Hi Ryan, you was right. The sequence worked for me. The Problem was a timeout on I2C BUS while the data transfer, so my tool was resetting the uC. Unfortunately it was not possible to run the upload on 400kHz I2C Speed but 100kHz are fine. Now everything is done and working. When I use 400Khz, after x bytes of an x'th "RX Data" packet the uC holds the SCL line down for a longer time and it comes to a timeout.
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