Ublox EVK-NINA-B50 User manual

UBX-23007761 - R02
C1-Public www.u-blox.com

Evaluation kit for NINA-B50 modules
User guide
Abstract
This document describes how to set up the EVK-NINA-B50 evaluation kit to evaluate NINA-B50
series standalone Bluetooth®5.3 Low Energy modules. It also describes the different options for
debugging and testing the development capabilities included in the evaluation board.

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Document information
Title
EVK-NINA-B50
Subtitle
Evaluation kit for NINA-B50 modules
Document type
User guide
Document number
UBX-23007761
Revision and date
R02
30-Nov-2023
Disclosure restriction
C1-Public
This document applies to the following products:
Product name
EVK-NINA-B501
EVK-NINA-B506
u -blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this
document. Copying, reproduction, or modification of this document or any part thereof is only permitted with the express
written permission of u-blox. Disclosure to third parties is permitted for clearly public documents only.
The information contained herein is provided “as is”. No warranty of any kind, either express or implied, is made in relation to
the accuracy, reliability, fitness for a particular purpose or content of this document. This document may be revised by u-blox
at any time. For most recent documents, please visit www.u-blox.com.
Copyright © u-blox AG.

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Contents
Document information................................................................................................................................2
Contents ..........................................................................................................................................................3
1Product description ..............................................................................................................................5
1.1 Overview........................................................................................................................................................5
1.2 Kit includes ...................................................................................................................................................6
1.3 Key features .................................................................................................................................................6
1.4 EVK-NINA-B50 block diagram..................................................................................................................7
1.5 Connectors ................................................................................................................................................... 8
2Setting up the evaluation board.......................................................................................................9
2.1 Evaluation board setup.............................................................................................................................. 9
2.2 Software Development ..............................................................................................................................9
NXP SDK ............................................................................................................................................... 9
Software debug options ....................................................................................................................9
2.3 Measuring current consumption ...........................................................................................................10
Using an ammeter ............................................................................................................................10
Using a voltmeter..............................................................................................................................10
Using an external power supply or power analyzer....................................................................10
3Board configuration ........................................................................................................................... 12
3.1 Powering options.......................................................................................................................................12
Selecting the power configuration jumpers ................................................................................12
Default power configuration, 3.3 V ...............................................................................................15
Battery powered, 3 1.71 V.............................................................................................................16
Battery powered with protection diode, 2.71.71 V ..................................................................17
External supply, 1.71- 3.60 V .........................................................................................................18
Raspberry Pi HAT..............................................................................................................................19
3.2 Disconnecting NINA signals from board peripherals ........................................................................19
4Interfaces and peripherals............................................................................................................... 21
4.1 Buttons and LEDs .....................................................................................................................................21
4.2 Arduino interface ......................................................................................................................................22
Arduino shield compatibility...........................................................................................................24
4.3 Raspberry Pi interface..............................................................................................................................24
Powering considerations.................................................................................................................27
UART ...................................................................................................................................................27
4.4 Additional Interfaces................................................................................................................................27
Extra memory external Flash ......................................................................................................29
Extra USB to UART interface .........................................................................................................29
CPU trace interface ..........................................................................................................................29
Appendix ....................................................................................................................................................... 30
ASchematics ........................................................................................................................................... 30
A.1 NINA-B4 to NINA-B50 pin correlation...................................................................................................34

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BGlossary ................................................................................................................................................. 36
Related documents ................................................................................................................................... 37
Revision history.......................................................................................................................................... 37
Contact.......................................................................................................................................................... 37

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1Product description
1.1 Overview
The EVK-NINA-B50 evaluation kit is a versatile development and evaluation platform that allows quick
prototyping of a variety of low-powered Internet of Things (IoT) applications, using Bluetooth 5.3 and
IEEE 802.15.4.
EVK-NINA-B50 boards are available in the following two variants that accommodate alternative
antenna solutions:
•EVK-NINA-B501, with open CPU NINA-B501 module, U.FL antenna connector for connecting to
external antennas and no external 32 kHz crystal.
•EVK-NINA-B506, with open CPU NINA-B506 module that includes an internal PCB trace antenna
and an external 32 kHz crystal.
Figure 1: EVK-NINA-B501 evaluation board
Figure 2: EVK-NINA-B506 evaluation board

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EVK-NINA-B50 evaluation boards provide access to the 29 GPIO pins and interfaces that are
supported on NINA-B50 modules. The interfaces are available through a variety of connectors,
including the ArduinoUNO R3 [1] and Raspberry Pi [2] header connectors. The boards also provide
simple USB drag-n-drop programming and a SEGGER J-Link debug interface.
NXP, the manufacturer of the K32W1480 SoC, provide a free Software Development Kit (SDK) that
includes a broad selection of drivers, libraries, and example applications that can be used for rapid
prototyping.
1.2 Kit includes
The EVK-NINA-B50 evaluation kit includes the following:
•NINA-B50 evaluation board with NINA-B501 or NINA-B506 module
•2.4 GHz external antenna with U.FL connector (only in EVK-NINA-B501)
•RP-SMA to U.FL antenna cable (only in EVK-NINA-B501)
•USB cable
1.3 Key features
EVK-NINA-B50boards provide:
•Evaluation board for NINA-B501 or NINA-B506 modules
•On-board programming and debug (SEGGER J-Link-OB)
•Support for developing your own software on the Open CPU NINA-B50 module
•USB-Serial interface for connection to host systems
•COM port isolation to remove USB-Serial to allow header use
•Additional flash memory support
•Multiple power supply options
o512 V power plug
o5 V USB supply
o512 V Arduino VIN input
oCR2032 coin cell
•Jumper headers and level shifters allow for flexible powering options
•Buttons and status LEDs for user interaction
•Arduino UNO R3 and Raspberry Pi compatible pin socket interface
1
•Current measurement access points from pin headers and jumpers
NINA-B50 open CPU modules, based on the NXP K32W1480, provide:
•IEEE 802.15.4 supporting Thread®, Matter, and Zigbee
•Bluetooth LE subsystem supporting Bluetooth 5.3 in 2.4 GHz band
•Bluetooth LE central, peripheral, and GATT client / server roles
•AT command set for Bluetooth protocol stack
•Peripherals
2
: ADC, GPIO, I2C, I3C, PWM, Camera IF, RTC, SDIO, SPI, UART, LCD
1
Not fully compatible due to less or different configurations on the module.
2
Not all peripherals available simultaneously

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1.4 EVK-NINA-B50 block diagram
Figure 3 shows the major interfaces and internal connections of the EVK-NINA-B50.
Figure 3: EVK-NINA-B50 block diagram
*Only supported on EVK-NINA-B506

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1.5 Connectors
Table 1 describes the available connectors of the EVK-NINA-B50 shown in Figure 4.
Connector
Function
Description
J5
Power supply
2.1 mm power jack, the center pin is the positive terminal. 512 V input.
J17
Power supply
Pin header that can be used to connect external power supplies. 512 V input.
BT1
Battery holder
CR2032 coin cell battery holder. CR2032 usually has a 3 V potential when fully
charged.
(J2)
2.4 GHz RF antenna
connector
U.FL coaxial connector that can be used to connect antennas or RF equipment. This
connector is only included in the EVK-NINA-B501.
J12
Cortex Debug connector
10-pin, 50 mil, pitch connector that can be used to connect external debuggers to
the NINA-B50 module. NINA-B50 modules support Serial Wire debug (SWD) and
Serial Wire Viewer, but not JTAG debug.
J8
Power supply, COM port
and debug USB
The USB connector is used to program, debug, and communicate with the NINA
module. It can also be used to power the entire board.
Table 1: EVK-NINA-B50 connector description
Figure 4: Available connectors and their pinout
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2Setting up the evaluation board
2.1 Evaluation board setup
To use Bluetooth Low Energy on EVK-NINA-B501 board, connect a 2.4 GHz antenna to the U.FL
antenna connector. The EVK-NINA-B506 board variant includes an antenna on the NINA module.
Plug in either an external power supply in the J5 connector or connect to a USB host with a USB cable
attached to the J8 connector. You can also power the evaluation board with a CR2032 coin cell
battery.
Make sure that the power configuration jumpers are connected according to your use case, as
described in Powering options. The Default power configuration, 3.3 V works for most use cases.
Be careful to check polarity before connecting an external power supply to the EVK-NINA-B50
evaluation board. Center conductor is positive (+) and the ring is negative (-).
The operating system installs the correct drivers automatically. The drivers need only to be installed
once when you connect the unit to a new computer.
If the drivers are not installed automatically, download the J-Link driver included in the J-Link
/ J-Trace Downloads
Two COM ports are automatically assigned to the unit by Windows:
•The COM port labelled USB Serial Portis used to communicate with the UART interface of the
NINA-B50 module.
•The COM port labelled JLink CDC UART Portcan be used as an extra USB to the UART
interface. See also Extra USB to UART interface.
To view the assigned COM ports on Windows 10, right click the Windows Start button and select the
Device Manager.
To view the assigned COM ports on Windows 7:
1. Open the Control Panel and select Hardware and Sound.
2. Open the Device Manager in Devices and Printers. This opens the Device Manager window where
you can view the assigned COM ports.
2.2 Software Development
NXP SDK
To use the EVK-NINA-B50 together with NXP SDK it is necessary to:
•Create your own board file
•Adapt the examples in the NXP SDK to use this board file
For more information about performing these tasks, see the Software section of the NINA-B50
system integration manual [4]. See also the u-blox short range open CPU GitHub repository [6].
Software debug options
Use either of the following options to debug software with EVK-NINA-B50:
•Onboard debug solution available through the USB connector
•External debugger connected to J12 connector

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An external debugger is useful when powering the evaluation board with a CR2032 coin cell battery,
or through the J5 external power supply connector. It is also useful when the MCU interface has been
disconnected from the NINA-B50 module using the jumpers on the J19 header.
SEGGER J-Link software [5] is necessary to debug with the onboard J-Link hardware on the EVK-
NINA-B50.
2.3 Measuring current consumption
Before starting the current consumption measurement, go through the Board configuration and
define your configuration preferences. Find out what NINA signals must subsequently be
isolated. The J22 jumper pins 1 and 3 must be removed to measure the current consumption.
Figure 5 shows some suggestions for connecting the various instruments when measuring module
current consumption.
Using an ammeter
An ammeter should be connected in series with the power source and whatever is being measured. In
this way, current can be measured when the NINA module is supplied from either the onboard 3.3 V
regulator or an external supply.
Using a voltmeter
The EVK board must be modified before module current can be measured with a voltmeter.
To modify the board, solder a low resistance, high tolerance, 0402 sized resistor to the footprint
labeled R6. This resistor replaces the jumper normally positioned between J22 pins 1 and 3. Any
current passing through the resistor produces a voltage across its terminals. Measure this voltage
with the voltmeter and calculate the current using Os law.
Using an external power supply or power analyzer
Connect the terminals of the instrument to the EVK pins, as shown in Figure 5. An ammeter can also
be added in series.
Since the external voltage of any connected instrument can never perfectly match the 3.3 V
generated by the EVK, some small current leakage is apparent whenever the signal from the NINA
module is connected to an EVK peripheral. The leakage is 
To reduce leakage current, use a second external power channel to supply the EVK peripherals. This
second channel must also be used to enable PC communication when using NINA supply voltages
other than 3.3 V.

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Figure 5: Different options when measuring NINA module current consumption

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3Board configuration
3.1 Powering options
Power can be supplied to the board in any of the following ways:
•Via any of the USB connectors, J8
•Using the power jack, J5
•Using the Arduino interface VIN or 5V pin, J1.8 or J1.5
•Using the Raspberry Pi interface 5V pins, J14.2 or J14.4
•Using the pin header J17
•Plugging in a battery to the battery holder BT1
These power supply sources are distributed to the rest of the board as shown in Figure 6.
Figure 6: Block diagram of the power net distribution
Selecting the power configuration jumpers
EVK-NINA-B50 offers flexible powering options for the NINA-B50 module and the board itself. To
configure this, jumpers are added or removed to pin headers, shorting two of the pins together and
connecting or disconnecting different power nets on the evaluation board. Figure 7 shows an overview
of the available power sources and targets. Figure 8 shows the location of the power configuration
jumper headers.
Check the jumper positions carefully. If any jumper is connected in a wrong way, it can
permanently damage the components that are ON or connected to the board. Note also that
some jumpers should not be mounted simultaneously.

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Figure 7: Overview of EVK power sources and targets showing connected schematic net names
Figure 8: Jumper headers J7 and J22 board location and pinout
DC/DC
Onboard 3.3 V
converter
Battery
Battery with
protection diode
MCU
PC communication
HAT
Raspberry Pi
expansion board
NINA module power
Board I/O power:
Level shifters, LEDs etc.
3V3
VBAT_DIODE
VBAT
VDD_MCU
3V3_PI
VDD_IO
VCC
VCC_IO
Sources Net names Targets
Any power net
-.-- V
External supply

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Connector
Pin no.
Schematic net
Description
J7
1
3V3
Regulated 3.3 V net. This net is supplied by the board and is always powered as
long as a power source is connected.
2
3V3_PI

connected, this net must be unconnected to prevent back currents. If a HAT is
connected, this net can be shorted to the EVK 3.3 V supply to power the HAT.
3
VBAT_DIODE
To protect the battery from current back surges, connect the battery to the
NINA module via a protection diode using this pin.
4
VDD_NINA
Connects to J22 pin 3, from where it can be connected to the module supply
pin or somewhere else.
5
VBAT
Battery and terminal
6
VDD_NINA
Connects to J22 pin 3, from where it can be connected to the module supply
pin or somewhere else.
7
3V3
Regulated 3.3 V net. This net is supplied by the board and is always powered as
long as a power source is connected.
8
VDD_NINA
Connects to J22 pin 3, from where it can be connected to the module supply
pin or somewhere else.
9
3V3
Regulated 3.3 V net. This net is supplied by the board and is always powered as
long as a power source is connected.
10
VDD_MCU
Supply net for the board functions not directly connected to the NINA module;
Interface MCU, USB hub, UART to USB converter, etc.
11
GND
Ground net
12
GND
Ground net
J22
1
VCC
NINA module voltage supply that connects to the module VCC pin. Shorted to
the VCC_IO net via 0 Ωresistor R4 by default.
2
VCC_IO
Connects to the NINA module VCC_IO pin. Shorted to the VCC net via 0 Ω
resistor R4 by default.
3
VDD_NINA
Connects to J7 pins 4, 6 and 8. Short J22 pins 1 and 3 allow the EVK to power
the NINA module.
4
VDD_IO
Supply net for level shifters, LEDs and peripherals connected directly to the
NINA module. Short J22 pins 2 and 4 use the NINA module I/O voltage as
supply.
5
GND
Ground net
6
GND
Ground net
Table 2: Pinout of jumper headers J7 and J22 used to configure the board power nets

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Default power configuration, 3.3 V
Figure 9 shows the default -of-the- power configuration for the evaluation board. In this
configuration, all board peripherals are powered up and the NINA module is directly supplied by the
board. Everything runs at 3.3 V.
Figure 9: Jumper positions for default power configuration
Connector
Add jumper to pins
Description
J7
7, 8
Selects the board regulated 3.3 V net as source for the VDD_NINA net.
9, 10
Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the NINA module. The NINA VCC and VCC_IO pins are connected to the
selected source for the VDD_NINA net.
2, 4
Powers up the peripherals directly connected to NINA such as LEDs and external
memory with the NINA supply voltage.
Table 3: Jumper positions for default power configuration
J7
BOARD
NINA
3V3
34
2 1
J22
VCC_IO
VCC
7
8
9
10
NINA module powerboard I/O power
J22: 2-4 J22: 1-3
PC communication
MCU
DC/DC
EVB powered
J7: 9-10J7: 7-8

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Battery powered, 3 1.71 V
When using a battery, Figure 10 shows the default configuration. The battery voltage is connected to
VDD_NINA, which in turn, is connected to the NINA-B50 VCC supply. If needed, a jumper can be added
to J22, pins 2 and 4, to supply LEDs and other peripherals with power as long as this does not exceed
the maximum current rating of the battery. If the NINA module must be configured, the VDD_MCU
net can be connected to enable PC communications by adding a jumper to J7 pins 9 and 10.
Jumpers must be connected to both J7: 910 and J22: 24 to be able to communicate with the
NINA module from a PC. If possible, the EVB power configuration should be switched to the
default 3.3 V configuration, as connecting an extra board peripheral might deplete the battery.
Less than 3 V voltage level at VCC and VCC_IO has negative impact on Tx output power.
Do not connect jumpers J7: 56 and J7: 78 at the same time while a battery is connected. This
might cause damage to the battery.
Figure 10: Jumper positions for battery powered operation - with optional jumpers shown as dashed lines
Connector
Add jumper to pins
Description
J7
5, 6
Selects the battery connected to the battery holder as source for the VDD_NINA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the NINA module. The NINA VCC and VCC_IO pins are connected to the
selected source for the VDD_NINA net.
2, 4
(Optional) Powers up the peripherals directly connected to NINA such as LEDs and
external memory with the NINA supply voltage.
Table 4: Jumper positions for battery powered operation with two optional jumpers
J7
BOARD
BATT
3V3
34
2 1
J22
VCC_IO
VCC
5
6
9
10
NINA module powerboard I/O power
(optional)
J22: 2-4 J22: 1-3
PC communication
(optional)
MCU
J7: 9-10
Battery powered
J7: 5-6

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Battery powered with protection diode, 2.71.71 V
This use case is meant to protect the battery from current back surges. There is a risk that the applied
typically damage
a non-chargeable battery. To prevent damage and block any back current surges, a Schottky diode is
added in series to the battery. A jumper should be added to J7 pins 3 and 4 instead of 5 and 6.
Less than 3 V voltage level at VCC and VCC_IO has negative impact on Tx output power.
The diode will lower the voltage level of the battery by about 0.3 V.
Figure 11: Jumper positions for battery powered operation with a protection diode (dashed lines show optional jumpers)
Connector
Add jumper to pins
Description
J7
3, 4
Selects the diode protected battery as a source for the VDD_NINA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the NINA module. The NINA VCC and VCC_IO pins are connected to the
selected source for the VDD_NINA net.
2, 4
(Optional) Powers up the peripherals directly connected to NINA such as LEDs and
external memory with the NINA supply voltage.
Table 5: Jumper positions for battery powered operation with a protection diode (with two optional jumpers)
J7
BOARD
BATT DIODE
3V3
34
2 1
J22
VCC_IO
VCC
3
4
9
10
NINA module powerboard I/O power
(optional)
J22: 2-4 J22: 1-3
PC communication
(optional)
MCU
J7: 9-10J7: 3-4
Battery powered
with protection

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External supply, 1.71- 3.60 V
When measuring current consumption or performing other NINA-B50 module characterization
measurements, it can be useful to power the module with an external source such as a lab power
supply. In such cases, all jumpers can be removed, and the required supply nets can be fed externally
by connecting to the pin headers. For example, the NINA-B50 module can be powered by connecting
an external supply directly to the J22 pin 1 and GND. See also Using an external power supply or power
analyzer.
Make sure that unpowered parts of the board are properly isolated from the NINA module. If a
voltage is applied to the signal of an unpowered device/component, current might leak through
various protection circuits of this device. This might give false readings when measuring current
consumption. Isolation can be achieved by removing NINA signal jumpers. See also
Disconnecting NINA signals from board peripherals.
Figure 12 below shows a few optional jumper connections that can be helpful when supplying the
module with an external supply.
Figure 12: Optional jumper positions while using an external power supply
Connector
Add jumper to pins
Description
J7
7, 8
(Optional) Selects the board regulated 3.3 V net as a source for the VDD_NINA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
3, 4
(Optional) Powers up the peripherals directly connected to NINA such as LEDs and
external memory with the selected source for the VDD_NINA net.
Table 6: Optional jumper positions while using an external supply
J7
BOARD
NINA
3V3
34
J22
7
8
9
10
board I/O power
(optional)
J22: multiple
PC communication
(optional)
MCU
DC/DC
EVB powered
(optional)
J7: 9-10J7: 7-8
VCC_IO
VCC
12
56 GND
-.-- V
External supply

EVK-NINA-B50 - User guide
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Raspberry Pi HAT
When connecting a HAT to the Raspberry Pi interface, use the jumper configuration shown in
Figure 13. Depending on how the NINA module is to communicate with a test PC over USB or with the
HAT, the VDD_MCU net could be left unpowered.
The 3V3_PI supply net must only be powered when connecting to a Raspberry Pi expansion
board (HAT). If connecting to a Raspberry Pi board, the jumper must be disconnected.
Figure 13: Jumper configuration when connected to a Raspberry Pi HAT (dashed lines show optional jumpers)
Connector
Add jumper to pins
Description
J7
1,2
Connects the 3V3_PI net to the regulated 3.3 V supply.
7, 8
Selects the board regulated 3.3 V net as a source for the VDD_NINA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the NINA module. The NINA VCC and VCC_IO pins are connected to the
selected source for the VDD_NINA net.
2, 4
(Optional) Powers up the peripherals directly connected to NINA such as LEDs and
external memory with the NINA supply voltage.
Table 7: Jumper configuration when connected to a Raspberry Pi HAT
3.2 Disconnecting NINA signals from board peripherals
All evaluation board peripherals, such as level shifters, LEDs, and the interface MCU are connected to
the NINA-B50 module by default. This might not suit all evaluation scenarios.
All peripherals can be switched off by disconnecting their power supplies (see also Selecting the power
configuration jumpers) but finer control is needed to isolate specific signals. Consequently, all NINA
module signals that are connected to board peripherals are routed through jumper headers. In this
way, jumpers can be added or removed to isolate or connect specific signals. Figure 14 shows the
layout of the jumper headers.
J7
BOARD
RASP PI 3V3
3V3
34
2 1
J22
VCC_IO
VCC
1
2
9
10
NINA module powerboard I/O power
(optional)
J22: 2-4 J22: 1-3
PC communication
(optional)
MCU
J7: 9-10
NINA
7
8
DC/DC
EVB powered
J7: 7-8
HAT
Raspberry Pi
expansion board
J7: 1-2
3V3

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Figure 14: Jumper headers J19 and J9 that are used to isolate specific NINA signals
Connector
Pin no.
Schematic net name
Description
J19
1
RESET_N
NINA reset signal, active low
2
RESET_N_I

3
SWDIO
SWD data signal
4
SWDIO_I
Interface MCU SWD data signal, used to program/debug the NINA module
5
SWDCLK
SWD clock signal
6
SWDCLK_I
Interface MCU SWD data signal, used to program/debug the NINA module
7
GPIO_8
GPIO or TRACE
8
BLUE
RGB diode blue signal, active low
9
GPIO_7/
SWITCH_1
GPIO, can be used as either user LED output or push-button input
10
GREEN
RGB diode green signal, active low
11
GPIO_1
GPIO, can be used as user LED output
12
RED
RGB diode red signal, active low
J9
1
GPIO_16/
UART_DTR
analog capable GPIO signal
2
UART_DTR_I
UART to USB DTR signal
3
GPIO_17/
UART_DSR
analog capable GPIO signal
4
UART_DSR_I
UART to USB DSR signal
5
GPIO_20/
UART_RTS
analog capable GPIO signal
6
UART_RTS_I
UART to USB RTS signal
7
GPIO_21/
UART_CTS
GPIO signal
8
UART_CTS_I
UART to USB CTS signal
9
GPIO_22/
UART_TXD
GPIO signal
10
UART_TXD_I
UART to USB TXD signal
11
GPIO_23/
UART_RXD
analog capable GPIO signal
12
UART_RXD_I
UART to USB RXD signal
Table 8: Pinout of the jumper headers - J19 and J9