There are at least 3 UART debug interfaces onboard. ![]() The boot loader (U-Boot) presumably boots a Linux kernel off the SD-card, which loads the pedal’s control software. My guess (to be confirmed) is that IC1 (64k serial EEPROM) contains a boot loader that’s executed by the MX283. The ISP header is exposed but unpopulated. There’s an ATMEL ATtiny48 microcontroller, too. It turns out to be powered by a small NXP i.MX283 ARM9 system-on-chip. A bricked X4 and a small workshop full of electronic toys. ![]() Like most of the TC support encounters I’ve read about, it wasn’t helpful. I tried repeatedly to get more technical information about debugging the issue, but didn’t get anywhere. ![]() I filed a ticket with a detailed bug report of the problem, but they just referred me to a repair shop in Texas and closed the support ticket. ![]() Turns out they’re neither technical nor supportive. If I put a blank SD-card in the X4 instead of the one it came with, it never boots past all of the lights coming on – it doesn’t get as far as turning on the LOOP1 red LED. When power is applied, all the lights come on in red and green (people call it orange?) A few seconds later all the LEDs go off and the single solid red LED at LOOP1 comes on and stays on. I’m just an annoyed customer with a bricked Ditto X4 and some technical know-how. I am in no way affiliated with TC Electronics or anyone/anything to do with them.
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