Datasheet

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. You 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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