JTAG on TWR-K65F180M requires placing resistors?

[paulb-sct]

From this earlier discussion question, it seems the TWR-K65F180M can be used with the Segger J-Link via connector J18 simply by removing jumper J32:

JTAG in TWR-K65F180M not functional on rev A0

But when I look at the schematic and the board, resistors R69 and R68 are not populated - these are the JTAG TDO and TDI lines respectively. I'm waiting for a cable but anticipating that I will probably need to place 0 ohm resistors at these locations to get it to work.

Can someone confirm this? Also, do R53 through R58 need to be populated as well?

Thank you.

[RichardR]

I on the other hand am unable to use the JLink debugger tool with the TWR-K65 whether J32 is removed or not.  Specifically, it is complaining about the TDO line remaining high.

[jeremyzhou]

Hi Paul,

As Alex mentioned above, I also can use the external J-link debugger tool to program the K65 after just remove the J32.

Hope it helps.
Have a great day,
Ping

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[annamol · Accepted solution]

Hi,

You can use Segger Jlink to flash K65F180M without soldering zero ohm resistors. I connected the 20 pin JTAG header onto J18, and removed jumper J32 which allows usage of external debuggers. I could flash codes using Segger Jlink  and it works.

[paulb-sct]

Thanks annamol alex and jeremyzhou. I guess the TDI and TDO lines aren't used with the Segger.