Product Introduction

The L16 is powered by a high performance, low power consumption quad-core processor from Rexchip Microelectronics, RK3566, equipped with Android 11, with an up to 1.8GHz main frequency. The embedded 3D GPU makes the RK3566 fully compatible with OpenGL ES 1.1/2.0/3.2, OpenCL 2.0 and Vulkan 1.1.Integrated LVDS, MIPI, 100Gb Ethernet, wifi, Bluetooth, 5W*2 amplifier, TF card expansion, IR remote control, serial port/IO expansion, HDMI output, MIC, backlight power supply, etc., which greatly simplifies the whole machine design.

It supports decoding of most of the current popular video and image formats, and can drive various TFT LCD displays, greatly simplifying the whole system design, with stronger stability, and is widely used in AI servers, face payment devices, security, healthcare, transportation, finance, industrial control, intelligent education, smart retail and other AI intelligent fields.

Functions:

• High integration: integrated USB/LVDS/EDP/HDMI/Ethernet/WIFI/Bluetooth in one, simplify the whole machine design, can be inserted into the TF card.
• High stability: in the hardware and software, increase the division to develop the technology to ensure the stability of the product, can make the final product to 7 * 24 hours unattended.
• Rich expansion interface: 4 USB interfaces (2 pins, 1 standard USB3.0, 1 standard USB2.0), 6 expandable serial port, GPIO/ADC interface, can meet the market requirements of a variety of peripherals.
• High-definition: maximum support for 3840 × 2160 decoding and a variety of LVDS/EDP interface LCD display.
• Full-featured: support for horizontal and vertical screen playback, video split screen, scrolling subtitles, timer switch, USB data import and other functions.
• Convenient management: humanized playlist background management software, easy to manage and control the advertisement playback. Playback log, easy to understand the playback situation.

Product Appearance

Note: The above pictures are selected from a batch (a combination of functions) of our base plate to shoot, due to the continuous updating and maintenance of products, the actual shipment of the base plate may not be consistent with the picture, to the customer to get the prototype shall prevail.

Product Parameters

Main hardware parameters
Mode		Main recommended :L16(no 4G),L16B-CH(China 4G Global),L16B-G(Global,recommend) L16B-NA,L16B-EU,L16B-LA(Bulk consider the cost can choose, sample recommended global models)
CPU		Quad-core 64-bit Cortex-A55, up to 1.8 Ghz
GPU		ARM G52 2EE support OpenGL ES 1.1/2.0/3.2,OpenCL 2.0,Vulkan 1.1
Memory		2G/ 4G/8G(Optional)
Built-in Memory		EMMC 16G / 32G /64G/128G(Optional)
Display		Support EDP/HDMI2.0/MIPI/LVDS(Only supports single-screen output display by default)
System		Android 11
Play Mode		Support multiple playback modes such as loop, timing, insertion and so on
Multi-media		Support 4K 60fps H.265/H.264/VP9 1080P 100fps H.265/H.264 video decoding
USB Interface		1 USB 3.0/USB2.0 each, 2 built-in USB sockets
Serial Interface		6 TTL serial sockets (can be changed to RS232 or 485)
LVDS Output		1 single/dual interfaces to directly drive 50/60Hz multi-resolution LCDs
EDP Output		Supports up to 2560*1600 @ 60fps output
HDMI Output		1pc,support 1080P@120Hz,4kx2k@30Hz output
CTP Interface		1 way I2C touch screen interface
Audio and Video Outputs		Support left and right channel outputs, built-in dual 8R/5W amplifiers
RTC Real Time Clock		Support
Scheduled on/off Switching		Support
System Upgrade		Support SD card/computer update
Network Support		Support 10/100M/1000M adaptive Ethernet Support WiFi/Bluetooth 4.0, 4G external expansion
Size		126.5mm*70mm/±0.5mm,Plate thickness 1.6mm±10%
Working Environment		Temperature: 0°C to 80°C, recommended 5°C to 35°C, humidity: 10% to 90%, no condensation
Software		LedOK Express,LEDOK Lite
Supported Bands
Mode	3G/4G bands (optional)		Certification
L16B-CH	-China(China/India) FDD-LTE:B1/3/5/8 TDD-LTE:B38/39/40/41 TDSCDMA:B34/39 WCDMA:B1/8 CDMA 1X/EVDO:BC0 GSM:B3/5/8		Mandatory certification:SRRC/ NAL/ CCC Other:WHQL
L16B-NA	-North America(North America) FDD-LTE:B2/4/5/7/12/13/17 WCDMA: B2/4/5		Carrier certification:AT&T/ T-Mobile/Rogers/ TelusVerizon/AT&T (FirstNet)/T-Mobile/U.S. Cellular/Rogers/ Telus Mandatory/conformance certification::FCC/ IC/ PTCRB Other:WHQL
L16B-EU	-Eurasia(EMEA/Korea/Thailand/India and other Asian countries) FDD-LTE:B1/3/5/7/8/20 TDD-LTE:B38/40/41 WCDMA:B1/5/8 GSM:B3/5/8		Carrier certification:Vodafone/Deutsche Telekom/SKT/ Telefónica Mandatory/conformance certification:GCF/ CE/ KC/ NCC/RCM/ FAC/ NBTC/ICASA Other:WHQL
L16B-LA	-Latin AmericaLatin America /Australia / New Zealand) FDD-LTE:B1/3/5/7/8/28 TDD-LTE:B40 WCDMA:B1/2/5/8 GSM:B2/3/5/8		Mandatory/conformance certification:GCF/ FCC/ Anatel/ NCC/RCM Other:WHQL
L16B-G	-Global(Global) FDD-LTE:B1/2/3/4/5/7/8/12/13/ 18/19/20/25/26/28 TDD-LTE:B38/39/40/41 WCDMA:B1/2/4/5/8/6/19 GSM:Quad-band		Carrier certification:Deutsche Telekom/ Verizon/ AT&T/ Sprint/U.S. Cellular/ Telus Mandatory/conformance certification:GCF/ CE/ FCC/ PTCRB/ IC/ Anatel/IFETEL/ SRRC/ NAL/ CCC/ KC/ NCC/ JATE/ TELEC/ RCM/ NBTC/ IMDA/ICASA Othe:WHQL
L16B-J	-Japan(Japan) FDD-LTE:B1/3/8/18/19/26 TDD-LTE:B41 WCDMA:B1/6/8/19		Carrier certification:NTT DOCOMO/SoftBank/ KDDI Mandatory/conformance certification:JATE/ TELEC Other:WHQL

Interface Parameters/Definitions

(Power Horizontal Socket 2.54MM )

Serial number	Definition	Attribute	Description
1	12V	DC12V-IN	12V power input
2	12V	DC12V-IN	12V power input
3	GND	Power Ground	Power Ground
4	GND	Power Ground	Power Ground

• Connect to this socket when using the built-in power input;
• The power supply voltage is 12V input, the use range is acceptable between 9V-14V, don't

use the power adapter which exceeds this range.

• Please be sure to connect the motherboard input power to the power input connector or socket, and evaluate whether the whole board current meets the requirements according to the total peripherals to select the appropriate power adapter;
• 2.54 Socket single PIN rated current 2.5A, 2PIN seat maximum 5A, please do not exceed this current.

LCD-BL(LVDS Screen Backlight Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	BL-12V_IN	Power Output	12V backlight power output, 12V power supply directly backlight board, the size of the current depends on the current of the adapter
2	BL-12V_IN	Power Output
3	ON / OFF	Control Output	Backlight panel switch signal, active high
4	ADJ	Control Output	PWM control of LVDS screen brightness
5	GND	Power Ground	Power Ground
6	GND	Power Ground	Power Ground

• Pay attention to the order of the feet, can not be connected to the reverse;
• For models that do not need to use the ADJ function, the ADJ can be directly suspended

or connected to the ON/OFF, so as to avoid the problem of screen darkness, the ADJ is

connected to the high or low, need to check the screen specifications to determine.

• EDP backlight control interface definition as above.

LCDVCC( LVDS Screen Backlight Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	BL-3.3V_IN	Power Input	3.3V power input, jump cap connection
2	BL-VCC-OUT	Backlight Output	LVDS_LOGIC power output
3	BL-5.0V_IN	Power Input	5.0V power input, jump cap connection
4	BL-VCC-OUT	Backlight Output	LVDS_LOGIC power output
5	BL-12V_IN	Power Input	12V power input, jump cap connection
6	BL-VCC-OUT	Backlight Output	LVDS_LOGIC power output

• After connecting the LCD screen, be sure to pay attention to how much logic voltage is

needed for the display, and jump the jump cap to the corresponding voltage selection

above the PIN foot, otherwise it is easy to burn out the display circuit. (On the display

voltage, please consult the corresponding screen specification) It is very important;

USBID(Power Input Jump-Select Vertical Pin 2.00MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	OTG-SEL	Select Foot	USB function status selection

• After this jump cap is connected, the external USB port (by the TF card slot) is USB-HOST function, not connected is USB-DRV function.
• If you are using J12 interface for DEBUG debugging, please remove this jump cap. If you connect the mouse and other devices, this jump cap must be connected, the default connection.
• No posting by default

WIFI/BT Antenna Holder

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	RF	Signal Input	WIFI,BT Signal Input

• Note that the WIFI antenna holder is IPEX-2 generation holder, please match the external

antenna bar with the 2 generation female holder.

• Regarding the connection between the antenna holder and the PCB fixed pad is small. When disassembling, please pay attention to the light buckle to take out, to avoid directly pulling out and lead to the antenna holder and the PCB separation can not be repaired.

MIC(Microphone Standing Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	MIC+	Mic input +	Microphone Positive
2	MIC-	Mic input +	Microphone Positive

1. The MIC+ of the microphone connector and the headphone connector are the same way, and can only be used in one of the two ways

Headphone Holder (Quad 3.5MM Interface)

Serial number	Definition	Attribute	Description
1	PL	L-OUT	left channel output
2	PR	R-OUT	right channel output
3	SNS	GND	Ground
4	MIC+		microphone input

• The MIC+ of the headphone jack and the microphone 2PIN connector are the same way, only one can be used in either way.

RTC(Battery Vertical Pin 1.25MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	RT+	RTC Clock Power Supply	Power supply output, hold system time

• External 2032 coin cell battery with extension cable for RTC.

SPK(Speakers Horizontal Sockets 2.00MM)

Serial number	Definition	Attribute	Description
1	PL+	L output positive	Speaker amplifier output positive
2	PL-	L output negative	Speaker amplifier output negative
3	PR-	R output negative	Speaker amplifier output negative
4	PR+	R output positive	Speaker amplifier output positive

• This is a double speaker connection, when using a single speaker is PIN1 and PIN2 group, PIN3 and PIN4 group, can not be mistaken;
• The use of the speaker, need to connect the speaker before switching on, do not allow the

use of power unplugging. Default use of 8-ohm speakers;

• Speaker interface power output characteristics (limit conditions: TA = 25 ℃, DC = 12.0V)
• Amplifier chip default 2 * 8 ohm / 5W, pay attention to the use of the speaker matching

interval. It is recommended that the speaker rated power can be achieved in more than 3W. Chip can support up to 2 * 8 ohm / 10W (need to change the hardware parameters)

KEY(External Vertical Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	POE	Input	System Boot Button
2	RST	Input	Reset Signal Interface
3	KEY	Input	KEY expansion interface (up to 7 keys)
4	GND	Ground	Ground

1. The configuration of the keys can be adjusted, subject to the actual communication

requirements.

CTP(Touch Screen Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	RST	Reset	CTP reset, compatible with GPIO/PWM
3	INT	Interrupt	CTP interrupt, compatible with GPIO/PWM
4	SCL	I2C- SCL	I2C clock
5	SDA	I2C-SDA	I2C data,
6	VCC-3.3V	Power output	VCC-3.3V

• Default is CTP interface, when want to change to GPIO port, you need to reconfigure

the software.

IR&LED(Remote Control Indicator Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	RED	LED Red Output	Positive pole of RED lamp, system operation status indicator
2	GND	Ground	Power Ground
3	BLUE	LED Blue Output	Positive pole of RED lamp, system operation status indicator
4	IVC	Power Input	Remote Power Output
5	GND	Ground	Power Ground
6	IR	Signal Input	IR Signal Input

• Indicator lamps use common cathode LED lamps by default. If a common anode lamp is

used, the common pin of the LED lamp can be connected to the 3rd PIN as the power

input when making an external extension cable. Note that the state of the light will change

after this connection, and software configuration update is required;

• Remote control supports hard switching function. Remote power on button needs

software configuration, or remote code value learning to match before use;

• About the remote control that needs to be reconfigured to make sure the buttons are

available. If use a remote control that is not certified by our company, need to

communicate with the business to confirm

GPIO(Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	GPIO1	Input/Out put	Default GPIO port, compatible with RST for CTP
3	GPIO2	Input/Out put	Default GPIO port, compatible with RST for CTP
4	GPIO3	Input/Out put	Default GPIO port, compatible with RST,SCL for CTP
5	GPIO4	Input/Out put	Default GPIO port, compatible with SDA for CTP
6	VCC-3.3V	Input/Out put	VCC-3.3V

• The port is GPIO by default. When used as CTP port, it needs to be configured separately by software;
• I/O port voltage is 3.3V, pay attention to the level matching.

TTYS6(UART/RS232 Vertical Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX6/A	Data Transmission	UART_TX, compatible with GPIO
3	UART_RX6/B	Data Reception	UART_RX, compatible with GPIO
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS6;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

TTYS7(UART/RS232 Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX7/A	Data Transmission	UART_TX, compatible with GPIO
3	UART_RX7/B	Data Reception	UART_RX, compatible with GPIO
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS7;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

TTYS8(UART/RS232 Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX8/A	Data Transmission	UART_TX, compatible with GPIO
3	UART_RX8/B	Data Reception	UART_RX, compatible with GPIO
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS8;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

TTYS9(UART/RS232 Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX9	Data Transmission	UART_TX, compatible with GPIO
3	UART_RX9	Data Reception	UART_RX, compatible with GPIO
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS9;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

TTYS0(UART/RS485 Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX0	Data Transmission	UART_TX, compatible with GPIO
3	UART_RX0	Data Reception	UART_RX, compatible with GPIO
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS0;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

TTYS5(UART/RS485 Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	VCC-3.3V	Power Output	VCC-3.3V
2	UART_TX5 / A	Power Output	Data output, connected to RX pin of external device
3	UART_RX5 / B	Power Input	Data input, connected to RX pin of external device
4	GND	Ground	Ground

1. Default is 1 TTL form of output, can add chip to change to RS232, port number is ttyS5;

2. 3 V 3 output voltage is 3.3V; output current is 500MA;

3. When to use as GPIO port, need software to configure separately.

4. The I/O port voltage is 3.3V, note the level matching.

CUSB2(Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Ground
2	DP	Data Positive	Data positive, connect to USB_DP pin of external device
3	DM	Data Negativity	Data negative, connect to USB_DM pin of external device
4	5V	Power Output	5V Power cable

1. This USB port is the main control directly out of the USB port;

CUSB3(Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	GND	Ground	Data positive, connect to USB_DP pin of external device
2	DP	Data Positive	Data negative, connect to USB_DM pin of external device
3	DM	Data Negativity	5V Power cable
4	5V	Power Output	Data positive, connect to USB_DP pin of external device

1. This USB port is the main control directly out of the USB port;

EDP-DATA(Double Row EDP Screen Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	EDP-VCC_IN	Power Input	LCD power supply, +3.3V / +5V/ +12V selectable via “J55	The red box marks the first pin
2
3	GND	Ground	Ground
4
5	EDP-TX0-	Output	Display Port Lane 0 negative output
6	EDP-TX0+	Output	Display Port Lane 0 positive output
7	EDP-TX1-	Output	Display Port Lane 1 negative output
8	EDP-TX1+	Output	Display Port Lane 1 positive output
9	EDP-TX2-	Output	Display Port Lane 2 negative output
10	EDP-TX2+	Output	Display Port Lane 2 positive output
11	EDP-TX3-	Output	Display Port Lane 3 negative output
12	EDP-TX3+	Output	Display Port Lane 3 positive output
13	GND	Ground	Ground
14	GND	Ground	Ground
15	EDP-AUX-	Output	Port AUX- chanenl negative singal
16	EDP-AUX+	Output	Port AUX+ chanenl positive singal
17	GND	Ground	Ground
18	GND	Ground	Ground
19	+3.3V	Output	Voltage Output
20	EDP-HPD	Output	Screen hot-plugging detection signal

1. There is a 1-pin start bit on the main board.

LVDS-DATA(Dual Row LVDS Screen Horizontal Socket 2.00MM)

Serial number	Definition	Attribute	Description
1	LCDVCC-IN	Power Output	LCD power supply, +3.3V / +5V/ +12V selectable via “J55”	The red box marks the first pin
2
3
4	GND	Ground	Ground
5
6
7	RXO0-	Output	Pixel0 Negative Data (Odd)
8	RXO0+	Output	Pixel0 Positive Data (Odd)
9	RXO1-	Output	Pixel1 Negative Data (Odd)
10	RXO1+	Output	Pixel1 Positive Data (Odd)
11	RXO2-	Output	Pixel2 Negative Data (Odd)
12	RXO2+	Output	Pixel2 Positive Data (Odd)
13	GND	Ground	Ground
14	GND	Ground	Ground
15	RXOC-	Output	Negative Sampling Clock (Odd)
16	RXOC+	Output	Positive Sampling Clock (Odd)
17	RXO3-	Output	Pixel3 Negative Data (Odd)
18	RXO3+	Output	Pixel3 Positive Data (Odd)
19	RXE0-	Output	Pixel0 Negative Data (Even)
20	RXE0+	Output	Pixel0 Positive Data (Even)
21	RXE1-	Output	Pixel1 Negative Data (Even)
22	RXE1+	Output	Pixel1 Positive Data (Even)
23	RXE2-	Output	Pixel2 Negative Data (Even)
24	RXE2+	Output	Pixel2 Positive Data (Even)
25	GND	Ground	Ground
26	GND	Ground	Ground
27	RXEC-	Output	Negative Sampling Clock (Even)
28	RXEC+	Output	Positive Sampling Clock (Even)
29	RXE3-	Output	Pixel3 Negative Data (Even)
30	RXE3+	Output	Pixel3 Positive Data (Even)

1. There is a 1-pin start bit on the main board.