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Use STM32 ST-LINK Utility, cannot find the target, STM32L4R9ZIY6PTR-WLCSP144. Four ST-LINK pins connected: SWCLK, SWDIO, Vtarget, GND. Note:NRST pin of STM32L4R9ZIY6PTR is not connected.

HYuan.1
Associate II

‎2023-04-05 4:09 PM

 
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Tesla DeLorean
Guru

‎2023-04-05 5:01 PM

Does the ST-LINK Utility support L4+ devices? Use STM32 Cube Programmer.

If the ST-LINK can't find the part and connect, its probably not viable.

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HYuan.1
Associate II

‎2023-04-05 10:20 PM

Only when connect NRST pin to ST-LINK, the STM32L4R9 can be connected. But from the data sheet the NRST pin is not needed.

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