Alinx AN970 User manual

7-inch LCD Touch
Screen Module AN970
User Manual

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7-inch LCD Touch Screen Module AN970 User Manual
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Table of Contents
Part 1: 7” LCD Touch Screen Module Description............................................3
Part 1.1: AN970 LCD Touch Screen Module Detail Parameter..............3
Part 1.2: AN970 LCD Drive Timing............................................................. 4
Part 2: Hardware Connection...............................................................................6
Part 3: 7”LCD Screen Display Experiment........................................................ 9
Part 4: 50,000 pixel Camera LCD Display Experiment................................. 10

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Part 1: 7” LCD Touch Screen Module Description
The ALINX 7-inch LCD touch screen module (AN970) is a combination of a
7-inch TFT LCD screen and a capacitive touch screen. The LCD screen adopts
the 7-inch TFT LCD screen of Tianma. The model of the LCD screen is
TM070RDH13.
The AN970 LCD touch screen module consists of a TFT LCD screen, a
capacitive touch screen and a driver board. Figure 1-1 is the AN970 module
product photo as below:
Figure 1-1: AN970 Module Product Photo
Part 1.1: AN970 LCD Touch Screen Module Detail Parameter
7”LCD display LCD Touch Screen module detail parameter listed:
7”LCD display module size dimension: detailed as Figure 1-2
LCD screen size: 7.0 inches (diagonal)

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Display pixels: 800 (horizontal) x 480 (vertical)
Color depth: 16.7M colors (RGB 24-bit color)
Power and power consumption: single power supply 5V, power
consumption is 1.8 watts
Figure 1-3: AN871 Module Size Dimension
Part 1.2: AN970 LCD Drive Timing
Horizontal Input Timing
The LCD screen display mode starts from the top left corner of the screen
and is displayed point by point from left to right. Each time a line is displayed, it
returns to the start position of the next line on the left side of the screen. During
this time, the rows need to be blanked, and at the end of each line, the line sync
signal is used for synchronization. There are two ways to drive the LCD, one is
HV mode and the other is DE mode, both of which can drive the LCD screen,
and the data is sampled on the rising edge of DCLK.

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Figure 1-4: Horizontal Input Timing
Table 1-1 detailed the parameters of horizontal input timing
Table 1-1: The Parameters of Horizontal Input Timing

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Part 2: Hardware Connection
40-pin 0.1”spacing female header P4, connect directly to the expansion port
of the development board with a 40-pin female header, so that the connection is
simple and reliable.
Figure 2-1: The 7-inch LCD Touch Screen Module Connection Interfaces
40-pin female header connection
The signal definition of the female header 40-pin is compatible with the
40-pin expansion port on the ALINX FPGA development board, and can be
directly inserted into the development board. The following is a schematic
diagram of the hardware connection between the AX301B development board
and the 7-inch LCD touch screen module:

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Figure 2-2: Hardware connection
The signal definition of the 40-pin 0.1”spacing female headers on the 7-inch
LCD touch screen module is shown in the figure 2-3 and Table 2-1
Figure 2-3: The connector on the PCB

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Pin Name
Pin of
P4
Description
Pin Name
Pin of
P4
Description
GND
Pin1
Reference Ground
VCC5V
Pin2
5V Power Input
INIT
Pin3
Screen interrupt
BACK_LE
D_PWM
Pin4
Back light PWM
Control
SCL
Pin5
Screen I2C Clock
SDA
Pin6
Touch I2C Data
LCD_HSYN
C
Pin7
Horizontal
Synchronize
LCD_VSY
NC
Pin8
Vertical Synchronize
LCD_DCLK
Pin9
Pixel Clock
LCD_DE
Pin10
Date Enable
LCD_B6
Pin11
Bit 6 of blue data
LCD_B7
Pin12
Bit 7 of blue data
LCD_B4
Pin13
Bit 4 of blue data
LCD_B5
Pin14
Bit 5 of blue data
LCD_B2
Pin15
Bit 2 of blue data
LCD_B3
Pin16
Bit 3 of blue data
LCD_B0
Pin17
Bit 0 of blue data
LCD_B1
Pin18
Bit 1 of blue data
LCD_G6
Pin19
Bit6 of green data
LCD_G7
Pin20
Bit 7 of green data
LCD_G4
Pin21
Bit4 of green data
LCD_G5
Pin22
Bit 5 of green data
LCD_G2
Pin23
Bit2 of green data
LCD_G3
Pin24
Bit 3 of green data
LCD_G0
Pin25
Bit0 of green data
LCD_G1
Pin26
Bit 1 of green data
LCD_R6
Pin27
Bit 6 of red data
LCD_R7
Pin28
Bit 7 of red data
LCD_R4
Pin29
Bit 4 of red data
LCD_R5
Pin30
Bit 5 of red data
LCD_R2
Pin31
Bit 2 of red data
LCD_R3
Pin32
Bit 3 of red data
LCD_R0
Pin33
Bit 0 of red data
LCD_R1
Pin34
Bit 1 of red data
LCD_SDA
Pin35
LCD screen I2C
data
LCD_SCL
Pin36
LCD screen I2C
clock
GND
Pin37
Reference Ground
GND
Pin38
Reference Ground
D3V3
Pin39
3.3V( Reserved）
D3V3
Pin40
3.3V(Reserved）
Table 2-1: Signal Definition of the 40-pin female header

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Part 3: 7”LCD Screen Display Experiment
The experiment takes the AX301B FPGA development board as an
example. After the 7”LCD touch screen module and the AX301B FPGA
development board are connected, use the Quartus 17.1 software to open the
example project of the lcd_test we provide.
Figure 3-1: Example Project of the lcd_test we provide
Download the lcd_test.sof file to the development board and you will see
the LCD screen displaying the color bar image.

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Figure 3-2: LCD Display Color Bar Image
Part 4: 50,000 pixel Camera LCD Display Experiment
This experiment demonstrates the video image of OV5640 on the 7-inch
LCD screen with ALINX 7-inch LCD touch screen module. In the experiment, the
AX301B development board is taken as an example, and the 8000*480 pixel
video image of the OV5640 is output to the LCD for display.
Insert the OV5640 camera module into the Camera interface of the FPGA
development board, and then connect the FPGA development board and the
7-inch LCD display module. Figure 4-1 detailed the connection of the AX301B
development board.

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Figure 4-1: AX301B Camera LCD Display Experiment
Open the test project sdram_ov5640_vga.qpf in the directory of
sdram_ov7670_rgb_lcd_800480 provided by Quartus software.
Figure 4-2: A test project sdram_ov5640_vga.qpf
Download the sdram_ov5640_vga.sof file to the FPGA development
board, we can see the video image of the ov5640 camera on the LCD screen.
Detail as Figure 4-3.

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Figure 4-3: OV5640 video image LCD display effect