330 ohm resistor needed to protect Olimex JTAG adapters during fuse blow?

Started by kenyee, March 25, 2013, 09:54:16 PM

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Is R2 in this diagram needed to protect Olimex's adapters when blowing the security fuse?

I noticed it's not Olimex's MSP430 boards, but wanted to confirm before I try this so I don't fry my JTAG-ISOv2 in SBW mode :-)


Hello kenyee,

This R2 is not needed as long as you use Olimex made JTAG capable of fuse programming (which is the case with your MSP430-JTAG-ISO-MK2). We have calculated this in the JTAGs we make.

Best regards,
Technical support and documentation manager at Olimex


Thanks, Lub.

This should probably be noted in the manual or product page.
The Tag-Connect folks said that adding that 330 ohm resistor twice won't work (which is why they make it optional on their SBW adapter board).

Nice to have it built-in though...not sure why TI didn't do that w/ their FET-UIF adapter