ILI9341 TFT LCD controller pinout

The ILI9341 drives a 240 × 320 TFT panel. The MSP3223 module exposes its 4-wire SPI interface and adds independent capacitive touch and SD interfaces.

MSP3223 · 14-contact header

14 contacts Current package

ILI Technology ·

MSP3223 · 14-contact header pinout

MSP3223 · 14-contact header

Follow the numbered contact or silkscreen on the exact module. The display and solder sides mirror each other.

Selected pin details

13 · CTP_INT

Output · Outputs

Active-low touch interrupt.

LCDWiki MSP3223 product specification, Interface Definition and module schematic.

Electrical limits · Link to this pin

All 14 pins

Pin	Signal	Direction	Function
1	VCC Supply input	Supply input	5 V module supply for the onboard regulator.
2	GND Supply return	Supply return	Connect to host ground.
3	LCD_CS Input	Input	Active-low display select.
4	LCD_RST Input	Input	Active-low display reset.
5	LCD_RS Input	Input	Low for a command byte. High for parameters and pixel data.
6	SDI Input	Input	Host data shared by the display and the SD socket.
7	SCK Input	Input	Host clock shared by the display and the SD socket.
8	LED Input	Input	Backlight control. The board schematic allows this input to be open or high for illumination.
9	SDO Output	Output	Data return shared by the display and the SD socket.
10	CTP_SCL Input	Input	Capacitive touch I²C clock.
11	CTP_RST Input	Input	Active-low touch controller reset.
12	CTP_SDA Bidirectional	Bidirectional	Capacitive touch I²C data.
13	CTP_INT Output	Output	Active-low touch interrupt.
14	SD_CS Input	Input	Active-low select for the SD card socket.

Signal assignments

Display SPI

The host sends the clock and display data. The separate D/C line distinguishes command or register index from data.

Touch I²C

The touch controller has separate reset, interrupt and bus signals.

SD card SPI

Keep the unused device deselected when sharing the bus.

Electrical limits

Parameter	Limit	Conditions and source
Module supply5.0 V	5.0 V	The module feeds a local 3.3 V regulator. This voltage applies to the board header. LCDWiki MSP3223 product specification, Interface Definition and module schematic.
Panel pixels240 × 320	240 × 320	Portrait address coordinates before rotation. LCDWiki MSP3223 product specification, Interface Definition and module schematic.
Write framing8 bits per transfer	8 bits per transfer	The module uses a separate LCD_RS line. Use the panel initialization sequence for the fitted module. LCDWiki MSP3223 product specification, Interface Definition and module schematic.

Models and documents

The map covers the LCDWiki MSP3223 2.54 mm header. The manufacturer lists the same signals on its separate 0.5 mm FPC connector. Consult the Ilitek pad table for a bare chip-on-glass design.

MSP3223: 3.2-inch module with capacitive touch.

LCDWiki MSP3223 manufacturer documentation· LCDWiki MSP3223 product specification, Interface Definition and module schematic.
ILI9341 controller datasheet· ILI Technology ILI9341 v1.09, §§ 6–7 and command table. Manufacturer PDF mirrored by Electrónicos Caldas.