OLIMEX© 2015
IMX233-OLinuXino-MAXI user's manual
6.1.1 UART debug
The first one is a debug UART interface – U_DEBUG. You can use our USB-SERIAL-CABLE
for debugging via the UART.
In order to avoid SD card malfunction, when using the USB-SERIAL-CABLE-F with
OLinuXino-MAXI it is advisable to first insert the iMX233-OLinuXino-SD card and then
power the board (if using battery also press the PWR button). Wait 4-5 seconds and then
connect the USB-SERIAL-CABLE-F.
Please also check “2.4 Powering the board” for detailed info.
Note on how to use the U_DEBUG with USB-SERIAL-CABLE-F which has
RED GREEN
BLUE wires GND=BLUE, RX(INPUT)=GREEN, TX(OUTPUT)=RED.
Y
ou have to connect
to OLinuXino-MAXI U_DEBUG connector in this sequence:
BLUE wire to pin.3 (GND)
GREEN wire to pin.2 (TX)
RED wire to pin.1 (RX)
U_DEBUG
Pin # Signal Name
Processor Pin #
1
PWM0/DUART_RXD
125
2
PWM1/DUART_TXD
126
3
GND
30, 35, 98, 105, 112, 118
4
DEBUG
84
You can also check the pin names at the bottom of the board under the U_DEBUG header.
6.1.2 SJTAG debug
The second interface is the Serial JTAG (SJTAG) one-wire interface. It works with various external
JTAG debugger dongles through a Freescale-defined FPGA/CPLD. SJTAG supports the Green
Hills Slingshot and ETM probe debugger dongles, as well as those made by ARM, Abatron, and
Lauterbach.
Note that the SJTAG interface comes without plastic header mounted.
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