Smart4418/6818SDK V2 1812

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1 Introduction

Overview

Front

Back

The Smart4418/6818SDK V2 1812 carrier board populates popular interface pins from the the Smart4418/6818 CPU board. These interface pins include HDMI, USB Host, MicroSD card slot, RS-233 port, RS485 port, RJ-45 Ethernet port, 3.5mm audio input and output, 4G module interface, MicroSIM card slot etc. It has some onboard hardware resources such as buzzer, buttons, RTC battery, microphone etc. All the popular interfaces and ports are on the same side. This layout makes it easy for customers to make a customized case for it. This carrier board can work with FriendlyElec's various LCDs such as HD702, HD702V, S430 LCD etc.
In order for users to test and develop prototypes this Smart4418/6818SDK carrier board also populates DVP camera interface, SPI, GPIO, I2C, UART and has onboard AP6212 WiFi module, PCB antenna, IPX interface, RTC battery interface. Users can easily connect various devices to this board for testing. This meets the requirements for fast prototyping in various industrial applications.
The Smart4418/6818SDK V2 1812 carrier board has both RGB LCD interface and LVDS LCD interface. It can work with FriendlyElec's HD702 LCD, HD702V LCD,S430 LCD. Its RGB LCD interface and LVDS LCD interface can be used to test other LCDs as well.

2 Hardware Spec

Features

Carrier Board Type	Smart4418/6818SDK V2 1812
Dimension	185 x 123(mm)
Applicable	Smart4418
Wi-Fi/Bluetooth	Onboard Wi-Fi Bluetooth module, PCB antenna and IPX Wi-Fi antenna interface
MiniPCIe Interface	4G module, only for text message, no voice service, onboard IPX to SMA antenna interface
SIM Card Slot	Pop-up MicroSIM card slot
DVP Camera Interface	24pin, 0.5mm 5mm pitch, FPC seat DVP Camera interface, ITU-R BT 601/656 8-bit
HDMI Output	1 x HDMI A Type, supports HDMI 1.4a(Smart4418) supports 1080p 30-frame video output
TTL Serial Port	1 x 3-wire serial port (UART0), 2.54mm pitch connector, it is by default used as a debug serial port
RS485 Serial Port	1 x 3-wire serial port (UART2), 5.08mm pitch connector
RS232 Serial Port	1 x 3-wire serial port (UART3), DB9 male connector
USB Host	3 x USB port, populated from USB 2.0 hub(compatible with USB 1.1) 2 x USB type A port, 1 x 2.0mm pitch PH-4A connector
USB Slave	1 x MicroUSB port, only for data transmission
Audio Input and Output	populated from Smart4418/Smart6818 CPU board supports audio recording and play 3.5mm audio jack and MIC input onboard Microphone
Ethernet	populated from Smart4418/Smart6818 CPU board, 1000/100/10M
Button	PWRKEY(power button) RST(reset button) K1/K2/K3 programmable buttons
LED	2 x GPIO programmable LED(on Smart4418/Smart6818 CPU board)
RTC Battery Interface	Onboard RTC battery interface (CR2032)
Buzzer	1 x PWM buzzer
SPI	2 x SPI interface(SPI0, SPI1), 2.0mm pitch PH-4A connector it can be used as GPIO pins
MicroSD Card Slot	pop-up MicroSD card slot
I2C	2 x I2C0 interface, 2.0mm pitch PH-4A connector
RGB LCD Interface	RGB LCD interface(45pin, 0.5mm pitch FPC seat) supports FriendlyElec's one-wire touch technology supports backlight control supports capacitive touch panel supports RGB888 supports full-color TFT LCD populated to 22 x 2Pin 2.0mm pitch pin-header
LVDS Interface	LVDS LCD interface(24pin, 0.5mm pitch FPC seat) i2c touch panel supports backlight control supports capacitive touch panel populated to 10 x 2 Pin 2.0mm pitch pin-header
LVDS power interface	2.0mm pitch PH-6A connector, it works as power input for LVDS
LCD Mounting Hole	applicable for FriendlyElec's HD702, HD702V and S430 LCD etc
Other Resources	1 x Onboard EEPROM, 1 x 3-Axis Digital Accelerometer 4 x 2Pin 2.54mm pitch pin-header, 1 x 3.3V, 1 x boot selection used to select boot from eMMC or MicroSD(HIGH means booting from eMMC and LOW means booting from MicroSD), 1 x RST, 1 x PWRKEY, 4 x GND
Power Supply	DC 9V~15V/2A, when use LVDS to control backlight it is recommended to use a 12V/3A power supply

3 Diagram, Layout and Dimension

3.1 Layout

RGB LCD Interface(on the back side of the carrier board, 0.5mm pitch 44Pin FPC seat)

Pin#	Name	Description
1, 2	VDD_5V	5V output, used to power LCD
11,20,29,37,38,39,40,45	DGND	Ground
3-10	Blue LSB to MSB	RGB blue
12-19	Green LSB to MSB	RGB green
21-28	Red LSB to MSB	RGB red
30	GPIOB25	GPIO pin, available for users
31	GPIOC15	used to detect LCD type used for backlight control and resistive touch panel. Users cannot change it.
33	VDEN	indicates whether RGB signals are valid
34	VSYNC	vertical synchronization
35	HSYNC	horizontal synchronization
36	LCDCLK	LCD clock, Pixel frequency
41	I2C2_SCL	I2C2's clock. It transmits capacitive touch panel's signals
42	I2C2_SDA	I2C2's data. It transmits capacitive touch panel's data
43	GPIOC16	capacitive touch panel's interrupt. It works together with I2C2
32, 44	NC	Not connected

LVDS LCD接口（板子背面，0.5mm间距24 Pin FPC贴片座）

Pin#	Name	Description
1-3	VDD_5V	5V输出, 可以给LCD模组供电
6,9,12,15,18,24	GND	参考地, 0电位
4	LVDS_D0-	LVDS差分数据0负极输出
5	LVDS_D0+	LVDS差分数据0正极输出
7	LVDS_D1-	LVDS差分数据1负极输出
8	LVDS_D1+	LVDS差分数据1正极输出
10	LVDS_D2-	LVDS差分数据2负极输出
11	LVDS_D2+	LVDS差分数据2正极输出
13	LVDS_CLK-	LVDS差分CLK负极输出
14	LVDS_CLK+	LVDS差分CLK正极输出
16	LVDS_D3-	LVDS差分数据3负极输出
17	LVDS_D3+	LVDS差分数据3正极输出
19，20	NC	没有任何连接
21	I2C2_SCL	I2C2的时钟信号, 用来传输电容屏触摸数据
22	I2C2_SDA	I2C2的数据信号, 用来传输电容屏触摸数据
23	GPIOC16	电容触摸中断信号, 配合I2C2使用

RGB LCD接口（板子正面，2.0mm间距22x2 Pin 排针）

Pin#	Name	Description
1, 2	VDD_5V	5V输出, 可以给LCD模组供电
11,20,29,37,38,39,40	DGND	参考地, 0电位
3-10	Blue LSB to MSB	RGB的蓝色信号
12-19	Green LSB to MSB	RGB的绿色信号
21-28	Red LSB to MSB	RGB的红色信号
30	GPIOB25	普通GPIO, 用户可控制
31	GPIOC15	一线协议信号, 以实现LCD型号识别, 背光控制和电阻触摸的功能. 系统已占用, 用户不可重新设置.
33	VDEN	指示RGB信号有效的信号
34	VSYNC	场信号
35	HSYNC	行信号
36	LCDCLK	LCD频率, Pixel frequency
41	I2C2_SCL	I2C2的时钟信号, 用来传输电容屏触摸数据
42	I2C2_SDA	I2C2的数据信号, 用来传输电容屏触摸数据
43	GPIOC16	电容触摸中断信号, 配合I2C2使用
32，44	NC	没有任何连接

LVDS接口（板子正面，2.0mm间距10x2 Pin排针）

Pin#	Name	Pin#	Name
1	SYS_3.3V	2	SYS_3.3V
3	GPIOC16	4	GPIOB18
5	DGND	6	DGND
7	LVDS_D0-	8	LVDS_D0+
9	LVDS_D1-	10	LVDS_D1+
11	LVDS_D2-	12	LVDS_D2+
13	DGND	14	DGND
15	LVDS_CLK-	16	LVDS_CLK+
17	LVDS_D3-	18	LVDS_D3+
19	I2C2_SCL	20	I2C2_SDA