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OLIMEX© 2015
3.3V I2C Master 0
3.3V SPI Flash 1 Master 0
3.3V SPI Flash 2 Master 0
Start up waits for JTAG
debugger connection
3.3V SD/MMC 1 (Default!!!) 1
6.9 Jumper description
Please note that all the jumpers on the board are SMD type. If you feel insecure in your
soldering/cutting technique it is better not to try to adjust the jumpers. Additionally for the NANO
board the jumpers are pretty tiny to keep the board factor as small as possible. If you are not good at
soldering you might damage the board permanently.
/CS and DH/DS
6.9.1 CH
Those two jumpers must be moved together – there are two available options – configuring
software I2C interface (CS, DS) or hardware I2C interface (CH, DH).
The default positions of these jumpers of latest revisions of the board are CS/DS (hardware I2C).
Note that if you wish to use our UEXT modules the jumpers should be set to hardware I2C
position.
6.9.2 CSS/CSH
This jumper controls whether the I2C CS (chip select) is software or hardware.
CS_SW:Open/CS_HW:Close
The default position is CS_HW closed (hardware CS).
6.9.3 Boot mode selecting jumpers
The boot mode is discussed in chapter 6.8 of this manual.
6.10 Additional hardware components
The components below are mounted on OLinuXino but are not discussed above. They are listed
here for completeness:
BOOT MODE D03
USB 0
3.3V NAND 0
0
3.3V SD/MMC 2 1
iMX233-OLinuXino-NANO user's manual
d02
0
0
0
0
1
1
0
0
Page 28 of 36
d01
d00
0
0
0
1
1
0
1
1
0
0
1
0
0
1
1
0
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