector
CN17
COM1 Connector
CN18
COM2 Connector
CN19
SATA Connector
CN20
ATX Power Connector
SCN1
PCI-Express Mini Card (USB) and mSATA Connector
SCN2
PCI-Express Mini Card Connector
SCN3
Channel 0 DDR3L SO-DIMM Socket
SCN4
Channel 1 DDR3L SO-DIMM Socket
SCN5
ZIO Expansion Connector
CAPA840/843 Capa Board
Board and Pin Assignments 13
2.4.1 Digital I/O Connector (CN1)
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.
2.4.2 CPU Fan Connector (CN2)
This is a3-pin p=2.54mm wafer connector which is compliant with Molex 5045, for fan
interface. Fan is needed for cooling down CPU temperature. You can find fan speed
within BIOS Setup Utility if fan is installed. For further information, see BIOS Setup Utility:
Advanced\H/W Monitor\PC Health Status (see section 4.4).
2.4.3 SATA Power Connector (CN4)
This is a, 4-pin p=2.5mm wafer connector which is compliant with JST B4B-XH-K-S for
interfacing to SATA 2.5" HDD power supply.
Pin
Signal
Pin
Signal
1
Digital Input 0
2
Digital Output 4
3
Digital Input 1
4
Digital Output 3
5
Digital Input 2
6
Digital Output 2
7
Digital Output 0
8
Digital Output 1
9
+5V level
10
GND
Pin
Signal
1
GND
2
+12V level
3
Fan speed feedback
Pin
Signal
1
+12V level
2
GND
3
GND
4
+5V level
CAPA840/843 Capa Board
14 Board and Pin Assignments
2.4.4 Front Panel Connector (CN6)
Power LED
Pin 1 connects anode(+) of LED and pin 5 connects 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
connecting 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 panel 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 that 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 control panel. 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
PWRSW-
10
PWRSW+
11
HW RST-
12
HW RST+
13
HDDLED-
14
HDDLED+
CAPA840/843 Capa Board
Board and Pin Assignments 15
2.4.5 Inverter Connector (CN7)
This is a 8-pin connector which is compliant with DF13-8S-1.25C for inverter. We
strongly recommend you to use the matching DF13-8S-1.25C connector to avoid
malfunction.
2.4.6 Internal USB 2.0 Port (CN8)
This is a 4-pin p=1.25mm wafer connector which is compliant with Molex 53047-0419 for
USB 2.0 port 1.
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
USB3_PWR23
2
D2+ 3 D2- 4 GND
1
CAPA840/843 Capa Board
16 Board and Pin Assignments
2.4.7 LVDS Connector (CN9)
This board has a 2x20-pin connector for LVDS LCD interface. It is strongly
recommended to use the matching JST SHDR-40VS-B connector for LVDS interface.
Pin 1~6 VCCM can be set to +3.3V, +5V or +12V by setting JP2 or JP3 (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 CLK-
37
Channel A D2+
38
Channel A CLK+
39
GND
40
GND
CAPA840/843 Capa Board
Board and Pin Assignments 17
24-bit single channel 18-bit dual channel
24-bit dual 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
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
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
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 CLK-
37
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
7
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
CAPA840/843 Capa Board
18 Board and Pin Assignments
2.4.8 Audio Connector (CN10)
This is a 10-pin p=2.0mm box header which is compliant with Molex 78046-102 for audio
interface.
2.4.9 Ethernet Port (CN11)
The board has dual RJ-45 connector. 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.
Ethernet 2 Ethernet 1
2.4.10 USB Ports (CN12 and CN13)
These are CN12 (for USB 2.0 port 6 and 7) and CN13 (for USB 3.0 port 0 and USB 2.0
port 2) connectors on the rear I/O. They are commonly used for installing USB
peripherals such as keyboard, mouse, scanner, etc.
CN12
1 2 3 4
5 6 7 8
CN13
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
Pin
Signal
Pin
Signal
L1
MDI0+
L5
MDI2+
L2
MDI0-
L6
MDI2-
L3
MDI1+
L7
MDI3+
L4
MDI1-
L8
MDI3-
A
1000 LAN LED (Orange) / 100 LAN LED
(Green)
B
Active LED (Yellow)
Pin
Signal
Pin
Signal
1
USB VCC
(+5V level)
5
USB VCC
(+5V level)
2
USB #4_D-
6
USB #5_D-
3
USB #4_D+
7
USB #5_D+
4
GND
8
GND
Pin
Signal
Pin
Signal
1
USB VCC
(+5V level)
8
USB #0_RXN
2
USB #3_D-
9
USB #0_RXP
3
USB #3_D+
10
USB VCC
(+5V level)
4
GND
11
USB #6_D-
5
USB #0_RXN
12
USB #6_D+
6
USB #0_RXP
13
GND
7
GND
CAPA840/843 Capa Board
Board and Pin Assignments 19
2.4.11 HDMI Connector (CN14)
The HDMI (High-Definition Multimedia Interface) is a compact digital interface which is
capable of transmitting high-definition video and high-resolution audio over a single
cable. Its interface is available through connector CN14.
2.4.12 SMBus Connector (CN15)
This connector is a 3-pin p=2.0mm wafer connector which is compliant with JST
B3B-PH-K-S for SMBus interface. The SMBus (System Management Bus) is a simple
2-wire bus for the purpose of lightweight communication.
2.4.13 VGA Connector (CN16)
This is a 15-pin D-Sub connector which is commonly used for VGA display. This VGA
interface configuration can be configured via software utility.
Pin
Signal
Pin
Signal
1
HDMI DATA2+
2
GND
3
HDMI DATA2-
4
HDMI DATA1+
5
GND
6
HDMI DATA1-
7
HDMI DATA0+
8
GND
9
HDMI DATA0-
10
HDMI Clock+
11
GND
12
HDMI Clock-
13
N.C.
14
N.C.
15
HDMI SCL
16
HDMI SDA
17
GND
18
+5V
19
HDMI_HTPLG
Pin
Signal
1
CLK 2 DATA
3
GND
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
CAPA840/843 Capa Board
20 Board and Pin Assignments
2.4.14 COM Connectors (CN17 and CN18)
These are 10-pin p=2.0mm box headers which is compliant with Molex 78046-102 for
COM1 (CN17) and COM2 (CN18). Only COM1 is equipped with +5V level power
capability on DCD and +12V level on RI by setting JP6 (see section 2.3.4). Also only
COM1 supports RS-232/422/485 communication mode, see pin assignments given in
table below. If you need COM1 to support RS-422 or RS-485, please refer to BIOS
setting in section 4.4.
COM1 (RS-232/422/485):
CN17
COM2 (RS-232 only):
CN18
2.4.15 SATA Connector (CN19)
This Serial Advanced Technology Attachment (Serial ATA or SATA) connector is for
high-speed SATA interface. It is a computer bus interface for connecting to devices such
as hard disk drive.
Pin
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
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
Pin
Signal
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD 6 CTS 7 DTR 8 RI 9 GND
10
N.C.
Pin
Signal
1
GND
2
SATA_TX+
3
SATA_TX-
4
GND
5
SATA_RX-
6
SATA_RX+
7
GND
CAPA840/843 Capa Board
Board and Pin Assignments 21
2.4.16 ATX Power Connector (CN20)
Steady and sufficient power can be supplied to all components on the board by
connecting the power connector. Please make sure all components and devices are
properly installed before connecting the power connector.
The CN20 is a 4-pin power supply interface. External power supply plug fits into CN20 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 PCI-Express Mini Card (USB) and mSATA Connector
(SCN1)
This is a PCI-Express Mini Card connector on the bottom side applying to only USB 2.0
and SATA (mSATA). It also complies with PCI-Express Mini Card Spec. V1.2.
Pin
Signal
1
GND
2
GND
3
+12V~+24V
4
+12V~+24V
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
SATA_RXP
24
+3.3VSB
25
SATA_RXN
26
GND
27
GND
28
+1.5V
29
GND
30
SMB_CLK
31
SATA_TXN
32
SMB_DATA
33
SATA_TXP
34
GND
35
GND
36
USB #4_D-
37
GND
38
USB #4_D+
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
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22 Board and Pin Assignments
2.4.18 PCI-Express Mini Card Connector (SCN2)
This is a PCI-Express Mini Card connector on the bottom side applying to either
PCI-Express or USB 2.0. It complies with PCI-Express Mini Card Spec. V1.2.
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_RXN
24
+3.3VSB
25
PE_RXP
26
GND
27
GND
28
+1.5V
29
GND
30
SMB_CLK
31
PE_TXN
32
SMB_DATA
33
PE_TXP
34
GND
35
GND
36
USB #5_D-
37
GND
38
USB #5_D+
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
CAPA840/843 Capa Board
Board and Pin Assignments 23
2.4.19 ZIO Expansion Connector (SCN5)
The board is equipped with SCN5 on the bottom side for connecting CPU board to a ZIO
module.
Pin
Signal
Pin
Signal
A1
+12V
B1
GND
A2
+5VSB
B2
GND
A3
+5VSB
B3
GND
A4
+3.3VSB
B4
GND
A5
+3.3VSB
B5
RSVD
A6
RSVD
B6
RSVD
A7
PWROK
B7
RSVD
A8
SMB_CLK
B8
RSVD
A9
SMB_DATA
B9
GND
A10
GND
B10
PCI-E TXP4
A11
PCI-E RXP4
B11
PCI-E TXN4
A12
PCI-E RXN4
B12
WAKE_N
A13
USBOC_N
B13
PCI-E CLKP
A14
USB #7_D+
B14
PCI-E CLKN
A15
USB #7_D-
B15
GND
A16
No Use
B16
CLK_33M
A17
No Use
B17
SERIRQ
A18
GND
B18
LAD0
A19
No Use
B19
LAD1
A20
No Use
B20
LAD2
A21
PLTRST_N
B21
LAD3
A22
No Use
B22
L_FRAME
A23
No Use
B23
GND
A24
GND
B24
No Use
A25
No Use
B25
No Use
A26
No Use
B26
No Use
A27
No Use
B27
No Use
A28
No Use
B28
GND
A29
GND
B29
No Use
A30
No Use
B30
No Use
CAPA840/843 Capa Board
24 Board and Pin Assignments
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CAPA840/843 Capa Board
Hardware Description 25
Chapter 3
Hardware Description
3.1 Microprocessors
The CAPA840 supports Intel® AtomTM E3845/E3827 processors and CAPA843 supports Intel®
Celeron® J1900 processors, which enable your system to operate under Windows® 7 and
Windows® 8 environments. The system performance depends on the microprocessor. Make
sure all correct settings are arranged for your installed microprocessor to prevent CPU from
damages.
3.2 BIOS
The CAPA840/843 uses AMI Plug and Play BIOS with a single 64Mbit SPI Flash.
3.3 System Memory
The CAPA840/843 supports two 204-pin DDR3L SO-DIMM sockets for maximum memory
capacity up to 8GB DDR3L SDRAMs. The memory module comes in sizes of 1GB, 2GB, 4GB
and 8GB.
Note
Please install memory modules of the same size, chip width, density and rank.
Also it is a must to have SO-DIMM inserted in SCN3.
3.4 I/O Port Address Map
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26 Hardware Description
3.5 Interrupt Controller (IRQ) Map
The interrupt controller (IRQ) mapping list is shown as follows:
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Hardware Description 27
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28 Hardware Description
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Hardware Description 29
3.6 Memory Map
The memory mapping list is shown as follows:
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30 Hardware Description
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CAPA840/843 Capa Board
AMI BIOS Setup Utility 31
Chapter 4
AMI BIOS Setup Utility
The AMI UEFI BIOS provides users with a built-in setup program to modify basic system
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 setup screens from the main BIOS setup menu, such as the Advanced and Chipset
menus.
Note
If your computer cannot boot after making and saving system changes with BIOS
setup, you can restore BIOS optimal defaults by setting JP4 (see section 2.3.3).
It is strongly recommended that you should avoid changing the chipset’s defaults. Both AMI
and your 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 system called 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 differ from one screen to another.
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32 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.
F1
The <F1> key allows you to display the General Help screen.
F2
The <F2> key allows you to Load Previous Values.
F3
The <F3> key allows you to Load Optimized Defaults.
F4
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 change the setup option listed for a
particular setup item. The <Enter> key can also allow you to display the
setup sub- screens.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 33
4.3 Main Menu
When you first enter the setup utility, you will enter the Main setup screen. You can always
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.
BIOS Information
Display the auto-detected BIOS information.
System Language
Choose the system default language.
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.
Access Level
Display the access level of current user.
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34 AMI BIOS Setup Utility
4.4 Advanced Menu
The Advanced menu also allows users to set configuration 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:
► Trusted Computing
► ACPI Settings
► F81803 Super IO Configuration
► Hardware Monitor
► NCT6627UD Second Super IO Configuration (This option appears only if a ZIO
module with serial ports is connected)
► CPU Configuration
► IDE Configuration
► Miscellaneous Configuration
► USB Configuration
► Utility Configuration
For items marked with “”, please press <Enter> for more options.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 35
Trusted Computing
This screen provides function for specifying the TPM (Trusted Platform Module) settings.
Security Device Support
Enable or disable BIOS support for security device. The default setting is Disabled.
TPM State
Once the Security Device Support is Enabled, TPM can be used by the operating system.
Current Status Information
Display current TPM status information.
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36 AMI BIOS Setup Utility
ACPI Settings
You can use this screen to select options for the ACPI configuration, and change the value
of the selected option. A description of the selected item appears on the right side of the
screen.
ACPI Sleep State
Select the ACPI (Advanced Configuration and Power Interface) sleep state. Configuration
options are Suspend Disabled and S3 (Suspend to RAM). The default setting is S3
(Suspend to RAM); this option selects ACPI sleep state the system will enter when
suspend button is pressed.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 37
F81803 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 1~2 Configuration
Set parameters related to serial port 1~2.
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38 AMI BIOS Setup Utility
Serial Port 1 Configuration
Serial Port
Enable or disable serial port 1. The optimal setting for base I/O address is 3F8h and for
interrupt request address is IRQ4.
COM Port Type
Use this option to set RS-232/422/485 communication mode.
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AMI BIOS Setup Utility 39
Serial Port 2 Configuration
Serial Port
Enable or disable serial port 2. The optimal setting for base I/O address is 2F8h and for
interrupt request address is IRQ3.
Hardware Monitor
This screen monitors hardware health status.
This screen displays the temperature of system and CPU, system voltages (VCORE and
+5V).
CAPA840/843 Capa Board
40 AMI BIOS Setup Utility
NCT6627UD Second Super IO Configuration
This screen is available only if a ZIO module with serial ports is connected. You can use
this screen to select options for the Second 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 1~2 Configuration
Set parameters related to serial port 1~2 on I/O board.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 41
Serial Port 1 Configuration
Serial Port
Enable or disable serial port 1 on I/O board. The optimal setting for base I/O address is
3E8h and for interrupt request address is IRQ11.
Serial Port 2 Configuration
Serial Port
Enable or disable serial port 2 on I/O board. The optimal setting for base I/O address is
2E8h and for interrupt request address is IRQ10.
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42 AMI BIOS Setup Utility
CPU Configuration
This screen shows the CPU Configuration, and you can change the value of the selected
option.
Socket 0 CPU Information
This item is for socket specific CPU information.
Intel Virtualization Technology
Enable or disable Intel Virtualization Technology. When enabled, a VMM (Virtual Machine
Mode) can utilize the additional hardware capabilities. It allows a platform to run multiple
operating systems and applications independently, hence enabling a computer system to
work as several virtual systems.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 43
Socket 0 CPU Information
This screen shows CPU Information.
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44 AMI BIOS Setup Utility
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.
Serial-ATA (SATA)
Enable or disable the SATA Controller feature. The default is Enabled.
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AMI BIOS Setup Utility 45
SATA Mode
SATA Mode
Determine how SATA controller(s) operate. Operation mode options are IDE Mode and
AHCI (Advanced Host Controller Interface) Mode. The default is AHCI Mode.
Serial ATA Port 0
Serial-ATA Port 0
Enable or disable the onboard SATA port 0 which is CN19 (see section 2.4.15).
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46 AMI BIOS Setup Utility
Serial ATA Port 1
Serial-ATA Port 1
Enable or disable the onboard SATA port 1 which is SCN1 (see section 2.4.17).
CAPA840/843 Capa Board
AMI BIOS Setup Utility 47
Miscellaneous Configuration
OS Selection
Use this item to select Windows® 8.x or Windows® 7 operating system. The default is
Windows® 8.x.
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48 AMI BIOS Setup Utility
USB Configuration
USB Devices
Display all detected USB devices.
Legacy USB Support
Use this item to enable or disable support for USB device on legacy operating system. The
default setting is Enabled. Auto option disables legacy support if no USB devices are
connected. Disable option will keep USB devices available only for EFI applications.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 49
Utility Configuration
BIOS Flash Utility
BIOS flash utility configuration. For more detailed information, please refer to Appendix C.
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50 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 left frame of the screen to go to the sub menus:
► North Bridge
► South Bridge
For items marked with “”, please press <Enter> for more options.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 51
North Bridge
This screen shows system memory information and allows users to configure parameters
of North Bridge chipset.
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52 AMI BIOS Setup Utility
LVDS Panel Type
Select LVDS panel resolution.
South Bridge
This screen allows users to configure parameters of South Bridge chipset.
USB Configuration
This item is for USB configuration settings.
Audio Controller
Control detection of the audio device.
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AMI BIOS Setup Utility 53
South Bridge – USB Configuration
XHCI Mode
When Advanced\Miscellaneous Configuration\OS Selection is set to Windows® 8.x, XHCI
mode is Enabled.
Meanwhile, when Advanced\Miscellaneous Configuration\OS Selection is set to Windows®
7, XHCI mode is Smart Auto.
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54 AMI BIOS Setup Utility
Audio Controller
Audio Controller
Control detection of the audio device.
- Disabled: Audio device will be unconditionally disabled.
- Enabled: Audio device will be unconditionally enabled.
CAPA840/843 Capa Board
AMI BIOS Setup Utility 55
4.6 Security Menu
The Security menu allows users to change the security settings for the system.
Administrator Password
Set administrator password.
User Password
Set user password.
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56 AMI BIOS Setup Utility
4.7 Boot Menu
The Boot menu allows users to change boot options 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 keyboard NumLock.
Quiet Boot
Select to display either POST output messages or a splash screen during boot-up.
Legacy PXE OpROM
Use this item to enable or disable the boot ROM function of the onboard LAN chip when
the system boots 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 57
4.8 Save & Exit Menu
The Save & Exit menu allows users to load your system configuration 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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58 AMI BIOS Setup Utility
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.
Launch EFI Shell from filesystem device
Attempt to launch EFI Shell application (Shellx64.efi) from one of the available filesystem
devices.
CAPA840/843 Capa Board
Watchdog Timer 59
Appendix A
Watchdog Timer
A.1 About Watchdog Timer
Software stability is major issue in most application. Some embedded systems are not
watched by operator 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 triggers 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.
A.2 How to Use Watchdog Timer
The I/O port base addresses of watchdog timer are 2E (hex) and 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
watchdog timer with a value bigger 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
Next
Next
Next
Next
Begin
Enable and Initialize
Watchdog Timer
Program “A”
Reset Watchdog
Timer
Next
Next
Next
Next
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60 Watchdog Timer
A.3 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,07h
out dx,al
;Enable WDT base address:
mov dx,2Eh
mov al,30h
out dx,al
mov dx,2Fh
mov al,01h
out dx,al
;Activate WDT:
mov dx,2Eh
mov al,0F0h
out dx,al
mov dx,2Fh
mov al,80h
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
Note
below)
;Set Second or Minute :
mov dx,2Eh
mov al,0F5h
out dx,al
mov dx,2Fh
mov al,Nh ;N=71h or 79h(see
Note
below)
out dx,al
Note:
If N=71h, 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 61
If N=79h, 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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62 Watchdog Timer
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CAPA840/843 Capa Board
Digital I/O 63
Appendix B
Digital I/O
B.1 About Digital I/O
The digital I/O on CPU board has 8 bits. Each bit can be set to function as input or output by
software 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
1.
CN1
B.2 Digital I/O Programming
I
2
C to GPIO PCA9554PW GPIO.
I
2
C address: 01001000.
Command byte
Command
Protocol
Function
0
Read byte
Input port register
1
Read/write byte
Output port register
2
Read/write byte
Polarity inversion register
3
Read/write byte
Configuration register
The command byte is the first byte to follow the address byte during a write transmission. It is
used as a pointer to determine which of the following registers will be written or read.
Pin
Signal
Pin
Signal
1
DI0 2 DO4 3 DI1 4 DO3
5
DI2 6 DO2
7
DO0 8 DO1
9
GND
10
+5V level
CAPA840/843 Capa Board
64 Digital I/O
Register 0: Input port register.
This register is a read-only port. It reflects the incoming logic levels of the pins, regardless of
whether the pin is defined as an input or an output by Register 3. Writes to this register have
no effect.
The default “X” is determined by the externally applied logic level, normally “1” when no
external signal externally applied because of the internal pull-up resistors.
Register 0 – Input port register bit description
Bit
Symbol
Access
Value
Description
7
I7
Read only
X
Determined by externally applied
logic level.
6
I6
Read only
X 5 I5
Read only
X 4 I4
Read only
X 3 I3
Read only
X 2 I2
Read only
X 1 I1
Read only
X 0 I0
Read only
X
Register 1: Output port register.
This register reflects the outgoing logic levels of the pins defined as outputs by Register 3. Bit
values in this register have no effect on pins defined as inputs. Reads from this register return
the value that is in the flip-flop controlling the output selection, not the actual pin value.
Register 1 – Output port register bit description
Bit
Symbol
Access
Default Value
Description
7
O7 R 1
Reflects outgoing logic levels of pins defined as
outputs by Register 3.
6
O6 R 1 5 O5 R 1 4 O4 R 1 3 O3 R 1 2 O2 R 1 1 O1 R 1 0 O0 R 1
Register 2: Polarity Inversion register.
This register allows the user to invert the polarity of the Input port register data. If a bit in this
register is set (written with “1”), the corresponding Input port data is inverted. If a bit in this
register is cleared (written with “0”), the Input port data polarity is retained.
Register 2 – Polarity inversion register bit description
Bit
Symbol
Access
Default Value
Description
7
N7
R/W
0
Inverts polarity of Input port register data.
0 = Input port register data retained (default
value).
1 = Input port register data inverted.
6
N6
R/W
0
5
N5
R/W 0 4
N4
R/W 0 3
N3
R/W
0
2
N2
R/W
0
1
N1
R/W 0 0
N0
R/W
0
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Digital I/O 65
Register 3: Configuration register.
This register configures the directions of the I/O pins. If a bit in this register is set, the
corresponding port pin is enabled as an input with high-impedance output driver. If a bit in this
register is cleared, the corresponding port pin is enabled as an output. At reset, the I/Os are
configured as inputs with a weak pull-up to VDD.
Register 3 – Configuration register bit description
Bit
Symbol
Access
Default Value
Description
7
C7
R/W
1
Configures the directions of the I/O pins.
0 = Corresponding port pin enabled as an output.
1 = Corresponding port pin configured as input
(default value).
6
C6
R/W
1
5
C5
R/W 1 4
C4
R/W 1 3
C3
R/W 1 2
C2
R/W 1 1
C1
R/W
1
0
C0
R/W
1
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66 Digital I/O
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BIOS Flash Utility 67
Appendix C
BIOS Flash Utility
The BIOS Flash utility is a new helpful function in BIOS setup program. With this function you
can easily update system BIOS without having to enter operating system. In this appendix you
may learn how to do it in just a few steps. Please read and follow the instructions below
carefully.
1. In your USB flash drive, create a new folder and name it “Axiomtek”, see figure below.
2. Copy BIOS ROM file (e.g. CAPA843X.008) to “Axiomtek” folder.
3. Insert the USB flash drive to your system.
4. Enter BIOS setup menu and go to Advanced\Utility Configuration. Select BIOS Flash
Utility and press <Enter>.
CAPA843X.008
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68 BIOS Flash Utility
5. BIOS automatically detect all USB drive(s) attached to the system. In this example only
one USB drive is attached to the system. That’s why, you can see only one device is
displayed in figure below.
6. Select the USB drive containing BIOS ROM file you want to update using the <> or
<> key. Then press <Enter> to get into “Axiomtek” folder.
7. Now you can see the BIOS ROM file on the screen, press <Enter> to select.
8. Select Start to flash system BIOS option to begin updating procedure.
CAPA843X.008
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BIOS Flash Utility 69
9. Please wait while BIOS completes the entire flash update process: erase data, write new
data and verify data.
10. When you see the following figure, press <Enter> to finish the update process. After that
the system will shut down and restart immediately.
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70 BIOS Flash Utility
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Windows® 7 Installation Guide 71
Appendix D
Window® 7 Installation Guide
Before you install Windows® 7, please follow the instructions below:
1. Enter BIOS setup utility, and ensure that Advanced\Miscellaneous Configuration\OS
Selection option is set to Windows® 7 (see section 4.4).
2. After that, go to Chipset\South Bridge to verify that XHCI Mode is Smart Auto.
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72 Windows® 7 Installation Guide
3. Save changes and exit BIOS utility.
4. Reboot and you may begin to install Windows® 7 on your computer. But please note that
during installation, only USB ports at CN13 can be used.
5. After Windows® 7 installation is complete, install XHCI driver
(Intel_USB_3.0_xHC_Driver_3.0.4.65_MR4_PV) from the product information CD. After
installing driver, all USB ports can work properly.
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