Integration Manual

NINA-B4 series - System integration manual
UBX-19052230 - R09 Contents Page 4 of 60
C1-Public
2.6 Antenna interface ..................................................................................................................................... 20
2.6.1 External antenna selection ............................................................................................................. 22
2.6.2 NINA-B4x6 design-in ........................................................................................................................ 26
2.7 NFC interface ............................................................................................................................................. 27
2.7.1 Battery protection ............................................................................................................................ 28
2.8 Debug interface ......................................................................................................................................... 28
2.9 General layout guidelines ........................................................................................................................ 29
2.9.1 General considerations for schematic design and PCB floor-planning ................................. 29
2.9.2 Layout and manufacturing ............................................................................................................. 29
2.9.3 Thermal guidelines ...........................................................................................................................30
2.9.4 ESD guidelines ...................................................................................................................................30
2.10 Product testing .......................................................................................................................................... 31
2.10.1 u-blox in-series production tests ................................................................................................... 31
2.10.2 OEM manufacturer production test ............................................................................................. 32
3 Open CPU software ............................................................................................................................ 34
3.1 Nordic SDK.................................................................................................................................................. 34
3.1.1 Getting started with the Nordic SDK ............................................................................................ 34
3.1.2 Bluetooth device (MAC) address and other production data .................................................. 36
3.1.3 Definition of Low Frequency Clock source................................................................................... 37
3.2 Flashing open CPU software .................................................................................................................. 37
3.2.1 Flashing over the SWD interface ................................................................................................... 37
3.2.2 Flashing over the UART interface ................................................................................................. 38
4 u-connectXpress software ............................................................................................................... 41
4.1 Updating NINA-B41 software .................................................................................................................. 41
4.1.1 Updating over UART......................................................................................................................... 41
4.2 Low frequency clock source .................................................................................................................... 48
5 Handling and soldering ..................................................................................................................... 49
5.1 ESD handling precautions ....................................................................................................................... 49
5.2 Packaging, shipping, storage, and moisture preconditioning ......................................................... 49
5.3 Soldering ..................................................................................................................................................... 49
5.3.1 Reflow soldering process ................................................................................................................50
5.3.2 Cleaning .............................................................................................................................................. 51
5.3.3 Other remarks ................................................................................................................................... 51
Appendix ........................................................................................................................................................52
A Glossary ..................................................................................................................................................52
B Antenna reference designs ............................................................................................................. 54
B.1 Reference design for external antennas (U.FL connector) .............................................................. 54
B.1.1 Floor plan ............................................................................................................................................ 55
B.1.2 RF trace specification ...................................................................................................................... 55
Related documents .................................................................................................................................... 57
Revision history .......................................................................................................................................... 58
Contact .......................................................................................................................................................... 59