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UM2153 データシート(PDF) 17 Page - STMicroelectronics

部品番号 UM2153
部品情報  Discovery kit for IoT node, multi-channel communicationwith STM32L4
PDF  57 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM2153 データシート(HTML) 17 Page - STMicroelectronics

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UM2153
Hardware layout and configuration
56
Figure 11. JP4: 5V_USB_CHARGER selection
Note:
If the board is powered by a USB charger, there is no USB enumeration, so the led LD7
remains OFF permanently and the board is not powered. In this specific case only, the
resistor R30 needs to be soldered, to allow the board to be powered anyway.
Caution:
Do not connect the PC to the ST-LINK (CN7) when R30 is soldered. The PC may be damaged
or the board may not be powered correctly.
The green LED LD5 is lit when the STM32L4 Discovery kit for IoT node is powered by the 5 V
correctly.
The power tree is showed in the Figure 12.



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