User's Manual

Component description
UM2252
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DocID030806 Rev 2
4.3.3 Mid layer 1
The mid layer 1 is a pure GND plane. It provides a low ohmic DC path for the GND
connection.
Figure 7: PCB layout mid layer 1
4.3.4 Mid layer 2
Mid layer 2 is used for power distribution. It contains the power planes for the ST25R3911B
5 V supply and the 3.3 V to communicate with the STM32 Nucleo board.
Figure 8: PCB layout mid layer 2