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New Member
Hello, i am having issues with the pinout for the sb6121 and a flashcat 2.1, i already have tried all the options i was able to find on the internet for the pinout but im not able to detect them.
So far what im doing its in the attached files
I havae tried with external power for the vcc (the purple one) and also with the modem powered and the vcc next to the ground (black one)
Need help im getting crazy, i can flash sb5101 but not this ones.

I also hace tried with 2 options for the isp pin the one on the other chip and in 253.

I have tried with 3 of them
Thanks beforehand



Staff member
Your wiring look incorrect , look in the manual and you will see there is a diagram that shows where each connection goes too.