TMS320F28335 does not start without JTAG emulator

Alexander Kazakevich21

Other Parts Discussed in Thread: TMS320F28335

Hi,

Our customer works with TMS320F28335 (their own board). When they have disconnected JTAG emulator, flashed program does not start. But, program starts after short pulse have given on EMU0 pin.

What is wrong (the program must start without pulse)?

Thanks

Alexander

EFO Ltd (TI distri)

over 9 years ago

0 Gautam Iyer over 9 years ago

Guru 192875 points

Hi Alexander,

Alexander Kazakevich21 said:
What is wrong (the program must start without pulse)?

What is the current status of EMU0 & 1 pins on the board? Where are they connected or are they left open?

Regards,

Gautam

0 Alexander Kazakevich21 over 9 years ago in reply to Gautam Iyer

Prodigy 90 points

Hi Gautam,

Thanks for the reply. Both EMU0 and EMU1 were pulled to Vdd by 2.2k resistors.

0 Gautam Iyer over 9 years ago in reply to Alexander Kazakevich21

Guru 192875 points

Alexander Kazakevich21 said:
Thanks for the reply. Both EMU0 and EMU1 were pulled to Vdd by 2.2k resistors.

Seems fine. I would like you to check the JTAG section of the below document:

http://www.ti.com/lit/an/spraas1b/spraas1b.pdf

Let me know if this helps you resolve your issue.

Regards,

Gautam

0 Alexander Kazakevich21 over 9 years ago in reply to Gautam Iyer

Prodigy 90 points

OK, thank you Gautam. Next week customer will try othe 5 boards, probably there will be not a problem with them.

Alexander

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28335 does not start without JTAG emulator