3.4.2 Xplained Pro LCD Extension Connector

The LCD connector provides the ability to connect to display extensions that have a parallel interface. The connector implements signals for a MCU parallel bus interface and a LCD controller interface as well as signals for a touch controller. The connector pin-out definition is shown in Table 3-5. Note that usually only one display interface is implemented, either the LCD controller or the MCU bus interface.

A FPC/FFC connector with 50 pins and 0.5mm pitch is used for the LCD connector. The connector XF2M-5015-1A from Omron is used on several Xplained Pro designs and can be used as a reference.

Table 3-5. Xplained Pro LCD Connector
Pin number	Name	RGB interface description	MCU interface description
1	ID	Communication line to the ID chip on an extension board
2	GND	Ground
3	D0	Data line
4	D1	Data line
5	D2	Data line
6	D3	Data line
7	GND	Ground
8	D4	Data line
9	D5	Data line
10	D6	Data line
11	D7	Data line
12	GND	Ground
13	D8	Data line
14	D9	Data line
15	D10	Data line
16	D11	Data line
17	GND	Ground
18	D12	Data line
19	D13	Data line
20	D14	Data line
21	D15	Data line
22	GND	Ground
23	D16	Data line
24	D17	Data line
25	D18	Data line
26	D19	Data line
27	GND	Ground
28	D20	Data line
29	D21	Data line
30	D22	Data line
31	D23	Data line
32	GND	Ground
33	PCLK / CMD DATA SEL	Pixel clock	Display RAM select. One address line of the MCU for displays where it is possible to select either register or data interface.
34	VSYNC / CS	Vertical Synchronization	Chip select
35	HSYNC / WE	Horizontal Synchronization	Write enable signal
36	DATA ENABLE / RE	Data enable signal	Read enable signal
37	SPI SCK	Clock for serial peripheral interface
38	SPI MOSI	Master out slave in of serial peripheral interface
39	SPI MISO	Master in slave out of serial peripheral interface
40	SPI SS	Slave select for serial peripheral interface. Preferably a dedicated pin.
41	ENABLE	Display enable
42	I²C SDA	I²C data
43	I²C SCL	I²C clock
44	IRQ1	Interrupt 1
45	IRQ2	Interrupt 2
46	PWM	Backlight control
47	RESET	Extension reset
48	VCC	3.3V power supply for extension board
49	VCC	3.3V power supply for extension board
50	GND	Ground