Validation of TM4C JTAG Header Selection and Design

Justin Reina89

I am building a TM4C123GH6PM board for personal home use, building my own drone :). I cannot find reference design examples of JTAG layout for any TM4C devices, and have the following questions:

Questions

Are there any reference designs provided for the Tiva TM4C JTAG connection?
Which JTAG device should I use?
1. Just need programming, debugging and code-stepping for personal use
2. I have picked use of the TI ARM JTAG Device, using the 10-pin connection, which makes use of the following TM4C pins (as listed in sec 4.3.1 of the datasheet):

Is the following layout correct, including VCC, GND and pull-up usage? (only JTAG wiring shown here!)

Is anything missing here, in the JTAG device selection and layout?

over 9 years ago

0 Amit Ashara over 9 years ago

TI__Guru**** 244440 points

Hello Justin,

Maybe not a reference design but an application note

www.ti.com/.../spma075.pdf

TI reference designs that have been released this year e.g. PoE, have the same also defined.

0 Justin Reina89 over 9 years ago in reply to Amit Ashara

Expert 2195 points

Thank you immensely Amit, this provides the direct and complete response for me. I am a wee bit embarassed here, I wasn't aware of the reference designs for TI... sheesh! :)

See attached ZIP for a selection of (6) TI reference designs, with each debug header pulled out ('jtag.png'). Here is the PoE reference you refer to -

And then here is my updated design for my Debug JTAG header -

Thank you Amit!! :)

soln source files.zip

0 Justin Reina89 over 9 years ago in reply to Justin Reina89

Expert 2195 points

and perhaps consider having your team provide this as a JPG or HTML from the TM4C pages :)

0 Amit Ashara over 9 years ago in reply to Justin Reina89

TI__Guru**** 244440 points

Hello Justin,

That's OK. We all miss information from time to time. Your design looks fine. Make sure that the values specified in the reference design is what you use as well.

0 Amit Ashara over 9 years ago in reply to Justin Reina89

TI__Guru**** 244440 points

Hello Justin,

There are no plans to do a datasheet rev as of now. But if one is planned then we may add one for sure.

Arm-based microcontrollers

Arm-based microcontrollers forum

Validation of TM4C JTAG Header Selection and Design