NINA-B2 series - System Integration Manual
UBX-18011096 - R03
Page 3 of 30
Contents
Document Information ................................................................................................................................ 2
Contents .......................................................................................................................................................... 3
1
System description ............................................................................................................................... 5
1.1
Overview ........................................................................................................................................................ 5
1.1.1
Block diagram ...................................................................................................................................... 5
1.2
Product description .................................................................................................................................... 6
1.2.1
Radio in NINA-B2 series ..................................................................................................................... 6
1.3
CPU................................................................................................................................................................. 6
1.4
Operating modes ......................................................................................................................................... 6
1.4.1
Power modes ....................................................................................................................................... 6
1.5
Supply interfaces ........................................................................................................................................ 6
1.5.1
Module supply design (VCC) ............................................................................................................. 6
1.5.2
Digital I/O interfaces reference voltage (VCC_IO) ........................................................................ 7
1.5.3
VCC application circuits .................................................................................................................... 7
1.6
System function interfaces ...................................................................................................................... 7
1.6.1
Boot strapping pins ............................................................................................................................ 7
1.7
Serial Interfaces .......................................................................................................................................... 8
1.7.1
Universal asynchronous serial interface (UART) ......................................................................... 8
1.8
Antenna interfaces ..................................................................................................................................... 9
1.8.1
Antenna pin – NINA-B221 ................................................................................................................. 9
1.8.2
Integrated antenna – NINA-B222 .................................................................................................... 9
1.9
Reserved pins (RSVD) ................................................................................................................................ 9
1.10
GND pins ....................................................................................................................................................... 9
2
Software ................................................................................................................................................. 10
2.1
Flashing the NINA module .......................................................................................................................10
2.2
Updating the NINA-B2 u-blox connectivity software ........................................................................10
3
Design-in ................................................................................................................................................. 12
3.1
Overview ......................................................................................................................................................12
3.2
Supply interfaces ......................................................................................................................................12
3.2.1
Module supply (VCC) design ...........................................................................................................12
3.2.2
Digital I/O interfaces reference voltage (VCC_IO) ......................................................................12
3.3
Antenna interface .....................................................................................................................................13
3.3.1
RF transmission line design (NINA-B221 only) ..........................................................................13
3.3.2
Antenna design (NINA-B221) .........................................................................................................15
3.3.3
On-board antenna design (NINA-B222) .......................................................................................18
3.4
Data communication interfaces ............................................................................................................18
3.4.1
Asynchronous serial interface (UART) design ............................................................................18
3.5
General High Speed layout guidelines ..................................................................................................18
3.5.1
General considerations for schematic design and PCB floor-planning .................................19
3.5.2
Module placement ............................................................................................................................19
3.5.3
Layout and manufacturing .............................................................................................................19
3.6
Module footprint and paste mask .........................................................................................................19
