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 1. 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