OLIMEX© 2015
IMX233-OLinuXino-MINI user's manual
6.3 UEXT module
OLinuXino board has UEXT connector and can interface Olimex's UEXT modules.
For more information on UEXT please visit:
https://www.olimex.com/Products/Modules/UEXT/
*Note the two jumpers PIN29/SOFT_CL – PIN22/LCD_EN/I2C_SCL, and PIN28/SOFT_SDA3 –
PIN21/LCD_HSYNC/I2C_SDA which by default are set to a software SPI. They can be used to set
the whole UEXT to a hardware SPI.
UEXT connector
Pin # Signal Name
Processor Pin #
1
+3.3VREG
-
2
GND
30, 35, 98, 105, 112, 118
3
AUART1_TXD
127
4
AUART1_RXD
128
5
I2C_SCL
34(default) OR 11*
6
I2C_SDA
31(default) OR 15*
7
PIN9/LCD_D08/SSP2_MISO
22
8
SSP2_MOSI
21
9
SSP2_SCK
33
10
PIN12/LCD_D11/UEXT_CS
25
The UEXT pinout is also printed at the bottom of the board under the connector.
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