Maxtang BYT-35 SBC User manual

BYT-35 SBC Disk Size Motherboard

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© 2022 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.
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Shenzhen Maxtang Computer Co., Ltd
1
BYT35 Motherboard
User Manual
(Version 2.1)
Version:
NO.
Description
Issue Date:
V2.0
Initial Version
2021/12/30
V2.1
1. Modify the working voltage of LVDS/EDP to: 5V/3.3V
2. Added the backlight standard and reverse adjustment function through
LVDS/EDP hardware jumper
2022/1/12

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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 Storage (screen printing: MSATA, SATA1, PWSATA) .......................................................................................... 7
2.5 USB Interface...................................................................................................................................................... 7
2.6 LAN ..................................................................................................................................................................... 7
2.7 Audio Interface ................................................................................................................................................... 7
2.8 COM.................................................................................................................................................................... 8
2.9 GPIO (Screen printing: GPIO).............................................................................................................................. 9
2.10 Board Power Supply (Screen Printing: PWR2).................................................................................................. 9
2.11 Switch Button/ Indicator Pin (Screen Printing: JFP).......................................................................................... 9
2.12 Hardware Auto Start (Screen Printing: JAT) ................................................................................................... 10
2.13 CMOS Clearance/Retention (Screen Printing: JCMOS)................................................................................... 10

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Chapter 1 Product Introduction
1.1 Brief Introduction
The BYT-35 V2.1 motherboard is a 3.5" SBC (Single Board Computer) based on the Intel Bay Trail platform,
features small form factor, low power consumption and high performance.
1.2 Parameters
Bay Trail Platform:
⚫J1900, quad-core, 1.8GHz - 2.42GHz, TDP 10W, supports EIST
⚫J1800, dual-core, 2.41GHz - 2.58GHz, TDP 10W, supports EIST
⚫N2940, quad-core, 1.83GHz - 2.25GHz, TDP 7.5W, supports EIST
Memory: 1x SO-DIMM DDR3L-1333 on-board, maximum capacity 8 GB
GPU: Integrated Graphics based on CPU, Display via 1x HDMI1.4, 1xVGA,1x LVDs (eDP optional)
Storage: 1 x mSATA (Compliant with SATA2.0, mini PCIE optional), 1 x SATA2.0 standard,
Audio: High-Definition Audio Codecs, supports Speaker-out, Mic-in, and power amplifier functions
USB: 1x USB3.2 Gen 1, 7x USB2.0 (4*header)
Ethernet: 2x Gigabyte Network Controllers on-board (Intel i211)
Serial I/O: 6x RS232 COM (COM5, COM6*RS485 optional)
Other I/O: 1x mini-PCIe, Micro SIM, support WIFI/BT/3G/4G module; 1 set of GPIO pins, 1 set of JFP switch pins
Dimension: 146mm x 102mm (3.5")
Power: 12V DC-in
Working Temperature: -20℃~60℃

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1.3 Connector Diagram
LAN1
E/L_BKL
E/L_VCC
SO-DIMM
LAN2
PWSATA
USB2.0+USB3.2
MSATA
Mini-PCIE
COM14
GPIO
COM5_6
2*USB2.0
CPU
2*USB2.0
Micro SIM Card
PWR2
Audio
HDMI
JAT
SATA
1
EDP/LVDS
2*USB2.0
JCOMS
JFP
JAUD

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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
The board provides 1 x SO-DIMM DDR3L-1333 slots, maximum capacity of 8 GB.
2.3 Display Interfaces
The board features Integrated graphics, supports 1xHDMI1.4, 1xVGA, 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, E/L_VCC, L_VCC/BKL)
When it is configured as LVDS function, the "EDP/LVDS" pin transmits LVDS signals, the "E/L_BKL" pin is
the backlight adjustment jumper, and the "L_VCC/BKL" pin is the display working voltage adjustment jumper.
LVDS Data Pin (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
LVDS Backlight Pin (E/L_BKL):
Pin
Signal
1
GND
2
GND
3
LCD_BKL_ADJ

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4
LCD_BKL_ON
5
12V
6
12V
LVDS Working Voltage Pin (L_VCC/BKL):
Interface
Setting
Function
1-3
Close
VCC(+3.3V)
3-5
Close
VCC(+5V)
2-4
Close
REV (Backlight control reverse)
4-6
Close
STD (Backlight control standard)
Note: Set the LVDS display power supply jumper can be flexibly adjusted between 5V/3.3V. According to
the voltage parameters of the LVDS screen, the customer can use a jumper cap to short-circuit the voltage
pins that meet the requirements. (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 “E/L_BKL” is for the
backlight adjustment jumper and the “L_VCC/BKL” is for the display working voltage adjustment jumper.
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 Backlight Pin (Screen Printing: E/L_BKL)
Pin
Signal
1
GND
2
GND
3
LCD_BKL_ADJ
4
LCD_BKL_ON
5
12V

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6
12V
EDP Working Voltage Pin (L_VCC/BKL)
Interface
Setting
Functions
1-3
Close
VCC(+3.3V)
3-5
Close
VCC(+5V)
2-4
Close
REV (Backlight control reverse)
4-6
Close
STD (Backlight control standard)
Note: Set the eDP display power supply jumper can be flexibly adjusted between 5V/3.3V. It is strictly
forbidden to short-circuit pins of different voltages at the same time.
2.4 Storage (Screen Printing: MSATA, SATA1, PWSATA)
1x mSATA interface SATA2.0 on board (mini PCIe optional) 1x Standard SATA2.0 interface. The “PWSATA”
is the disk power supply interface of SATA.
Disk Power Supply (Screen Printing: PWSATA)
Pin
Signal
1
5V
2
GND
3
GND
4
12V
2.5 USB Interface
The board supports 1x USB3.2 Gen1 and 7x USB2.0(4*header on board, 2.0mm spacing)
Internal USB2.0 Pin (Screen Printing: F_USB20, F_USB21)
Signal
Pin
Signal
VCC 5V
1
2
VCC 5V
USB DATA-
3
4
USB DATA-
USB DATA+
5
6
USB DATA+
GND
7
8
GND
NC
9
10
(NC)
2.6 LAN
The board is equipped with two Intel i211 Gigabit Network Controller, RJ45 interface, supports Magic
packet wake-up and PXE network boot.
LED Status Indicators:
LI_LED Status (Green)
Function
ACT_LED Status (Orange)
Function
Always on
Network
Connected
Blinking
Data transfer
2.7 Audio Interface
The board features Realtek HD audio codec ALC897 supports a 3.5mm Line-out/MIC two-in-one combo
jack (CTIA American standard), and a built-in dual-channel power amplifier output socket for connecting
passive speakers.

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Two-in-one headphone jack:
JAUD (Screen Printing: JAUD)
Pin
Signal
1
L+
2
L-
3
R-
4
R+
2.8 COM
The board provides six RS232 onboard serial port headers (2.0mm spacing), and the COM5 and COM6
are RS485 optional. Screen printing COM14 is electrified, the voltage is the same as the input voltage of the
board.
RS232 COM (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 board input voltage)
DCD#
11
12
RXD
TXD
13
14
DTR#
GND
15
16
DSR#
RTS#
17
18
CTS#
RI#
19
20
VCC (Same as the board input voltage)
DCD#
21
22
RXD
TXD
23
24
DTR#
GND
25
26
DSR#
RTS#
27
28
CTS#
RI#
29
30
VCC (Same as the board input voltage)
DCD#
31
32
RXD
TXD
33
34
DTR#
GND
35
36
DSR#
RTS#
37
38
CTS#
RI#
39
40
VCC (Same as the board input voltage)

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COM5_6 Default RS232 (Screen: COM5_6)
Signal
Pin
Signal
NC
1
2
NC
RX5
3
4
RX6
GND
5
6
GND
TX5
7
8
TX6
NC
9
10
(NC)
COM5_6 RS485 Optional (Screen Printing: COM5_6)
2.9 GPIO (Screen Printing: GPIO)
The board provides a set of 2x5Pin GPIO (2.0mm spacing), 8 lanes of programmable I/O in total.
GPIO (Screen Printing:GPIO)
Signal
Pin
Pin
Signal
SIO_GP70
1
2
3.3V
SIO_GP71
3
4
SIO_GP74
SIO_GP72
5
6
SIO_GP75
SIO_GP73
7
8
SIO_GP76
GND
9
10
SIO_GP77
2.10 Board Power Supply (Screen Printing: PWR2)
The board provides a 2x2 ATX power supply interface, supports a 12V DC-in power supply.
PWR2 (Screen Printing:PWR2)
Definition
Pin
Definition
GND
2
1
GND
VIN
3
4
VIN
2.11 Switch Button/ Indicator Pin (Screen Printing: JFP)
The board has 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.
JFP (Screen Printing:JFP)
Signal
Pin
Signal
HDD_LED+
1
2
PWR_LED+
Signal
Pin
Signal
COM5_DATA-
1
2
COM6_DATA-
COM5_DATA+
3
4
COM6_DATA+
GND
5
6
GND
NC
7
8
NC
NC
9
10
(NC)

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HDD_LED-
3
4
PWR_LED-
RSTBTN-
5
6
PWR_ON+
RSTBTN+
7
8
PWR_ON-
NC
9
10
(NC)
2.12 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
2.13 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.
JCMOS (Screen Printing:JCMOS)
Setting
JCMOS
Close
Clear CMOS
Please do not clear COMS when the PC is connected to power in case board damages.
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