4.2.2 LCD Extension Connector

Extension connector EXT4 is a special connector for LCD displays. The physical connector is a TE Connectivity 5-1734839-0 FPC connector.

Info:

Plugging a cable into the LCD connector creates routing stubs for the on-board SDRAM which creates ringing. The ringing will reduce the maximum SDRAM communication frequency. See EBI Signal Integrity for more information.

Table 4-4. Xplained Pro LCD Connector EXT4
Pin on EXT4	SAM V71 pin	Function	Shared Functionality
1 [ID]	-	Communication line to ID chip on extension board	-
2 [GND]	-	GND
3 [D0]	PC00	D0	SDRAM
4 [D1]	PC01	D1	SDRAM
5 [D2]	PC02	D2	SDRAM
6 [D3]	PC03	D3	SDRAM
7 [GND]	-	GND
8 [D4]	PC04	D4	SDRAM
9 [D5]	PC05	D5	SDRAM
10 [D6]	PC06	D6	SDRAM
11 [D7]	PC07	D7	SDRAM
12 [GND]	-	GND
13 [D8]	PE00	D8	SDRAM and Shield
14 [D9]	PE01	D9	SDRAM
15 [D10]	PE02	D10	SDRAM
16 [D11]	PE03	D11	SDRAM and Shield
17 [GND]	-	GND
18 [D12]	PE04	D12	SDRAM and Shield
19 [D13]	PE05	D13	SDRAM and Shield
20 [D14]	PA15	D14	SDRAM
21 [D15]	PA16	D15	SDRAM
22 [GND]	-	GND
23 [D16]	-	-
24 [D17]	-	-
25 [D18]	-	-
26 [D19]	-	-
27 [GND]	-	GND
28 [D20]	-	-
29 [D21]	-	-
30 [D22]	-	-
31 [D23]	-	-
32 [GND]	-	GND
33 [PCLK / CMD_DAT A_SEL]	PC30	GPIO	EXT1
34 [VSYNC / CS]	PD19	NCS3	Shield
35 [HSYNC / WE]	PC08	NWE
36 [DAT A ENABLE / RE]	PC11	NRD
37 [SPI SCK]	-
38 [SPI MOSI]	-
39 [SPI MISO]	-
40 [SPI SS]	-
41 [DISP ENABLE]	-	100K resistor to VCC_TARGET_P3V3
42 [TWI SDA]	PA03	TWD0	EXT1, EXT2, EDBG I2C, Camera, Audio, MediaLB, and Shield
43 [TWI SCL]	PA04	TWCK0	EXT1, EXT2, EDBG I2C, Camera, Audio, MediaLB, and Shield
44 [IRQ1]	PD28	WKUP5	EXT1, Camera, and Shield
45 [IRQ2]	PA02	WKUP2	EXT2, EDBG GPIO3, and Shield
46 [PWM]	PC09	TIOB7	LED1 and Shield
47 [RESET]	PC13	GPIO	EXT2 and Shield
48 [VCC]	-	VCC_TARGET_P3V3
49 [VCC]	-	VCC_TARGET_P3V3
50 [GND]	-	GND