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IWR6843: Handling of U10-Pin of IWR6843ARQGALP device

user1475503

Prodigy 40 points

Part Number: IWR6843

Please tell us about the handling of U10-Pin of IWR6843ARQGALP device.
I think it depends on the input circuit of the JTAG-Debugger (Pullup / Pulldown, resistance value, etc.).
We'd like to know a circuit that can simply switch to a mode using a jumper socket while implementing the JTAG interface.
So many devices were connected at the same point in the schematic of the evaluation kit, that I couldn't know correct circuit.

over 3 years ago

0 Ishita Kochar over 3 years ago

TI__Mastermind 31680 points

Hello User,

Thanks for reaching out on TI E2E Forums.

We're looking into this concern and will get back within 24 hrs.

Regards,

Ishita

0 CHETHAN KUMAR Y.B. over 3 years ago in reply to Ishita Kochar

TI__Mastermind 25835 points

Hello user1475503,

U10 Pin refers to TDO pin, TDO pin serves as multi purpose pin.

1) TDO pin acts as a boot detection pin (SOP0) during the power up and at the NRESET release.

SOP pins have jumper switch to connect to pull up or pull down as shown below.

2) Also TDO pin acts as JTAG debug utility, where you could connect it to external debuggers.

For example on board XDS110 JTAG emulators

or external emulators as shown in the below JTAG connector.

Thanks and regards,

CHETHAN KUMAR Y.B.

0 user1475503 over 3 years ago in reply to CHETHAN KUMAR Y.B.

Prodigy 40 points

Thank you for your support.

You would mean the input circuit of the JTAG-Debugger side does not mount any pullup / pulldown resistance ?

0 CHETHAN KUMAR Y.B. over 3 years ago in reply to user1475503

TI__Mastermind 25835 points

Hello,

There is pull up and pull down resistor as shown in above images for the SOP pin, I.e. TDO, please follow the reference schematic.

Thanks and regards,

CHETHAN KUMAR Y.B.