RL024C2222-14C

Pin No.

Symbol

I/O

Description

1

4L/8B

I

Select the MCU interface mode:

When 8b_4w='0', 8080 MCU 8-bit interface is selected.

When 8b_4w ='1', 4-wire 8-bit data serial interface is selected.

2

/RESET

I

Reset pin. Initializes the LCM when low.

3~10

DB7~DB0

I

8-bit bi-directional data bus

11

/RD

I

8080 system (RD): Serves as a read signal and MCU read data at the rising edge.

Fix to IOVCC level when not in using.

12

/WR_RS

I

8080 system (WRX): Serves as a write signal and writes data at the rising edge.

4-line system (D/CX): Serves as command or parameter select.

13

/ RS_SCL

I

This pin is used to select "Data or Command" in the parallel interface:

When DCX='1', data is selected.

When DCX='0', command is selected.

This pin is used to be serial interface clock in 3-wire 9-bit / 4-wire 8-bit serial data interface.

14

/CS

I

Chip select pin. Active: low

15

SDA

I

Serial input/ouput signal in 4-wire 8-bit serial data interface.

The data is applied on rising edge of the SCL signal.

If not used, fix this pin at VCC or GND

16

IOVCC

P

Power Supply for I/O System.

17~18

VCI

P

Analog power supply

19~22

LED_K

P

Backlight cathode

23

LED_A

P

Backlight anode

24

GND

P

Power ground

25

CTP_SCL

I

I2C clock input for CTP.

26

CTP_SDA

I/O

I2C data input and output for CTP

27

CTP_RST

I

CTP external reset PIN, Low is active

28

CTP_INT

I

CTP Interrupt request to the host, or Wakeup request from the host.

29

TP_VCC

P

+3.3V power supply for touch.

30

GND

P

Power ground