IWR6843ISK: UniFlash:Received unexpected data

Keyvan Meraat

Part Number: IWR6843ISK
Other Parts Discussed in Thread: UNIFLASH, , MMWAVEICBOOST

Tool/software:

I am trying to flash the IWR6843ISK using UniFlash with the COM Enhanced Port.
SOP settings: 1 on, 2 off, 3 on, 4 on, 5 off, 6 off.

[8/19/2025, 3:51:32 PM] [INFO] Cortex_R4_0: Initialization complete.

[8/19/2025, 3:51:32 PM] [INFO] Cortex_R4_0: Flashing process starting...

[8/19/2025, 3:51:32 PM] [INFO] Cortex_R4_0: Connecting to COM Port COM47...

[8/19/2025, 3:51:32 PM] [INFO] Cortex_R4_0: Reset connection to device

[8/19/2025, 3:51:32 PM] [INFO] Cortex_R4_0: Set break signal

[8/19/2025, 3:51:46 PM] [ERROR] Cortex_R4_0: XXXX Received unexpected data!!!XXXX

[8/19/2025, 3:51:46 PM] [ERROR] Cortex_R4_0: Not able to connect to serial port. Recheck COM port selected and/or permissions.

[8/19/2025, 3:51:46 PM] [INFO] Cortex_R4_0: Flashing instance clean-up initiated...

[8/19/2025, 3:51:46 PM] [INFO] Cortex_R4_0: Instance deinitialized!

How can I resolve this issue? I have already tried restarting using NRST.

Best
Keyvan

25 days ago

0 Santosh Krishnan 25 days ago

TI__Mastermind 19450 points

Hello.

Do you have anything else connected on that COM port? Like a serial terminal or a visualizer?

Sincerely,

Santosh

0 Keyvan Meraat 24 days ago in reply to Santosh Krishnan

Prodigy 60 points

Nothing else is connected. only uniflash. I get this error on both stand alone mode and using mmwaveICBoost carrier.

0 Santosh Krishnan 23 days ago in reply to Keyvan Meraat

TI__Mastermind 19450 points

Hello Keyvan.

Can you also try power cycling the device or using a different cable? I am not able to replicate this on my end and your settings look correct. What demo are you trying to flash?

Sincerely,

Santosh

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IWR6843ISK: UniFlash:Received unexpected data