6.1 PCB layout
Figure 4. Top layout
Two stickers are present on the top of the MB1389 board: one RF certification sticker and one UID64 sticker.
1. The “RF certification” sticker is mandatory for any boards containing an RF module as this Nucleo MB1389,
which contains a LoRa/SigFox RF transceiver. This sticker is placed on top of the RF shielded box. This
sticker must have a maximum size of 16 mm x 16 mm. This sticker displays at least the product CPN
(NUCLEO-WL55JCx), the board reference (MB1389x-0x), the FCC ID number (YCP-MB1389000), the ISED
ID (8976A-MB1389000) of the board, and the CE logo.
2. The UID64 sticker. A 64-bit unique device identification (UID64) is stored in the Flash memory and can be
accessed by the CPUs, at the 0x1FFF7580 base address. The UID64 sticker (with a size of 10 mm x 5 mm)
displays the UID information (16 digits as 64-bit codification in little-endian byte order) which is unique for
each LoRa MCU, so unique for each MB1389 board.
UM2592
PCB layout
UM2592 - Rev 1
page 9/49
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