TTL LCD 40-Pin (Parallel RGB) - PinoutLab

// Specifications

Standard

Parallel RGB TTL interface

Pin Count

40

Data Width

18-bit or 24-bit RGB

Connector

FPC 0.5mm pitch or 2.54mm header

Speed

Up to 60fps at standard resolutions

Use Case

Small TFT displays, embedded UI, Raspberry Pi HATs

// Pin Reference Table

Pin	Name	Function	Type
1	GND	Ground	GND
2	VCC	Panel power 3.3V	PWR
3	R7	Red data bit 7 MSB	I/O
4	R6	Red data bit 6	I/O
5	R5	Red data bit 5	I/O
6	R4	Red data bit 4	I/O
7	R3	Red data bit 3	I/O
8	G7	Green data bit 7	I/O
9	G6	Green data bit 6	I/O
10	G5	Green data bit 5	I/O
11	G4	Green data bit 4	I/O
12	G3	Green data bit 3	I/O
13	B7	Blue data bit 7	I/O
14	B6	Blue data bit 6	I/O
15	B5	Blue data bit 5	I/O
16	B4	Blue data bit 4	I/O
17	B3	Blue data bit 3	I/O
18	GND	Ground	GND
19	VSYNC	Vertical sync	I/O
20	HSYNC	Horizontal sync	I/O
21	DOTCLK	Pixel clock	I/O
22	DEN	Data enable	I/O
23	DISP	Display enable	I/O
24	GND	Ground	GND
25	NC	No connect	I/O
26	BL+	Backlight anode	PWR
27	BL-	Backlight cathode	GND
28	TP_CLK	Touchpanel SPI clock	BUS
29	TP_CS	Touchpanel chip select	BUS
30	TP_MOSI	Touchpanel data in	BUS
31	TP_MISO	Touchpanel data out	BUS
32	TP_IRQ	Touchpanel interrupt	I/O
33	GND	Ground	GND
34	RST	Display reset active low	I/O
35	SCL	I2C clock	BUS
36	SDA	I2C data	BUS
37	GND	Ground	GND
38	GND	Ground	GND
39	GND	Ground	GND
40	GND	Ground	GND

Parallel RGB (TTL) LCD interface uses 18-bit or 24-bit direct digital connections for small TFT displays on embedded systems. Common on 3.5-7 inch displays for Raspberry Pi, Arduino shields, and STM32 projects.