2.2 inch 320x240 Touch LCD (A)

PIN NO.

SYMBOL

DESCRIPTION

FUNCTION

1

GND

Ground

Ground

2

3

3.3V

3.3V power supply

Connects to 3.3V

4

5

PWM

Backlight brightness adjustment

Control the backlight brightness via PWM

6

8

NC

NC

NC

10

NC

12

NC

14

NC

16

NC

18

NC

20

NC

22

NC

24

NC

26

NC

28

NC

30

NC

7

NC

9

NC

11

NC

13

NC

15

NC

17

NC

19

T_IRQ

Touch screen interrupt

Low level while the touch screen detects pressing

21

T_BUSY

Touch screen chip busy

23

T_CS

Touch screen chip select

Low active

25

T_DCLK

Touch screen SPI clock

Connects to SPI SCK

27

T_DIN

Touch screen data input

Connects to SPI MOSI

29

T_DOUT

Touch screen data output

Connects to SPI MISO

31

RESET

Reset the controller chip

Low active

32

33

SCI

Screen SPI data input (in Serial Mode)

Connects to SPI MOSI

35

SCL

Screen SPI clock (in Serial Mode)

Connects to SPI SCK

34

NC

NC

NC

36

NC

NC

NC

37

CS

LCD chip select (in Serial Mode)

Low active

38

39

RS

Instruction/Data register selection

RS = 1 : Data Register
RS = 0 : Instruction Register

40