MKL17/27z experience a 3-5 Sec startup delay

[RGassmann]

Hi pgo,

recently I got the FRDM-KL27z-Board which I of corse wanted to use with the USBDM right away. While the code of a simple flashing Led was working quickly, I noticed that the uC has a start delay of 3-5Sec. My first thoughts where that this has to do with the bootloader. Unfortunately that wasn't the case. After a discussion with a supporter I got a bin file which should work. Unfortunately my board still exerienced the delay. After this setback I tried to download the same s19/srec file with the OpenSDA. And voila it started up right away. And even my simple flashing led - Programm starts right away if I download it via OpenSDA but will experience a delay of 3-5Sec if downloaded via USBDM. This fact leads me to the assumption, that USBDM can not right to the entire flash of the uC (maybe some protection mechanism?). The same effect can be experienced on the MKL17 (which is nothing else than the MKL27 without USB). Is this a known Issue to you? I would be glad if you could look deeper into this issue. If you need sample codes I'd be happy to provide you with my samples. Looking forward to hearing from you. Best regards, Roman