STM32 MCUs Boards and hardware tools

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Will there be different typesetting for ST 32-bit MCU body screen printing of the same model? Will there be different screen printing layouts due to different origin, packaging and environmental materials.

The typesetting of the second picture is inconsistent with that of the datesheet, does it exist? In addition, what is the meaning of E3 and E4, and what is the meaning of "X"

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一李.1 by Associate II
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STM32L081KZT6 Programmging

Hello! I've developed a pcb using the STM32L081KZT6I power it with a 3v3 volt supply and I'm trying to program it via JTAG-SWDSo I connected the SWCLK and SWDIO pins to pin 24 and 23 as shown in the datasheet, then I connected ground and 3v3 to their...

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BBori.1 by Associate II
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