Maxtang BW-35 User manual

BW-35 Disk Size SBC Motherboard

Copyright
© 2021 Shenzhen Maxtang Computer Co., Ltd. All rights reserved. No part of this publication may be reproduced,
copied, stored in a retrieval system, translated into any language, or transmitted in any form or by any means,
electronic, mechanical, photocopying, or otherwise, without the prior written consent of Shenzhen Maxtang
Computer Co., Ltd (hereinafter referred to as “Maxtang”).
Disclaimer
Maxtang reserves the right to make changes and improvements to the products described in this document without
prior notice. Every effort has been made to ensure the information in the document is correct; however, Maxtang
does not guarantee this document is error-free.
Maxtang assumes no liability for incidental or consequential damages arising from misapplication or inability to use
the product or the information contained herein, nor for any infringements of rights of third parties, which may result
from its use.
Trademarks
All the trademarks, registrations, and brands mentioned herein are used for identification purposes only and may be
trademarks and/or registered trademarks of their respective owners.

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BW35 Motherboard
User Manual
(Version 1.0)
Version:
NO.
Description
Issue Date:
V1.0
Initial version (EN)
2020/07/24
Updated the USB ports to three USB3.0 and one USB2.0
2020/09/15
Updated to support 12V/19V DC-in power supply
2021/10/28

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Contents
Chapter 1 Product Introduction.......................................................... 3
1.1 Brief Introduction............................................................................................................3
1.2 Parameters......................................................................................................................3
1.3 Connector Diagram .........................................................................................................4
Chapter 2 Hardware............................................................................5
2.1 Jumper Setting ................................................................................................................5
2.2 Memory Slots..................................................................................................................5
2.3 Display Interfaces............................................................................................................5
2.4 Expansion (screen printing: M.2_E) ................................................................................7
2.5 Storage (screen printing: MSATA, SATA, PWSATA) ..........................................................7
2.6 USB Interface...................................................................................................................7
2.7 LAN..................................................................................................................................8
2.8 COM ................................................................................................................................8
2.9 Audio Interface................................................................................................................9
2.10 Power Supply (screen printing: PWR1, PWR2) .............................................................9
2.11 GPIO (screen printing: GPIO) ........................................................................................9
2.12 LPC...............................................................................................................................10
2.13 Switch Button/Indicator Pin (screen printing: JPOWER).............................................10
2.14 CPU FAN Socket (screen printing: CPU_FAN)..............................................................10
2.15 Hardware Auto Start (Screen Printing: JAT) .................................................................11
2.16 CMOS Clearance/Retention (screen printing: JCMOS) ...............................................11

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Chapter 1 Product Introduction
1.1 Brief Introduction
The BW35 motherboard is a 3.5" SBC (Single Board Computer) based on the Intel Haswell-U/Broadwell-U
platform, small formed, low power consumption, and high performance.
1.2 Parameters
Haswell-U:
⚫Intel Core i5-4200U — Dual Core Four Threads, Base Frequency 1.60GHz, Turbo Frequency 2.60GHz, TDP 15W,
Supports Enhanced Intel SpeedStep® Technology.
Broadwell-U:
⚫Intel Core i5-5200U — Dual Core Four Threads, Base Frequency 2.20GHz, Turbo Frequency 2.70GHz, TDP 15W
Supports Enhanced Intel SpeedStep® Technology.
⚫Intel Core i3-5005U — Dual Core Four Threads, Base Frequency 2.00GHz, TDP 15W, Supports Enhanced Intel
SpeedStep® Technology.
Memory: Single Channel SO-DIMM DDR3L, up to 8GB
GPU: Integrated Graphics based on CPU, Display via 1x HDMI,1x DP, 1xLVDS (eDP optional)
Storage: 1x mSATA3.0 interface (3G/4G Module optional), 1x SATA3.0
USB: 3xUSB3.2 Gen1, 3xUSB2.0(2*headers)
Ethernet: 2xGigabyte Intel Network Controllers
Audio: High-definition audio chip, supports Speaker-out, Mic-in, and power amplifier functions
Other I/O: 1xM.2 Key E (Type 2230, for Wi-Fi card and Bluetooth),1 set of LPC, 1 set of GPIO, 4xRS232, 2xRS485
Dimension: 146mm x 102mm (3.5")
Power: 12V/19V DC-in
Working Temperature: -20℃~60℃

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1.3 Connector Diagram
DC_IN
USB3.0
USB2.0
USB3.0
LAN2
LAN1
HDMI+DP
AUDIO
JAU
D
COM14
JPOWE
R
COM5_6
GPIO
USB2.0
EDP/LVD
S
LP
C
M.2_E
MSATA/3G/4G
SO-DIMM
L_VCC/ADJ
L_BKL
CPUFA
N
JAT
EDP_E
N
SAT
A
PWSAT
A
CLK_CMOS
CPU
SIM

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Chapter 2 Hardware
2.1 Jumper Setting
Please configure the jumpers according to your requirements before installing the hardware.
How to identify the first header of jumpers and pins: Observe the mark beside the jumper or pins and
find the header marked by “1” or bold line or triangular symbol. Or observe the rear panel and the header
with a square solder pad is the first header.
2.2 Memory Slots
1 x SO-DIMM DDR3L-1600MHz slot, maximum capacity 8GB.
2.3 Display Interfaces
The board features Integrated graphics, supports 1xHDMI1.4, 1xDP, 1x 24bit Dual Channel LVDs, and dual
independent display. The LVDs can be set as 2 lanes eDP, when it is configured as eDP the LVDs function will
be disabled.
2.3.1 LVDS (Screen printing: EDP/LVDS, L_BKL, L_VCC/ADJ, EDP_EN)
When it is configured as an LVDS function, the "EDP/LVDS" transmits LVDS signals. The "EDP_EN " is LVDS’
switch control jumper and the “L_VCC/ADJ” is for display working voltage and backlight adjustment. The LVDS'
display working voltage can be adjusted between 5V and 3V.
LVDS Data Pin (Screen printing: EDP/LVDS)
Signal
Pin
Signal
VCC
1
2
VCC
VCC
3
4
GND
GND
5
6
GND
A_DATA0_DN
7
8
A_DATA0_DP
A_DATA1_DN
9
10
A_DATA1_DP
A_DATA2_DN
11
12
A_DATA2_DP
GND
13
14
GND
A_CLK_DN
15
16
A_CLK_DP
A_DATA3_DN
17
18
A_DATA3_DP
B_DATA0_DN
19
20
B_DATA0_DP
B_DATA1_DN
21
22
B_DATA1_DP
B_DATA2_DN
23
24
B_DATA2_DP
GND
25
26
GND
B_CLK_DN
27
28
B_CLK_DP
B_DATA3_DN
29
30
B_DATA3_DP
EDP_EN (Screen printing: EDP_EN)
Setting
EDP_EN
Open
Turn off LVDS function

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Close
Turn on LVDS function
LVDS Backlight Adjustment Pin (Screen printing: L_BKL)
Pin
Signal
1
GND
2
GND
3
LCD_BKL_ADJ
4
LCD_BKL_ON
5
12V
6
12V
LVDS working voltage and backlight control pin (Screen printing: L_VCC/ADJ)
Pin
Setting
Function
1-3
Close
VCC(+3.3V)
3-5
Close
VCC(+5V)
2-4
Close
Backlight Control Standard
4-6
Close
Backlight Control Reverse
Note: Please do not short-circuit pins two or more different voltages at the same time.
2.3.2 eDP (Optional)
When it is set as eDP functions, the “EDP/LVDS” pin transmits the eDP signal. The "EDP_EN " is EDP’s
switch control jumper and the “L_VCC/ADJ” is for display working voltage and backlight adjustment. The
display working voltage can be adjusted between 5V and 3V.
eDP Data Pin (Screen Printing: EDP/LVDS)
Signal
Pin
Signal
VCC
1
2
VCC
VCC
3
4
EDP_HPD
GND
5
6
GND
EDP_AUXN
7
8
EDP_AUXP
N/A
9
10
N/A
EDP_DATA0_P
11
12
EDP_DATA0_N
GND
13
14
GND
N/A
15
16
N/A
EDP_DATA1_P
17
18
EDP_DATA1_N
N/A
19
20
N/A
N/A
21
22
N/A
N/A
23
24
N/A
GND
25
26
GND
N/A
27
28
N/A
N/A
29
30
N/A
EDP_EN (Screen printing: EDP_EN)
Setting
EDP_EN

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Open
Turn off eDP function
Close
Turn on eDP function
eDP Backlight Adjustment Pin (Screen printing: L_BKL)
Pin
Signal
1
GND
2
GND
3
LCD_BKL_ADJ
4
LCD_BKL_ON
5
12V
6
12V
eDP working voltage and backlight control pin (Screen printing: L_VCC/ADJ)
Pin
Setting
Function
1-3
Close
VCC(+3.3V)
3-5
Close
VCC(+5V)
2-4
Close
Backlight Control Standard
4-6
Close
Backlight Control Reverse
2.4 Expansion (screen printing: M.2_E)
Screen printing M.2_E: M.2 slots Key E, Supports 2230 WIFI Card with Bluetooth functions.
2.5 Storage (screen printing: MSATA, SATA, PWSATA)
Support 1x mSATA interface with Micro SIM, support 3G/4G module as an optional choice. 1x Standard
SATA3.0 interface. The “PWSATA” is the disk power supply interface of SATA (only applies to a 2.5-inch hard
drive).
PWSATA (Screen Printing: PWSATA)
Pin
Signal
1
5V
2
GND
3
GND
4
5V
2.6 USB Interface
3x standard USB3.0 rear ports, 1x standard USB2.0 rear port. (Screen printing: USB31, the top USB is
USB2.0 and bottom one is USB3.0). 2x USB2.0 header (2.0mm pitch pins).
USB2.0 Pin (screen printing: USB20)
Signal
Pin
Signal
VCC 5V
1
2
VCC 5V
USB DATA -
3
4
USB DATA-
USB DATA+
5
6
USB DATA+

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GND
7
8
GND
(N/A)
9
10
NC
2.7 LAN
The board provides two RJ45 high-performance Intel i211 Gigabit Ethernet controllers, supports Magic
packet wake-up. The LAN1 (i211) also supports PXE network boot.
LED Status Indicators:
LI_LED Status (Green)
Function
ACT_LED Status (Orange)
Function
Always on
Network Connected
Blink
Data transfer
2.8 COM
The board provides 4x RS232 and 2xRS485 on-board COM header (2.0mm spacing). The RS232 serial
ports are electrified, their voltage is the same as the input voltage of the board.
RS232 (screen printing: COM14)
Signal
Pin
Signal
DCD#
1
2
RXD
TXD
3
4
DTR#
GND
5
6
DSR#
RTS#
7
8
CTS#
RI#
9
10
VCC(same as the input voltage of the board)
DCD#
11
12
RXD
TXD
13
14
DTR#
GND
15
16
DSR#
RTS#
17
18
CTS#
RI#
19
20
VCC (same as the input voltage of the board)
DCD#
21
22
RXD
TXD
23
24
DTR#
GND
25
26
DSR#
RTS#
27
28
CTS#
RI#
29
30
VCC (same as the input voltage of the board)
DCD#
31
32
RXD
TXD
33
34
DTR#
GND
35
36
DSR#
RTS#
37
38
CTS#
RI#
39
40
VCC (same as the input voltage of the board)
RS485 (screen printing: COM5_6)
Signal
Pin
Signal

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COM5_DATA-
1
2
COM6_DATA-
COM5_DATA+
3
4
COM6_DATA+
GND
5
6
GND
2.9 Audio Interface
Realtek ALC662 HD audio chip equipped, provides a 3.5mm Line-out/MIC 2 in 1 combo jack (CTIA
American standard), and a built-in dual-channel power amplifier output socket for connecting passive
speakers.
Two-in-one headphone jack:
JAUD (screen printing: JAUD)
Pin
Signal
1
L+
2
L-
3
R-
4
R+
2.10 Power Supply (screen printing: PWR1, PWR2)
The board supports 12V/19V DC-in power supply.
PWR1:
PWR2 (screen printing: PWR2)
Pin
Signal
1
VIN
2
VIN
3
GND
4
GND
2.11 GPIO (screen printing: GPIO)
The board is equipped with 2x5Pin GPIO (2.0mm spacing), supports 8 programmable I/O lanes in total.
GPIO (screen printing: GPIO)
Signal
Pin
Signal
SIO_GP70
1
2
3.3V
SIO_GP71
3
4
SIO_GP74

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SIO_GP72
5
6
SIO_GP75
SIO_GP73
7
8
SIO_GP76
GND
9
10
SIO_GP77
2.12 LPC
The board provides a set of LPC pins (2.0mm spacing. Low Pin Count Interface) for connecting external
LPC devices as an optional feature.
LPC (screen printing: LPC)
Signal
Pin
Signal
L_FRAME_N
1
2
LPC_AD3
LPC_AD2
3
4
LPC_AD1
LPC_AD0
5
6
GND
PLTRST
7
8
CLK_LPC
3.3V
9
10
SERIRQ
2.13 Switch Button/Indicator Pin (screen printing: JPOWER)
A set of 2.0mm spacing pins that can be connected to a switch button, a system reset button, a hard disk
read/write indicator, a power-on indicator.
In addition, there was a hard disk read/write indicator (red) and a power-on indicator (blue) on board on
the rear IO panel.
JPOWER (screen printing: JPOWER)
Signal
Pin
Signal
HDD_LED+
1
2
PWR_LED+
HDD_LED-
3
4
PWR_LED-
RSTBTN-
5
6
PWR_ON+
RSTBTN+
7
8
PWR_ON-
NC
9
10
(N/A)
2.14 CPU FAN Socket (screen printing: CPU_FAN)
The board provides a CPU cooling fan socket for better cooling and heat dissipation.
CPU_FAN:
Pin
Signal
1
+5V
2
GND

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2.15 Hardware Auto Start (Screen Printing: JAT)
JAT (Screen Printing: JAT)
Setting
JAT
Close
Hardware Auto Start
Please note that this jumper’s function is similar to the BIOS’s “Restore AC Power Loss” function. When
the latter is set to power on, the device will also start automatically after power is connected.
2.16 CMOS Clearance/Retention (screen printing: JCMOS)
CMOS is powered by onboard button batteries. Clearing CMOS will permanently remove the previous
system settings and restore the board system to original settings (factory settings).
Step 1: Turn off the PC and disconnect the power adapter.
Step 2: Press JCMOS for 10 seconds and disconnect.
Step 3: Restart the device, press the <DEL> button to enter the BIOS, load the optimal default value,
save, and exit the settings.
CLR_CMOS (Screen Printing: CLR_CMOS)
Setting
JCMOS
Close
Clear CMOS
Please do not clear COMS when the PC is connected to power in case board damages.
3
CPUFAN_TAC
4
CPUFAN_CTL