OLIMEX© 2015
iMX233-OLinuXino-NANO user's manual
Ensure the board is soft powered down before removing the SD card – unplugging the SD card
during board operation OR removing the power supply during board operation might corrupt the
SD card, rendering it useless.
When removing the card, please make sure that you release it from the connector by pushing and
NOT by pulling the card directly (this can damage both the connector and the microSD card).
It is a good idea to be sure there are currently no read/write operations performed when ejecting the
SD card, or you might corrupt your Linux OS. If you corrupt the SD card you can download a new
image from the iMX233 wiki article at our web site.
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 three jumpers PIN29/SOFT_CL – PIN22/LCD_EN/I2C_SCL; PIN28/SOFT_SDA3 –
PIN21/LCD_HSYNC/I2C_SDA, and CS_SW:Open/CS_HW:Close which by default are set to a
hardware I2C! They can be used to set the UEXT to a hardware SPI. Additionally the chip select
might be left open.
Note that if you wish to use our UEXT modules the jumpers should be set to hardware I2C
position.
UEXT connector
Pin #
Signal name
Processor pin #
1
+3.3V_REG
-
2
GND
-
3
AUART1_TXD
127
4
AUART1_RXD
128
5
I2C_SCL
34* OR 11(default)
6
I2C_SDA
31* OR 15(default)
7
PIN9/LCD_D08/SSP2_MISO
22
Page 21 of 36
