I have a Freedom KE02 board I am using as a programmer for a stand-alone KE02 system. I am using J7 as the programming interface, after disconnecting the dataline from the on-board KE02.
I have to use the stand-alone system at 5V. In order to keep using the Freedom board while powered up at 5V, I will disconnect V3.3 from J7. Should I put a 1KOhm resistor in line with the SWD_DIO or CLK lines? I am using TXD and RXD with 1KOhm resistors in line with those signals.
Please help, I also use FreeMaster so having the stand-alone and the Freedom boards connected while operating is required. I just don't want to hurt anything.
Thank you!
Andy.
Hi Andy,
Regarding to your query, I'd highly recommend you to use the 3.3-5 logic convert chip. I think it's good way to work it out.
You can learn the more information about it by through the link as below.
http://www.nxp.com/documents/application_note/AN240.pdf
Have a great day,
Ping
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