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, RS-485 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 holder, 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 holder. 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 pin-header interface and LVDS LCD pin-header 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 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
RS-485 Serial Port	1 x 3-wire serial port (UART2), 5.08mm pitch connector
RS-232 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 2Pin 2.54mm pitch MIC pin-header
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 holder	Onboard RTC battery holder (CR2032)
Buzzer	1 x PWM buzzer
SPI	2 x SPI interface(SPI0, SPI1), 2.0mm pitch PH-6A 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,includes 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 should work in conjunction with I2C2
32, 44	NC	Not connected

LVDS LCD Interface(on the back of the carrier board, 0.5mm pitch 24-Pin FPC seat)

Pin#	Name	Description
1-3	VDD_5V	5V power output, used to power LCD module
6,9,12,15,18,24	GND	Ground
4	LVDS_D0-	LVDS D0 negative output
5	LVDS_D0+	LVDS D0 positive output
7	LVDS_D1-	LVDS D1 negative output
8	LVDS_D1+	LVDS D1 positive output
10	LVDS_D2-	LVDS D2 negative output
11	LVDS_D2+	LVDS D2 positive output
13	LVDS_CLK-	LVDS CLK negative output
14	LVDS_CLK+	LVDS CLK positive output
16	LVDS_D3-	LVDS D3 negative output
17	LVDS_D3+	LVDS D3 positive output
19, 20	NC	Not connected
21	I2C2_SCL	I2C2 clock, it transmits capacitive touch panel's signal
22	I2C2_SDA	I2C2 data, it transmits capacitive touch panel's data
23	GPIOC16	capacitive touch panel's interrupt. It should work in conjunction with I2C2

RGB LCD Interface(on the front side of the carrier board, 2.0mm pitch 22 x 2 Pin header)

Pin#	Name	Description
1, 2	VDD_5V	5V power output, used to power LCD module
11,20,29,37,38,39,40	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 signal, it transmits capacitive touch panel's signals
42	I2C2_SDA	I2C2 data, it transmits capacitive touch panel's data
43	GPIOC16	capacitive touch panel's interrupt, it should work in conjunction with I2C2
32, 44	NC	Not connected

LVDS Interface(on the front side of the carrier board, 2.0mm pitch 10 x 2 Pin header)

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

LVDS Power Interface(on the front side of the carrier board, 2.0mm pitch 6Pin PH-6A connector)

Pin#	Name
1，2	VDD_12V
3	GPIOB18
4	NC
5, 6	DGND

DVP Camera Interface

Pin#	Name
1, 2	SYS_3.3V
7,9,13,15,24	DGND
3	I2C0_SCL
4	I2C0_SDA
5	GPIOB14
6	GPIOB16
8,10	NC
11	VSYNC
12	HREF
14	PCLK
16-23	Data bit7-0

Power Port

DC power port, applicable for DC 5.5 * 2.1mm power plug, 9V ~ 15V voltage input. The LVDS' backlight takes power directly from the power port. When you need to control the LVDS' backlight it is recommended to use a 12V/3A power input