Page 1
IMB502
Intel® Socket 1151 Core
TM
i7/ i5/ i3
Processors ATX Industrial
Motherboard
User’s Manual
Page 2
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 2018 Axiomtek Co., Ltd.
All Rights Reserved
October 2018, Version A4
Printed in Taiwan
Page 3
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.
Intel® and Celeron® are trademarks of Intel Corporation.
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.
Other brand names and trademarks are the properties and registered brands of their
respective owners.
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iv
Table of Contents
Disclaimers ...................................................................................................... ii
ESD Precautions ............................................................................................. iii
Chapter 1 Introduction ............................................. 1
1.1 Features ................................................................................................ 2
1.2 Specifications ........................................................................................ 2
Chapter 2 Board and Pin Assignments .................... 5
2.1 Board Layout ......................................................................................... 5
2.2 Rear I/O ................................................................................................. 6
2.3 Jumper Settings .................................................................................... 7
2.3.1 Clear CMOS (JP1) ...................................................................................... 8
2.3.2 AT/ATX Mode Select (JP2) .......................................................................... 8
2.3.3 COM1 Mode Select (JP3, JP5, JP6) ........................................................... 9
2.3.4 COM1 Data/Power Select (JP4) ................................................................. 9
2.3.5 COM2 Data/Power Select (JP8) ................................................................. 9
2.4 Connectors .......................................................................................... 10
2.4.1 mSATA Slot (CN4) (Optional) ..................................................................... 11
2.4.2 Front Panel Header (CN5) ........................................................................ 12
2.4.3 GPIO Header (CN6) .................................................................................. 12
2.4.4 COM1 Connector (CN9) ............................................................................ 13
2.4.5 LAN and USB 3.0 Connectors (CN11 and CN12) ..................................... 14
2.4.6 Audio Jack (CN13) .................................................................................... 14
2.4.7 Front Audio Header (CN14) ...................................................................... 15
2.4.8 COM Headers (CN15~CN18 and CN44) .................................................. 15
2.4.9 HDMI Connector (CN20) ........................................................................... 16
2.4.10 Internal USB Headers (CN23~CN24) ....................................................... 16
2.4.11 SATA 3.0 Connectors (CN26~CN30) ........................................................ 17
2.4.12 SMBus Header (CN31) ............................................................................. 17
2.4.13 Voltage Monitor Header (CN32) ................................................................ 17
2.4.14 Power Input Connectors (CN33 and CN34) .............................................. 18
2.4.15 PCI-Express x4 Slots (CN39, CN40 and CN46) ...................................... 19
2.4.16 Fan Connectors (CN41~CN43) ................................................................. 20
2.4.17 Internal USB 3.0 Connector (CN47).......................................................... 21
2.4.18 VGA and DVI-D Connector (CN50) ........................................................... 22
Chapter 3 Hardware Description ........................... 23
3.1 Microprocessors .................................................................................. 23
3.2 BIOS.................................................................................................... 23
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v
3.3 System Memory .................................................................................. 23
Chapter 4 AMI BIOS Setup Utility .......................... 25
4.1 Starting ................................................................................................ 25
4.2 Navigation Keys .................................................................................. 25
4.3 Main Menu .......................................................................................... 27
4.4 Advanced Menu .................................................................................. 28
4.5 Chipset Menu ...................................................................................... 44
4.6 Security Menu ..................................................................................... 53
4.7 Boot Menu ................................ ................................ ........................... 54
4.8 Save & Exit Menu ................................................................................ 55
Appendix A Watchdog Timer ................................... 57
A.1 About Watchdog Timer ........................................................................ 57
A.2 Sample Program ................................................................................. 57
Appendix B BIOS Flash Utility ................................ 59
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IMB502 LGA1151 ATX Motherboard
Introduction 1
Chapter 1
Introduction
The IMB502 is an advanced ATX industrial motherboard based on the 7th / 6th Generation
Intel® Core™ i7/ i5/ i3/ Pentium® and Celeron® processors (Kabylake-S / Skylake-S) in
LGA1151 Socket with Intel® Q170. The optimized IMB502 is specially designed for better
computing and visual performance; ideally used in every major industry for tasks ranging from
financial modeling to designing complex buildings and vehicles. With its built-in Intel® HD
Graphics 530/510, this industrial grade motherboard delivers great 3D visual performance with
triple display capability through DVI-D, HDMI and VGA ports demanded by professional-grade
CAD and media/entertainment fields.
In addition, the IMB502 supports Intel® Turbo Boost 2.0 technology, Intel® Hyper-Threading
technology, Intel® HD Graphics with DX11 support, 3-D Tri-Gate transistors, 64GB DDR4
2133/1866MHz memory, and PCI-Express 3.0 x16 slot. It also features Intel® Active
Management Technology 9.0 (iAMT), SATA RAID, as well as PCI-Express x4 expansion
making it ideal for applications with added security features.
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IMB502 LGA1151 ATX Motherboard
2 Introduction
1.1 Features
LGA1151 Socket 7
th/6th
Generation Intel® Core™ i7/i5/i3, Pentium® and Celeron®
processors (Kabylake-S/Skylake-S) up to 65W
4 DDR4 2133/1866MHz DIMM with maximum capacity up to 64GB (max. 16GB per slot)
DVI-D, HDMI, and VGA with triple view supported
5 SATA-600 RAID 0/1/5/10
4 USB 3.0 and 8 USB 2.0 ports
mSATA supported
PCI-Express Mini Card
1.2 Specifications
CPU
LGA1151 Socket 6
th
Generation Intel® Core™ i7/ i5/ i3, Pentium® and Celeron®
processors.
Chipset
Intel
®
Q170.
BIOS
AMI BIOS.
System Memory
Four 288-pin DIMM sockets.
Maximum up to 64GB DDR4 memory (max. 16GB per slot).
Support 2133/1866MHz.
Onboard Multi I/O
One PS/2 keyboard and mouse.
Six serial ports:
- Five RS-232 (internal box headers).
- One RS-232/422/485 (rear I/O).
USB Interface
Four USB 3.0 ports.
Eight USB 2.0 ports.
Ethernet
LAN1: 1000/100/10Mbps Gigabit/Fast Ethernet supports Wake-on-LAN, PXE Boot
ROM, iAMT with Intel® i219LM.
LAN2: 1000/100/10Mbps Gigabit/Fast Ethernet supports Wake-on-LAN, PXE Boot
ROM with Intel® i210AT.
Serial ATA
Five SATA-600 with RAID 0/1/5/10.
One mSATA.(Optional)
Audio
Realtek ALC662 5.1 channel HDA Codec.
Support MIC-in/line-in/line-out.
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IMB502 LGA1151 ATX Motherboard
Introduction 3
Display
One 15-pin D-Sub as VGA connector. Resolution max. up to 1920x1200 @60Hz.
One HDMI 1.4b with resolution max. up to 4096x2160 @24Hz.
One DVI-D with resolution max. up to 1920×1200 @60Hz.
Expansion Interface
One PCI-Express x16 slot.
Three PCI-Express x4 slots.
There PCI slots.
Power Input
One ATX power input connector.
One 12V ATX power input connector for CPU Power.
Operating Temperature
0°C ~ 60°C.
Storage Temperature
-20°C ~ 75°C.
Form Factor
305 x 244mm.
Note
All specifications and images are subject to change without notice.
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IMB502 LGA1151 ATX Motherboard
4 Introduction
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 5
Chapter 2
Board and Pin Assignments
2.1 Board Layout
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IMB502 LGA1151 ATX Motherboard
6 Board and Pin Assignments
2.2 Rear I/O
Jumpers/Headers/Connectors
1
Internal USB Headers (CN23~CN24)
18
PCI Slots (CN36~CN38)
2
GPIO Header (CN6)
19
mSATA Slot (CN4)
3
Debug Header
20
SATA 3.0 Connectors (CN26~CN30)
4
COM3~COM6 Headers (CN15~CN18)
21
ATX1 Power Input Connector (CN34)
5
AT/ATX Mode Select Jumper (JP2)
22
DIMM Sockets (DIMM1~DIMM4)
6
Front Panel Header (CN5)
23
USB3.0 Box header (CN47)
7
SMBus Header (CN31)
24
CPU Socket
8
System Fan Connectors (CN42, CN43)
25
ATX2 CPU Power Input Connector (CN33)
9
Voltage Monitor Header (CN32)
26
PCI-Express x4 Slots (CN39, CN40, CN46)
10
CPU Fan Connector (CN41)
27
PCI-Express x16 Slot (CN1)
11
COM2 Header (CN44)
31
PS/2 Keyboard and Mouse Connector +
USB 2.0 2 Ports (CN48)
12
COM2 Data/Power Select Jumper (JP8)
32
DVI-D + VGA Connector (CN50)
13
COM1 Mode Select Jumper-1 (JP3)
33
COM1 Connector (CN9)
14
COM1 Mode Select Jumpers-2 (JP5, JP6)
34
LAN1 and LAN2 Connectors (CN11, CN12)
15
COM1 Data/Power Select Jumper (JP4)
35
Audio Jack (CN13)
16
Front Audio Header (CN14)
36
HDMI Connector (CN20)
17
Clear CMOS Jumper (JP1)
37
USB 3.0 Connectors (CN11, CN12)
Note
A direct contact CPU cooler back plate is not available for IMB502.
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 7
Note
To identify the first pin of a header or jumper, please refer to the following
information:
Usually, there is a thick line or a triangle near the header or jumper pin 1.
Square pad, which you can find on the back of the motherboard, is usually
used for pin 1.
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. The following
illustration shows how to set up jumper.
Before applying power to IMB502 Series, please make sure all of the jumpers are in factory
default position. 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
Clear CMOS
Default: Normal Operation
1-2 Close
JP2
AT/ATX Power Mode Select
Default: ATX Mode
1-2 Close
JP3
COM1 RS-232/422/485 Mode Select
Default: RS-232
1-2 Close
JP5
3-5, 4-6 Close
JP6
3-5, 4-6 Close
JP4/8
COM1/2 Data/Power Select
Default: RS-232 Data
3-5 Close
4-6 Close
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IMB502 LGA1151 ATX Motherboard
8 Board and Pin Assignments
2.3.1 Clear CMOS (JP1)
This jumper (3x1-pin p=2.54mm) allows you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system setup parameters by
erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM
data in CMOS, which includes system setup information such as system passwords.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the onboard battery.
3. Move the jumper clip from pins 1-2 (default) to pins 2-3. Keep the clip on pins 2-3
for about 5~10 seconds, then move the clip back to pins 1-2.
4. Re-install the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter
data.
2.3.2 AT/ATX Mode Select (JP2)
This 3x1-pin p=2.00mm jumper allows you to select AT or ATX power mode.
Function
Setting
Normal operation (Default)
1-2 close
Clear CMOS
2-3 close
Function
Setting
ATX mode (Default)
1-2 close
AT mode
2-3 close
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 9
2.3.3 COM1 Mode Select (JP3, JP5, JP6)
Use these jumpers (3x2-pin p=2.54mm) to set COM1 port to operate in RS-232, RS-422
or RS-485 communication mode.
JP3 JP5 JP6
2.3.4 COM1 Data/Power Select (JP4)
The COM1 port has +5V power capability on DCD# and +12V on RI# by setting this
jumper (3x2-pin p=2.54mm).
2.3.5 COM2 Data/Power Select (JP8)
The COM2 port has +5V power capability on DCD# and +12V on RI# by setting this
jumper (3x2-pin p=2.54mm).
Function
Setting
RS-232 mode
(Default)
JP3 1-2 close
JP5 3-5, 4-6 close
JP6 3-5, 4-6 close
RS-422 mode
JP3 3-4 close
JP5 1-3, 2-4 close
JP6 1-3, 2-4 close
RS-485 mode
JP3 5-6 close
JP5 1-3, 2-4 close
JP6 1-3, 2-4 clos
Function
Setting
Power: Set COM1 pin 1 to +5V
1-3 close
Data: Set COM1 pin 1 to DCD# (Default)
3-5 close
Power: Set COM1 pin 9 to +12V
2-4 close
Data: Set COM1 pin 9 to RI# (Default)
4-6 close
Function
Setting
Power: Set COM2 pin 1 to +5V
1-3 close
Data: Set COM2 pin 1 to DCD# (Default)
3-5 close
Power: Set COM2 pin 8 to +12V
2-4 close
Data: Set COM2 pin 8 to RI# (Default)
4-6 close
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IMB502 LGA1151 ATX Motherboard
10 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 showing connectors on the hardware.
Connector
Description
CN1
PCI-Express x16 Slot
CN4
mSATA Slot (optional)
CN5
Front Panel Header
CN6
GPIO Header
CN9
COM1 Connector
CN11, CN12
LAN and USB 3.0 Connectors
CN13
Audio Jack
CN14
Front Audio Header
CN15~CN18, CN44
COM Headers
CN20
HDMI Connector
CN23~CN24
Internal USB Headers
CN26~CN30
SATA 3.0 Connectors
CN31
SMBus Header
CN32
Voltage Monitor Header
CN33
ATX2 CPU Power Input Connector
CN34
ATX1 24-pin Power Input Connector
CN36~CN38
PCI Slots
CN39, CN40, CN46
PCI-Express x4 Slots
CN41
CPU Fan Connector
CN42~CN43
System Fan Connectors
CN47
USB 3.0 Box header for 2 ports
CN48
PS/2 and USB 2.0 2 ports
CN49
USB 2.0 Type-A 180D Connector
CN50
DVI-D & VGA Connector
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 11
2.4.1 mSATA Slot (CN4) (Optional)
Note
Screw type is M2*0.4.
Pin
Signal
Pin
Signal
1
N/C 2 +3.3V_DUAL
3
N/C 4 GND
5
N/C 6 +1.5V
7
N/C 8 N/C 9 GND
10
N/C
11
N/C
12
N/C
13
N/C
14
N/C
15
GND
16
N/C
17
N/C
18
GND
19
N/C
20
N/C
21
GND
22
BUF_PLT_RST_N
23
SATA0_RX_DP
24
+3.3V_DUAL
25
SATA0_RX_DN
26
GND
27
GND
28
+1.5V
29
GND
30
SMB_CLK_RESUME
31
SATA0_TX_DN
32
SMB_DATA_RESUME
33
SATA0_TX_DP
34
GND
35
GND
36
USB9-
37
GND
38
USB9+
39
+3.3V_DUAL
40
GND
41
+3.3V_DUAL
42
N/C
43
GND
44
N/C
45
N/C
46
N/C
47
N/C
48
+1.5V
49
N/C
50
GND
51
N/C
52
+3.3V_DUAL
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IMB502 LGA1151 ATX Motherboard
12 Board and Pin Assignments
2.4.2 Front Panel Header (CN5)
This is front panel header (7x2-pin p=2.54mm).
Note
[*]
: The buzzer on motherboard will be active when pin 2 and pin 4 is
connected; the external speaker on chassis will be active when pin 2 and
pin 4 is open.
2.4.3 GPIO Header (CN6)
This header (5x2-pin p=2.00mm) is for digital I/O interface.
Note
[*]
: “H” or “L” means the default voltage is High or Low level, and GPIO
output is 5V. The GPI or GPO and High or Low level can be selected with
BIOS setting.
Pin
Signal
1
Power LED+
2
SPK-
[*]
3
GND
4
BUZZER
5
Power LED-
6
N/C 7 N/C 8 SPK+
[*]
9
PWR-
10
PWR+
11
RESET-
12
RESET+
13
HD LED-
14
HD LED+
Pin
Signal
Pin
Signal
1
SIO_GPO74
(0xA06 Bit4, H)
[*]
2
SIO_GPO70
(0xA06 Bit0, H)
3
SIO_GPO75
(0xA06 Bit5, H)
4
SIO_GPO71
(0xA06 Bit1, H)
5
SIO_GPO76
(0xA06 Bit6, H)
6
SIO_GPO72
(0xA06 Bit2, H)
7
SIO_GPO77
(0xA06 Bit7, H)
8
SIO_GPO73
(0xA06 Bit3, H)
9
GND
10
GND
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 13
2.4.4 COM1 Connector (CN9)
This is a high rise 9-pin D-Sub connector for COM1 serial port interface. The pin
assignments of RS-232/422/485 are listed in table below.
Note
[*]
: Signals of COM1 can be RS-232/422/485 by selecting JP3, JP5 and JP6
(see section 2.3.3).
[**]
: Pin 1 of COM1 can be DCD/+5V and pin 9 of COM1 can be RI/+12V by
selecting JP4 (see section 2.3.4).
Pin
RS-232
[*]
RS-422
[*]
RS-485
[*]
1
DCD#
[**]
TX-
485- 2 RXD
TX+
485+
3
TXD
RX+
N/C 4 DTR#
RX-
N/C 5 GND
GND
GND
6
DSR#
N/C
N/C 7 RTS#
N/C
N/C 8 CTS#
N/C
N/C 9 RI#
[**]
N/C
N/C
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IMB502 LGA1151 ATX Motherboard
14 Board and Pin Assignments
LAN
USB
2.4.5 LAN and USB 3.0 Connectors (CN11 and CN12)
The motherboard comes with two high performance plug and play Ethernet interfaces
(RJ-45) which are fully compliant with the IEEE 802.3 standard. Connection can be
established by plugging one end of the Ethernet cable into this RJ-45 connector and the
other end to a 1000/100/10 Base-T hub.
The Universal Serial Bus (compliant with USB 3.0) connectors on the rear I/O are for
installing USB peripherals such as keyboard, mouse, scanner, etc.
Note
Speed LED turns orange for 1000Mbps or green for 100Mbps. The
light is off for 10Mbps.
CN11 supports AMT when chipset is customized into Intel
®
Q170.
Both CN11 and CN12 support Wake-on-LAN.
2.4.6 Audio Jack (CN13)
Install audio driver, and then attach audio devices to CN5.
Pin
LAN Signal
Pin
LAN Signal
L1
Tx+ (Data
transmission positive)
L2
Tx- (Data transmission
negative)
L3
Rx+ (Data reception
positive)
L4
RJ-1 (For 1000 Base-T
only)
L5
RJ-1 (For 1000
Base-T only)
L6
Rx- (Data reception
negative)
L7
RJ-1 (For 1000
Base-T only)
L8
RJ-1 (For 1000 Base-T
only)
A
Active LED
B
Speed LED
Pin
USB Signal
Pin
USB Signal
1
USB3_POWER
2
USB -
3
USB +
4
GND
5
USB3_SSRX
6
USB3_SSRX+
7
GND
8
USB3_SSTX
9
USB3_SSTX+
Pin Color
Signal
Blue
Line-in
Green
Line-out
Pink
MIC-in
Page 21
IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 15
2.4.7 Front Audio Header (CN14)
This is front audio header (5x2-pin p=2.00mm) for convenient connection and control of
audio devices.
2.4.8 COM Headers (CN15~CN18 and CN44)
The motherboard comes with 5x2-pin p=2.54mm headers for COM3~COM6 and COM2
serial port interfaces.
COM3~COM6:
CN15~CN18
COM2:
CN44
Note
[*]
: Pin 1 of COM2 can be DCD/+5V and pin 8 of COM2 can be RI/+12V by
selecting JP8 (see section 2.3.6).
Pin
Signal
Pin
Signal
1
MIC_IN
2
GND
3
LINE_IN_L
4
GND
5
LINE_IN_R
6
GND
7
AUD_OUT_L
8
GND
9
AUD_OUT_R
10
GND
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
Pin
Signal
1
DCD#
[*]
2
DSR#
3
RXD
4
RTS#
5
TXD 6 CTS#
7
DTR#
8
RI#
[*]
9
GND
10
N/C
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IMB502 LGA1151 ATX Motherboard
16 Board and Pin Assignments
2.4.9 HDMI Connector (CN20)
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.
2.4.10 Internal USB Headers (CN23~CN24)
These are 5x2-pin p=2.54mm headers for USB 2.0 interface.
Pin
Signal
Pin
Signal
1
DATA2+
2
GND
3
DATA2-
4
DATA1+
5
GND
6
DATA1-
7
DATA0+
8
GND
9
DATA0-
10
Clock+
11
GND
12
Clock-
13
N/C
14
GND
15
SCL
16
SDA
17
GND
18
+5V
19
HPD
Pin
Signal
Pin
Signal
1
+5 V_DUAL
2
+5 V_DUAL
3
USB5/7/11/13-
4
USB6/8/12/14-
5
USB5/7/11/13+
6
USB6/8/12/14+
7
GND
8
GND
10
N/C
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 17
2.4.11 SATA 3.0 Connectors (CN26~CN30)
These Serial Advanced Technology Attachment (Serial ATA or SATA) connectors are for
SATA 3.0 interface allowing up to 6.0Gb/s data transfer rate. It is a computer bus
interface for connecting to devices such as hard disk drive.
2.4.12 SMBus Header (CN31)
The CN31 (5x1-pin p=2.00mm) is for SMBus (System Management Bus) interface.
2.4.13 Voltage Monitor Header (CN32)
The CN32 (8x1-pin p=2.54mm) is for voltage monitoring only. It doesn’t supply power.
Pin
Signal
1
GND
2
SATA_TX+
3
SATA_TX-
4
GND
5
SATA_RX-
6
SATA_RX+
7
GND
Pin
Signal
Pin
Signal
1
SMB_SCL
2
N/C 3 GND
4
SMB_SDA
5
+5V
Pin
Signal
Pin
Signal
1
GND
2
GND
3
VCC5_SB
4
+3.3V
5
-5V 6 +5V 7 -12V
8
+12V
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IMB502 LGA1151 ATX Motherboard
18 Board and Pin Assignments
2.4.14 Power Input Connectors (CN33 and CN34)
Steady and sufficient power can be supplied to all components on the motherboard by
connecting power connector. Please make sure all components and devices are
properly installed before connecting the power connector.
External power supply plug fits into this connector 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.
ATX2 CPU power input connector:
ATX1 24-pin power input connector:
Pin
CN33 Signal
Pin
CN33 Signal
1
GND
5
+12V
2
GND
6
+12V
3
GND
7
+12V
4
GND
8
+12V
Pin
CN34 Signal
Pin
CN34 Signal
1
3.3V
13
3.3V 2 3.3V
14
-12V
3
GND
15
GND
4
+5V
16
PS_ON
5
GND
17
GND
6
+5V
18
GND
7
GND
19
GND
8
PWR OK
20
-5V 9 5VSB
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
3.3V
24
GND
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 19
2.4.15 PCI-Express x4 Slots (CN39, CN40 and CN46)
This motherboard has two PCI-Express x4 slots.
Pin
Signal
Pin
Signal
B1
+12V_PS
A1
GND
B2
+12V_PS
A2
+12V_PS
B3
+12V_PS
A3
+12V_PS
B4
GND
A4
GND
B5
SMB_CLK_RESUME
A5
N/C
B6
SMB_DATA_RESUME
A6
N/C
B7
GND
A7
N/C
B8
+3.3V_PS
A8
N/C
B9
N/C
A9
+3.3V_PS
B10
+3.3V_SB
A10
+3.3V_PS
B11
PCH_WAKE_N
A11
PWRGD
B12
N/C
A12
GND
B13
GND
A13
CLKOUT_PCIE_P5
B14
PCIE1_SLOT1_TX_DP_C
A14
CLKOUT_PCIE_N5
B15
PCIE1_SLOT1_TX_DN_C
A15
GND
B16
GND
A16
PCIE1_SLOT1_RX_DP_C
B17
PCIEX4_SLOT1_PRSNT2_N
A17
PCIE1_SLOT1_RX_DN_C
B18
GND
A18
GND
B19
PCIE2_TX_DP
A19
N/C
B20
PCIE2_TX_DN
A20
GND
B21
GND
A21
PCIE2_RX_DP
B22
GND
A22
PCIE2_RX_DN
B23
PCIE3_TX_DP
A23
GND
B24
PCIE3_TX_DN
A24
GND
B25
GND
A25
PCIE3_RX_DP
B26
GND
A26
PCIE3_RX_DN
B27
PCIE4_TX_DP
A27
GND
B28
PCIE4_TX_DN
A28
GND
B29
GND
A29
PCIE4_RX_DP
B30
N/C
A30
PCIE4_RX_DN
B31
N/C
A31
GND
B32
GND
A32
N/C
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IMB502 LGA1151 ATX Motherboard
20 Board and Pin Assignments
2.4.16 Fan Connectors (CN41~CN43)
This motherboard has three fan connectors. Find fan speed option(s) at BIOS Setup
Utility: Advanced\HW Monitor\PC Health Status.
The CN41 (4x1-pin p=2.54mm) is for CPU fan connector.
The CN42 and CN43 (4x1-pin p=2.54mm) are for system fan connectors.
Pin
Signal
1
GND
2
+12V
3
FAN Speed Detection
4
FAN Speed Control
Pin
Signal
1
GND
2
+12V
3
FAN Speed Detection
4
FAN Speed Control
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IMB502 LGA1151 ATX Motherboard
Board and Pin Assignments 21
2.4.17 Internal USB 3.0 Connector (CN47)
The CN47 is a 19-pin internal connector for installing versatile USB 3.0 compliant
peripherals.
Pin
Signal
Pin
Signal
1
VBUS0
2
SSRX3-
19
VBUS1
3
SSRX3+
18
SSRX4-
4
GND
17
SSRX4+
5
SSTX3-
16
GND
6
SSTX3+
15
SSTX4-
7
GND
14
SSTX4+
8
USB6-
13
GND
9
USB6+
12
USB7-
10
ID
11
USB7+
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22 Board and Pin Assignments
2.4.18 VGA and DVI-D Connector (CN50)
CN50 is a double-deck connector comprising an lower connector for VGA port and a
upper connector for DVI-D port.
This is a high rise DVI-D connector provides transmission of fast and high quality video
signal between source device (graphic card) and display device (monitor).
The 15-pin D-Sub connector which is commonly used for VGA display. This VGA
interface configuration can be configured via software utility.
Pin
CN3B Signal
Pin
CN3B Signal
1
TX2-
2
TX2+
3
Ground
4
NC 5 NC 6 DVI_SPD_CLK
7
DVI_SPD DATA
8
CRT-VSYNC
9
TX1-
10
TX1+
11
Ground
12
NC
13
NC
14
VGAVCC
15
Ground
16
FPDETECT
17
TX0-
18
TX0+
19
Ground
20
NC
21
NC
22
Ground
23
TXC+
24
TXC-
C1
CRT-RED
C2
CRT-GREEN
C3
CRT-BLUE
C4
CRT-HSYNC
C5
VGAGND
Pin
Signal
Pin
Signal
1
Red 2 Green
3
Blue 4 NC 5 GND
6
DETECT
7
GND
8
GND
9
VCC
10
GND
11
NC
12
DDC DATA
13
Horizontal Sync
14
Vertical Sync
15
DDC CLK
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IMB502 LGA1151 ATX Motherboard
Hardware Description 23
Chapter 3
Hardware Description
3.1 Microprocessors
The IMB502 Series supports Intel® Core™ i7/ i5/ i3, Pentium® and Celeron® processors, which
enable your system to operate under Windows® 7 32/64-bit, Windows® 8.1, Windows® 10 and
Linux 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 IMB502 Series uses AMI Plug and Play BIOS.
3.3 System Memory
The IMB502 supports four 288-pin DDR4 DIMM sockets for maximum memory capacity up to
64GB DDR4 SDRAMs. The memory module comes in sizes of 2GB, 4GB, 8GB and 16GB.
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24 Hardware Description
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AMI BIOS Setup Utility 25
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 <Del> during the Power On Self Test (POST) to enter
BIOS setup, otherwise, POST will continue with its test routines.
2. Once you enter the BIOS, 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 JP1 (see section 2.3.1).
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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26 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.
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.
+ Plus/Minus
The Plus and Minus <Arrow> keys allow you to change the field value of a
particular setup item.
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.
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AMI BIOS Setup Utility 27
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 BIOS information.
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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28 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:
► ACPI Settings
► AMT configuration
► CPU Configuration
► CSM Configuration
► FAN Function
► Hardware Monitor
► IT8786 GPIO Configuration
► IT8786 Super IO Configuration
► PCH-FW configuration
► PCI Subsystem Settings
► Platform Misc Configuration
► Sata Configuration
► Serial Port Configuration
► USB Configuration
► Utility Configuration
For items marked with “”, please press <Enter> for more options.
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AMI BIOS Setup Utility 29
ACPI Settings
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 is S3 (Suspend to
RAM); this option selects ACPI sleep state the system will enter when suspend button is
pressed.
AMT Configuration
Use this screen to configure AMT parameters.
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30 AMI BIOS Setup Utility
AMT BIOS Features
Enable or disable Active Management Technology BIOS features. The default is Enabled.
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AMI BIOS Setup Utility 31
CPU Configuration
This screen shows CPU information, and you can change the value of the selected option.
Hyper-threading
Enable or disable Hyper-threading Technology, which allows a single physical processor to
multitask as multiple logical processors. When disabled, only one thread per enabled core
is enabled.
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 single computer
system to work as several virtual systems.
Hardware Prefetcher
To turn on/off the MLC streamer prefetcher.
Adjacent Cache Line Prefetch
To turn on/off prefetching of adjacent cache lines.
Active Processor Cores
Number of cores to enable in each processor package.
AES
Enabled / Disable AES (Advanced Encryption Standard)
Boot performance mode
Select the performance state that the BIOS will set starting from reset vector.
Intel (R) SpeedStep(tm)
Allows more than two frequency ranges to be supported.
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32 AMI BIOS Setup Utility
Turbo Mode
Enable/Disable processor Turbo Mode (requires EMTTM enabled too). AUTO means
enabled, unless max turbo ratio is bigger than 16 - SKL A0 W/A.
C states
Enable/Disable CPU Power Management. Allows CPU to go to C states when it's not
100% utilized.
CSM Configuration
This screen displays CSM information.
CSM Support
Enabled / Disable CSM Support.
GateA20 Active
UPON REQUEST - GA20 can be disabled using BIOS services. ALWAYS - do not allow
disabling GA20; this option is useful when any RT code is executed above 1MB.
Option ROM Messages
Set display mode for Option ROM.
INT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM: IMMEDIATE - execute the trap right
away; POSTPONED - execute the trap during legacy boot.
Boot option filter
This option controls Legacy/UEFI ROMs priority.
Storage
Controls the execution of UEFI and Legacy Storage OpROM
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AMI BIOS Setup Utility 33
Video
Controls the execution of UEFI and Legacy Video OpROM.
Other PCI devices
Determines OpROM execution policy for devices other than Network, Storage, or Video.
Fan Function
This screen allows you to select CPU and system fan mode.
CPU_Fan1/Smart Fan 2/Smart Fan 3 Mode
These items allow you to select CPU and system fans mode, which can be set to Full on,
Manual and Automatic Mode.
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34 AMI BIOS Setup Utility
Hardware Monitor
This screen monitors hardware health status.
This screen displays the temperature of system and CPU, cooling fans speed in RPM and
system voltages (VCC_CPU, DDR, +12V, +5V and +3.3V).
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AMI BIOS Setup Utility 35
IT8786 GPIO Configuration
You can use this screen to set input/output and high/low for each port.
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36 AMI BIOS Setup Utility
IT8786 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 1~6 Configuration
Use these items to set parameters related to serial port 1~6.
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AMI BIOS Setup Utility 37
PCH-FW Configuration
This screen displays ME Firmware information.
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38 AMI BIOS Setup Utility
PCI Subsystem settings
This screen allows you to set PCI Subsystem mode.
PCI Latency Timer
Value to be programmed into PCI Latency Timer Register.
VGA Palette Snoop
Enables or Disables VGA Palette Registers Snooping.
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AMI BIOS Setup Utility 39
Platform Mics Configuration
This screen allows you to set Platform Mics Configuration.
Native PCIE Enable
Bit - PCIe Native * control\n 0 - ~ Hot Plug\n 1 - SHPC Native Hot Plug control\n 2 - ~
Power Management Events\n 3 - PCIe Advanced Error Reporting control\n 4 - PCIe
Capability Structure control\n 5 - Latency Tolerance Reporting control.
Native ASPM
Enabled - OS Controlled ASPM, Disabled - BIOS Controlled ASPM.
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40 AMI BIOS Setup Utility
SATA Configuration
During system boot up, the BIOS automatically detects the presence of SATA devices. In
the SATA Configuration menu, you can see the currently installed hardware in the SATA
ports.
SATA Controller(s)
Enable or disable the SATA Controller feature. The default is Enabled.
SATA Mode Selection
Determine how SATA controller(s) operate. Operation mode options are RAID and AHCI
(Advanced Host Controller Interface) Mode. The default is AHCI Mode.
SATA Controller Speed
Indicates the maximum speed the SATA controller can support.
Hot Plug
Designates this port as Hot Pluggable.
Spin Up Device
If enabled for any of ports Staggerred Spin Up will be performed and only the drives which
have this option enabled will spin up at boot. Otherwise all drives spin up at boot..
SATA Device Type
Identify the SATA port is connected to Solid State Drive or Hard Disk Drive
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AMI BIOS Setup Utility 41
Serial Port Configuration
This screen allows you to set Serial Port Configuration.
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42 AMI BIOS Setup Utility
USB Configuration
USB Devices
Display all detected USB devices.
Legacy USB Support
Enables Legacy USB support. AUTO option disables legacy support if no USB devices are
connected.
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off support. The XHCI ownership
change should be claimed by XHCI driver.
USB Mass Storage Driver Support
Enable/Disable USB Mass Storage Driver Support.
USB transfer time-out
The time-out value for Control, Bulk, and Interrupt transfers.
Device reset time-out
USB mass storage device Start Unit command time-out.
Device power-up delay
Maximum time the device will take before it properly reports itself to the Host Controller.
'Auto' uses default value: for a Root port it is 100 ms, for a Hub port the delay is taken from
Hub descriptor.
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AMI BIOS Setup Utility 43
Utility Configuration
BIOS Flash Utility
BIOS flash utility configuration. For more detailed information, please refer to Appendix B.
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IMB502 LGA1151 ATX Motherboard
44 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:
► System Agent (SA) Configuration
► PCH-IO Configuration
For items marked with “”, please press <Enter> for more options.
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AMI BIOS Setup Utility 45
System Agent (SA) Configuration
This screen allows users to configure System Agent (SA) parameters. For items marked
with “”, please press <Enter> for more options.
Graphics Configuration
Open sub menu for parameters related to graphics configuration.
Memory Configuration
Open sub menu for information related to system memory.
PEG Port Configuration
Open sub menu for parameters related to graphics configuration.
VT-d
VT-d capability.
Above 4GB MMIO BIOS assignment
Enable/Disable above 4GB Memory MappedIO BIOS assignment\n\nThis is enabled
automatically when Aperture Size is set to 2048MB.
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46 AMI BIOS Setup Utility
Graphics Configuration
Primary IGFX Boot Display
Select the video device which will be activated during POST (Power-On Self Test). The
default is Auto.
Internal Graphics
Keep IGFX enabled based on the setup options.
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AMI BIOS Setup Utility 47
Memory Configuration
This screen shows system memory information.
PEG Port Configuration
This screen shows PEG Port/POE Port feature information.
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48 AMI BIOS Setup Utility
Max Link Speed
Configure PEG 0:1:0 Max Speed.
Detect Non-Compliance Device
Detect Non-Compliance PCI Express Device in PEG.
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AMI BIOS Setup Utility 49
PCH-IO Configuration
This screen allows you to set PCH parameters.
PCH LAN Controller
Enable or disable onboard PCH LAN controller.
Wake on LAN Enable
Enable or disable integrated LAN to wake the system.
Restore AC Power Loss
Specify what state to go to when power is re-applied after a power failure (G3 state).
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50 AMI BIOS Setup Utility
USB Configuration
This screen shows USB configuration.
XHCI Disable Compliance Mode
Options to disable Compliance Mode. Default is FALSE to not disable Compliance Mode.
Set TRUE to disable Compliance Mode.
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AMI BIOS Setup Utility 51
PCI Express Configuration
This screen shows PCI Express configuration.
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52 AMI BIOS Setup Utility
PCIe Speed
Configure PCIe Speed.
ASPM
Set the ASPM Level:\nForce L0s - Force all links to L0s State\nAUTO - BIOS auto
configure\nDISABLE - Disables ASPM.
Detect Non-Compliance Device
Detect Non-Compliance PCI Express Device. If enable, it will take more time at POST
time.
HD Audio Configuration
This screen shows HD Audio information
.
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AMI BIOS Setup Utility 53
4.6 Security Menu
The Security menu allows users to change the security 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 a user password has been set (installed or uninstalled).
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54 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.
Launch PXE OpROM policy
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 55
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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56 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.
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Watchdog Timer 57
Appendix A
Watchdog Timer
A.1 About Watchdog Timer
Software stability is major issue in most application. 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 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 Sample Program
1. Enter ADU, and press <F4> to select the superior ITE
2. PORT setting 002E, 002F
3. Address 07h setting 07 GPIO
4. Address 72h to set the countdown, for example Sec: C0, Min: 40
5. Address 73h set the countdown time, for example 10sec: 0A
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58 Watchdog Timer
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BIOS Flash Utility 59
Appendix B
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. IMB502.005) 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>.
IMB502.005
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60 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.
IMB500.005
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BIOS Flash Utility 61
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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