AXIOMTEK KIWI310 User manual

KIWI310
Intel®Celeron®N3350 Processor
1.8” 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 2021 Axiomtek Co., Ltd.
All Rights Reserved
September 2021, Version A1
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.
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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Table of Contents
Disclaimers.....................................................................................................ii
ESD Precautions ...........................................................................................iii
Section 1 Introduction............................................. 1
1.1 Features ...............................................................................................1
1.2 Specifications......................................................................................2
1.3 Utilities .................................................................................................3
Section 2 Board and Pin Assignments.................... 5
2.1 Board Dimensions and Fixing Holes .................................................5
2.2 Board Layout .......................................................................................7
2.3 Assembly Drawing ..............................................................................9
2.4 Switch Settings .................................................................................10
2.4.1 Auto Power On and Restore BIOS Optimal Defaults (SW1) .................... 10
2.5 Connectors ........................................................................................11
2.5.1 40-pin GPIO Header (CN1)....................................................................... 12
2.5.2 POE Header (CN2) ................................................................................... 12
2.5.3 Ethernet Port (CN3)................................................................................... 13
2.5.4 USB 3.2 Port (CN4)................................................................................... 13
2.5.5 M.2 2230 Key E Connector (CN5) ............................................................ 14
2.5.6 USB 2.0 Port (CN6)................................................................................... 15
2.5.7 Power Connector (CN7)............................................................................ 15
2.5.8 Micro HDMI Connector (CN8) ................................................................... 16
2.5.9 Power and Reset Button (CN9)................................................................. 16
2.5.10 CMOS Battery Connector (BAT1) ............................................................. 16
Section 3 Hardware Description ........................... 17
3.1 Microprocessors ...............................................................................17
3.2 BIOS ...................................................................................................17
3.3 System Memory.................................................................................17
3.4 I/O Port Address Map........................................................................18
3.5 Interrupt Controller (IRQ) Map .........................................................19
3.6 Memory Map ......................................................................................24
Section 4 AMI BIOS Setup Utility.......................... 25
4.1 Starting...............................................................................................25

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4.2 Navigation Keys ................................................................................25
4.3 Main Menu..........................................................................................27
4.4 Advanced Menu.................................................................................28
4.5 Chipset Menu.....................................................................................33
4.6 Security Menu....................................................................................36
4.7 Boot Menu..........................................................................................39
4.8 Save & Exit Menu ..............................................................................41
Appendix A Watchdog Timer................................... 43
A.1 About Watchdog Timer .....................................................................43
A.2 How to Use Watchdog Timer............................................................43
A.3 Sample Program................................................................................44

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KIWI310 1.8” Board
Introduction 1
Section 1
Introduction
The KIWI310 is a credit card size board with Intel® Celeron® N3350 processor that deliver
outstanding system performance through high-bandwidth interfaces, multiple I/O functions for
interactive applications and various embedded computing solutions.
The board is equipped with 2GB/4GB LPDDR4 RAM and 32GB/64GB eMMC. It also features
one Gigabit/Fast Ethernet, two USB 3.2 Gen1x1 and two USB 2.0 high speed compliant, one
M.2 Key E with USB and PCIe (transfer rates up to 5GT/s), and built-in one micro HDMI that
can achieve the space required and reliability for industrial applications. Additionally, it
provides user with 40-pin General Purpose bus which provides freedom for makers to build up
their shield. There are more interfaces available, such as GPIO, UART, I2C, and SPI. And its
1.8” form factor is suitable for an extensive array of PC peripherals. The board can be
enhanced by its built-in watchdog timer function, a special industrial feature not commonly
seen on other motherboards.
1.1 Features
⚫Intel® Celeron® dual core N3350 processor (1.1GHz)
⚫Solider LPDDR4 supports up to 4GB memory capacity
⚫32GB/64GB eMMC
⚫2 USB 3.2 Gen1x1 ports and 2 USB 2.0 ports
⚫1 Gigabit Ethernet ports
⚫1 M.2 Key E for WiFi/BT or AI Movidius
⚫40-pin General Purpose bus supported

KIWI310 1.8” Board
2Introduction
1.2 Specifications
⚫CPU
◼Intel®Celeron®dual core N3350 processor (1.1GHz).
⚫Thermal Solution
◼Fanless heatsink.
⚫Operating Temperature
◼0°C~+60°C
⚫BIOS
◼American Megatrends Inc. UEFI (Unified Extensible Firmware Interface) BIOS.
◼128Mbit SPI Flash, DMI, Plug and Play.
◼PXE Ethernet Boot ROM.
⚫System Memory
◼Onboard LPDDR4 .
◼Maximum up to 4GB LPDDR4 2400MHz memory.
⚫USB Interface
◼Two USB 3.2 Gen1x1 ports in type A on the rear I/O.
◼Two USB 2.0 ports in type A on the rear I/O.
⚫Display
◼One 4K/2K micro HDMI.
⚫Ethernet
◼One 1000/100/10Mbps Gigabit/Fast Ethernet port in RJ-45 connector.
◼Support Wake-on-LAN, PXE Boot ROM with Realtek RTL8111G.
⚫Storage
◼Onboard eMMC up to 64GB.
⚫Expansion Interface
◼One M.2 2230 Key E.
◼40-pin General Purpose bus with GPIO, UART, I2C, SPI and PWM included.
⚫Watchdog Timer
◼1~255 seconds or minutes; up to 255 levels.

KIWI310 1.8” Board
Introduction 3
⚫Power Input
◼One USB type C connector.
◼+9 ~ +20V DC-In @ 3A.
◼Required PD support power adapter or power bank.
◼Auto power on function supported.
⚫Power Management
◼ACPI (Advanced Configuration and Power Interface).
⚫Form Factor
◼1.8” form factor.
Note
All specifications and images are subject to change without notice.
1.3 Utilities
⚫Chipset and graphics driver
⚫Ethernet driver
⚫TXE driver

KIWI310 1.8” Board
4Introduction
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KIWI310 1.8” Board
Board and Pin Assignments 5
Section 2
Board and Pin Assignments
2.1 Board Dimensions and Fixing Holes
Top View

KIWI310 1.8” Board
6Board and Pin Assignments
Bottom View

KIWI310 1.8” Board
Board and Pin Assignments 7
2.2 Board Layout
Top View
Side View

KIWI310 1.8” Board
8Board and Pin Assignments
Bottom View

KIWI310 1.8” Board
Board and Pin Assignments 9
2.3 Assembly Drawing
For thermal dissipation, a heatsink enables the KIWI310’s components to dissipate heat
efficiently. All heat generating components are thermally conducted to the heatsink in order to
avoid hot spots. Images below illustrate how to install the thermal solution on KIWI310.

KIWI310 1.8” Board
10 Board and Pin Assignments
2.4 Switch Settings
Properly configure switch setting on the KIWI310 to meet your application purpose. Below you
can find a summary table of onboard default settings.
Note
Once the default switch setting needs to be changed, please do it under power-off
condition.
Switch
Description
Setting
SW1
Auto Power On
Default: Enable
SW1-1 ON
Restore BIOS Optimal Defaults
Default: Normal Operation
SW1-2 OFF
2.4.1 Auto Power On and Restore BIOS Optimal Defaults (SW1)
If dip1 of SW1 (SW1-1) is set to ON position, the system will be automatically power on
without pressing soft power button. If set to OFF position, it is necessary to manually
press soft power button to power on the system.
The dip2 of SW1 (SW1-2) is for restoring BIOS default status. Flip SW1-2 to ON position
for a few seconds then flip it back to OFF position. Doing this procedure can restore
BIOS optimal defaults.
Function
Setting
Disable auto power on
SW1-1 OFF
Enable auto power on (Default)
SW1-1 ON
Normal Operation (Default)
SW1-2 OFF
Restore BIOS optimal defaults
SW1-2 ON

KIWI310 1.8” Board
Board and Pin Assignments 11
2.5 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
40-pin GPIO Header
CN2
POE Header
CN3
Ethernet Port
CN4
USB 3.2 Port 1 and 2
CN5
M.2 2230 Key E Connector
CN6
USB 2.0 Port 1 and 2
CN7
Power Connector
CN8
Micro HDMI Connector
CN9
Power and Reset Button
BAT1
CMOS Battery Connector

KIWI310 1.8” Board
12 Board and Pin Assignments
2.5.1 40-pin GPIO Header (CN1)
This is a 40-pin (pitch=2.54mm) header.
2.5.2 POE Header (CN2)
The CN2 is a 2x2-pin header (pitch=2.54mm) for connecting to a separate POE HAT
interface.
Pin
Signal
Pin
Signal
1
+3.3V level
2
+5V level
3
I2C_SDA/GPIO2
4
+5V level
5
I2C_SCL/GPIO3
6
GND
7
GPIO4
8
UART_TX/GPIO14
9
GND
10
UART_RX/GPIO15
11
GPIO17
12
GPIO18
13
GPIO27
14
GND
15
GPIO22
16
GPIO23
17
+3.3V level
18
GPIO24
19
SPI_MOSI/GPIO10
20
GND
21
SPI_MISO/GPIO9
22
GPIO25
23
SPI_SCK/GPIO11
24
SPI_CS0/GPIO8
25
GND
26
SPI_CS1/GPIO7
27
GPIO0
28
GPIO1
29
GPIO5
30
GND
31
GPIO6
32
PWM0/GPIO12
33
PWM1/GPIO13
34
GND
35
GPIO19
36
GPIO16
37
GPIO26
38
GPIO20
39
GND
40
GPIO21
Pin
Signal
Pin
Signal
1
CT2
2
CT1
3
CT4
4
CT3

KIWI310 1.8” Board
Board and Pin Assignments 13
2.5.3 Ethernet Port (CN3)
Connection can be established by plugging one end of the Ethernet cable into the RJ-45
connector and the other end (phone jack) to a 1000/100/10-Base-T hub.
L1L2L3L4L5L6L7L8
A B
A B
2.5.4 USB 3.2 Port (CN4)
The Universal Serial Bus (compliant with USB 3.2 Gen1x1 (5Gb/s)) connector on the
rear I/O is for installing USB peripherals such as keyboard, mouse, scanner, etc.
Pin
1000
Base-T
100/10
Base-T
Description
L1
BI_DA+
TX+
Bidirectional or Transmit Data+
L2
BI_DA-
TX-
Bidirectional or Transmit Data-
L3
BI_DB+
RX+
Bidirectional or Receive Data+
L4
BI_DC+
N.C.
Bidirectional or Not Connected
L5
BI_DC-
N.C.
Bidirectional or Not Connected
L6
BI_DB-
RX-
Bidirectional or Receive Data-
L7
BI_DD+
N.C.
Bidirectional or Not Connected
L8
BI_DD-
N.C.
Bidirectional or Not Connected
A
Active Link LED
Off: No link
Blinking: Data activity detected
B
Speed LED
1000: Orange
100/10: Green/OFF
Pin
Signal
Pin
Signal
1
USB_VCC (+5V_SBY )
10
USB_VCC (+5V_SBY )
2
USB_DN1
11
USB_DN2
3
USB_DP1
12
USB_DP2
4
GND
13
GND
5
SSRX1_N
14
SSRX2_N
6
SSRX1_P
15
SSRX2_P
7
GND
16
GND
8
SSTX1_N
17
SSTX2_N
9
SSTX1_P
18
SSTX2_P

KIWI310 1.8” Board
14 Board and Pin Assignments
2.5.5 M.2 2230 Key E Connector (CN5)
The CN5 is a M.2 2230 Key E connector. It is suggested to install the M.2 wireless
module via PCIe x1 and USB 2.0 with 22mm width and 30mm length.
Pin
Signal
Pin
Signal
1
GND
2
+3.3V_SBY
3
USB_DP5
4
+3.3V_SBY
5
USB_DN5
6
N.C.
7
GND
8
N.C.
9
N.C.
10
N.C.
11
N.C.
12
N.C.
13
N.C.
14
N.C.
15
N.C.
16
N.C.
17
N.C.
18
GND
19
N.C.
20
N.C.
21
N.C.
22
N.C.
23
N.C.
24
Key E
25
Key E
26
27
28
29
30
31
32
N.C.
33
GND
34
N.C.
35
PCIE_TX_P
36
N.C.
37
PCIE_TX_N
38
N.C.
39
GND
40
N.C.
41
PCIE_RX_P
42
N.C.
43
PCIE_RX_N
44
N.C.
45
GND
46
N.C.
47
CLK_PCIE_P
48
N.C.
49
CLK_PCIE_N
50
SUSCLK(+3.3V Level)
51
GND
52
PERST#(+3.3V Level)
53
CLKREQ0#
54
W_DIS2#(+3.3V Level)
55
PEWAKE0#
56
W_DI12#(+3.3V Level)
57
GND
58
N.C.
59
N.C.
60
N.C.
61
N.C.
62
N.C.
63
GND
64
N.C.
65
N.C.
66
N.C.
67
N.C.
68
N.C.
69
GND
70
N.C.
71
N.C.
72
+3.3V_SBY
73
N.C.
74
+3.3V_SBY
75
GND