OLIMEX© 2015
A13-SOM user's manual
6.4.3 GPIO-3 (General Purpose Input/Output) 10pin connector
GPIO-3 connector
Pin # Signal name Processor pin#
Pin #
Signal name
Processor pin#
1
SPI2_CS0
PE0/CSI_PCLK/SPI2_CS0/EIN14 (114)
2
USB0-VBUSDET
PG1/EINT1 (154)
3
SPI2_CLK
PE1/CSI_MCLK/SPI2_CLK/EIN15 (115)
4
USB0-IDDET
PG2/EINT2 (153)
5
SPI2_MOSI
PE2/CSI_VSYNC/SPI2_MOSI (116)
6
USB0-DRV
PG12/SPI1_MISO/UART3_RTS (15)
7
SPI2_MISO
PE3/CSI_HSYNC/SPI2_MISO (117)
8
TWI2-SCK
PB17/TWI2_SCK (161)
9
UBOOT
UBOOT (157)
10
TWI2-SDA
PB18/TWI2_SDA (160)
6.5 LCD_TR 40pin connector
The pins used for LCD display connection are led out to a separate 40pin connecter for ease. We
have tested the ability of the board to interact with such a display. These pins also allow the user to
attach additional hardware, check readings or perform hardware debug.
Important: it is a good idea to use A13-SOM-WIFI that provides a 0.1 step connector. Alternatively
the connector can be used standalone but you would need to either use wires or male-male
connector and two different 40PIN ribbon cables to connect an Olimex display and the LCD_CON.
Please note that the smallest display (4.3'', 480×272) is not suitable for the official Android images
we provide, however it can be used with Debian Linux.
The biggest display (15.6'', 1366×768 or 1920×1080) is not supported by the A13-SOM design. The
core processor lacks the required computing power for a smooth operation.
LCD_CON connector
Pin# Signal name
Processor pin
Pin#
Signal name
Processor pin
1
+5V
-POWER CIRCUIT-
2
GND
-POWER CIRCUIT-
3
3.3V
-POWER CIRCUIT-
4
GND
-POWER CIRCUIT-
5
LCD_D18
PD18/LCD_D18 (135)
6
NOT CONNECTED
NOT CONNECTED
7
LCD_D18
PD18/LCD_D18 (135)
8
LCD_D19
PD19/LCD_D19 (134)
9
LCD_D20
PD18/LCD_D20 (133)
10
LCD_D21
PD21/LCD_D21 (132)
11
LCD_D22
PD18/LCD_D21 (132)
12
LCD_D23
PD23/LCD_D23 (130)
13
LCD_D10
PD10/LCD_D10 (141)
14
NOT CONNECTED
NOT CONNECTED
15
LCD_D10
PD10/LCD_D10 (141)
16
LCD_D11
PD11/LCD_D11 (140)
17
LCD_D12
PD12/LCD_D12 (139)
18
LCD_D13
PD13/LCD_D13 (138)
19
LCD_D14
PD14/LCD_D14 (137)
20
LCD_D15
PD15/LCD_D15 (136)
21
LCD_D2
PD2/LCD_D2 (148)
22
NOT CONNECTED
NOT CONNECTED
23
LCD_D2
PD2/LCD_D2 (148)
24
LCD_D3
PD3/LCD_D3 (147)
25
LCD_D4
PD4/LCD_D4 (146)
26
LCD_D5
PD5/LCD_D5 (145)
27
LCD_D6
PD6/LCD_D6 (144)
28
LCD_D7
PD7/LCD_D7 (43)
29
LCD_HSYNC
PD26/LCD_HSYNC (127)
30
LCD_VSYNC
PD27/LCD_VSYNC (126)
31
LCD_CLK
PD24/LCD_CLK (129)
32
LCD_DE
PD25/LCD_DE (128)
33
PIN7
PB3/IR_TX/SPI2_MISO/EINT17 (150)
34
PIN8
PB4/IR_RX/EINT18 (104)
35
PIN9
PB10/SPI2_CS1/EINT24 (10)
36
PIN6/PWM0
PB2/PWM/SPI2_MOSI/EINT16 (103)
37
TPX1
TPX1 (89)
38
TPX2
TPX2 (87)
39
TPY1
TPY1 (90)
40
TPY2
TYP2 (88)
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