NXP Semiconductors KW45B41Z-EVK Manuale utente
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Rev. 2 — 13 February 2023 User manual
Document information
Information Content
Keywords KW45B41Z-EVKUM, KW45B41Z-EVK, KW45B41Z, Bluetooth LE 5.3, CAN FD, LIN
Abstract The KW45B41Z-EVK board is a highly configurable, low-power, and cost-effective, evaluation and
development platform for NXP KW45B41Z MCU, which is a low-power, highly secure, single-chip
wireless MCU supporting Arm Cortex-M33 core
NXP Semiconductors KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
1 KW45B41Z-EVK overview
The KW45B41Z-EVK board is a highly configurable, low-power, and cost-effective, evaluation and development
platform for NXP KW45B41Z microcontroller (MCU), which is a low-power, highly secure, single-chip wireless
MCU supporting Arm Cortex-M33 core. It offers an easy-to-use user interface with a virtual serial port and
standard programming and run-control capabilities.
The KW45B41Z MCU includes a 96 MHz Arm Cortex-M33 CPU, a radio transceiver operating in the 2.4 GHz
frequency band (supporting GFSK modulations for Bluetooth Low Energy (LE) 5.3), Bluetooth LE controller
stack, transceiver drivers, up to 1 MB flash, up to 128 KB SRAM, and peripherals optimized to meet the
requirements of target applications. The KW45B41Z MCU supports multiprotocol use cases with Matter, Thread,
Zigbee, Bluetooth LE, and CAN FD for IoT, industrial, and automotive applications.
The KW45B41Z-EVK board provides RF circuitry (including antenna), CAN and LIN transceivers, 16 Mbit
QSPI NOR flash memory, accelerometer, and 32 MHz crystal. It is compatible with the Arduino UNO R3 and
Mikroe click boards. The board is a standalone PCB that supports application development with GFSK libraries
from NXP. It can be used with a wide range of development tools, including NXP MCUXpresso IDE and IAR
Embedded Workbench. The board is lead-free and RoHS-compliant.
For debugging the KW45B41Z MCU, the KW45B41Z-EVK board uses an onboard debug probe, known as
MCU-Link OB (OB stands for "onboard"), which is based on another MCU, LPC55S69. For simplicity, MCU-
Link OB is referred to as "MCU-Link debug probe" or just "MCU-Link" and the KW45B41Z MCU is referred to as
"target MCU" in this document.
This document provides details about the KW45B41Z-EVK board interfaces, power supplies, clocks, push
buttons, jumpers, and LEDs.
Note: For information on the operating temperature range for the board, see Board operating conditions.
1.1 Radio Equipment Directive compliance information
The following information is provided per Article 10.8 of the Radio Equipment Directive 2014/53/EU:
•Frequency bands in which the equipment operates
•The maximum RF power transmitted
Part number RF technology Frequency ranges (EU) Maximum transmitted power
KW45B41Z-EVK Bluetooth LE 2360 MHz – 2483 MHz +10 dBm
EUROPEAN DECLARATION OF CONFORMITY (Simplified DoC per Article 10.9 of the Radio Equipment
Directive 2014/53/EU)
This apparatus, namely KW45B41Z-EVK Development Platform, conforms to the Radio Equipment Directive
2014/53/EU. The full EU Declaration of Conformity for this apparatus is available at European Union Declaration
of Conformity for KW45B41Z-EVK Evaluation Kit.
1.2 Acronyms and abbreviations
Table 1 lists and explains the acronyms and abbreviations used in this document.
Term Description
4PDT Four pole double throw
ADC Analog-to-digital converter
Table 1. Acronyms and abbreviations
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NXP Semiconductors KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Term Description
CAN Controller area network
DNP Do not populate
FD Flexible data-rate
GFSK Gaussian frequency shift keying
GND Ground
GPIO General-purpose input/output
GPO General-purpose output
HID Human interface device
HMI Human–machine interaction
HS High-speed
I2C Inter-integrated circuit
IDE Integrated development environment
IoT Internet of things
ISP In-System Programming
LE Low Energy
LED Light-emitting diode
LIN Local interconnect network
LPI2C Low-Power Inter-Integrated Circuit
LPSPI Low-Power Serial Peripheral Interface
LPUART Low-Power Universal Asynchronous Receiver/Transmitter
MCU Microcontroller unit
NC Not connected
NMI Non-maskable interrupt
OS Operating system
OTA Over-the-air
PCS Peripheral chip select
PER Packet error rate
PMIC Power management integrated circuit
POR Power-on reset
ppm Parts per million
PWM Pulse width modulation
QSPI Quad serial peripheral interface
RTC Real-time clock
SMA Subminiature version A
SPI Serial peripheral interface
SWD Serial wire debug
Table 1. Acronyms and abbreviations...continued
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NXP Semiconductors KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Term Description
SWO Serial wire debug trace output
TCXO Temperature compensated crystal oscillator
UART Universal asynchronous receiver/transmitter
USB Universal serial bus
USBSIO USB serial input/output
UWB Ultra-wideband
VCOM Virtual communication
WUU Wake-up unit
Table 1. Acronyms and abbreviations...continued
1.3 Related documentation
Table 2 lists and explains the additional documents and resources that you can refer to for more information on
the KW45B41Z-EVK board. Some of the documents listed below may be available only under a non-disclosure
agreement (NDA). To request access to these documents, contact your local field applications engineer (FAE)
or sales representative.
Document Description Link / how to access
KW45 Reference Manual Intended for system software and hardware
developers and application programmers who want to
develop products with KW45B41Z MCU
KW45RM.pdf
KW45 Product Family Data Sheet Provides information about electrical characteristics,
hardware design considerations, and ordering
information
KW45.pdf
Hardware Design Considerations for
KW45B41Z and K32W148 Bluetooth LE
Devices (AN13227)
Provides PCB design considerations for new designs
based on NXP KW45B41Z and K32W148 MCUs
AN13227.pdf
KW45B41Z-EVK RF System Evaluation
Report for Bluetooth Low Energy
Applications (AN13228)
Describes the KW45B41Z-EVK board RF system
evaluation report for Bluetooth LE applications
AN13228.pdf
KW45B41Z-EVK Co-existence with RF
System Evaluation Report for Bluetooth
Low Energy Application (AN13229)
Provides the RF evaluation test results of the KW45
B41Z-EVK board for Bluetooth LE applications (2FSK
modulation)
AN13229.pdf
LPC55S6x/LPC55S2x/LPC552x User
manual (UM11126)
Intended for system software and hardware
developers and application programmers who want
to develop products with LPC55S6x/LPC55S2x/
LPC552x MCU
UM11126.pdf
Table 2. Related documentation
1.4 Board kit contents
The KW45B41Z-EVK board kit contains the following items:
•KW45B41Z-EVK board hardware assembly
•A USB cable
•Spare jumpers
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NXP Semiconductors KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
1.5 Block diagram
Figure 1 shows the KW45B41Z-EVK block diagram.
KW45B41Z
Auto-qualified
package
PWM
X3
MCU-Link
JTAG
SWD
Reset
SW1 Red LED SWD
CAN PHY
P5V_CAN
P12V_VBAT LIN PHY
CAN connector
LIN connector
Arduino Uno R3
mikroBUS I/O headers
SMA
connector
Printed
inverted-F
antenna
NMI
SW2
WUU
SW3
NMI
QSPI NOR
flash memory
SPI
Ranger 4
connectors
J5-J6
SPI
RF
I/O I/O
J3 J4 I/O headers
CAN
LIN
I/O I/O
32 MHz
SWD
UART/
SPI/
I2C
USB
micro-B
Arduino Uno R3 I/O headers
J2
J1
mikroBUS I/O headers
CAN/LIN
P12V
Accelerometer
Blue LED
GPIO
I2C
32.768 kHz I/O
I/O
I/O I/O
Lithium-ion/
external battery
header
VBAT
CR2032
5 V - 9 V
P5V
PMIC
Power selector
FL_USB_5V0
3V3 LDO
SWD
Wake-up
SW5
J12
J13
Boot config
SW4
Figure 1. KW45B41Z-EVK block diagram
1.6 Board features
Table 3 describes the features of the KW45B41Z-EVK board.
Board feature Target MCU feature used Description
MCU (target MCU) KW45B41Z MCU with Arm Cortex-M33 core running at a
frequency of up to 96 MHz
Note: For more details on the KW45B41Z MCU, see KW45
Product Family Data Sheet and KW45B41Z Reference
Manual.
CAN FlexCAN module (CAN0) A high-speed CAN transceiver for driving CAN signals
between the target MCU and a 1x4 pin header
Table 3. KW45B41Z-EVK features
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Board feature Target MCU feature used Description
LPUART/LIN Two LPUART modules (LPUART0
and LPUART1)
•LPUART0:
–Connects to a 1x4 pin LIN header through a LIN
transceiver for an external LIN connection
–Connects to one of the two mikroBUS socket connectors
for an external UART connection
–Connects to one of the four Arduino socket connectors
for an external UART connection
–Can be used for MCU-Link connection in place of
LPUART1
•LPUART1:
–Supports a USB-to-UART bridge for connecting MCU-
Link to the target MCU
–Connects to another Arduino socket connector for an
external UART connection
–Can be used for LIN connection in place of LPUART0
LPSPI One of the two LPSPI modules
(LPSPI1) with four peripheral chip
selects (PCS0, PCS1, PCS2, and
PCS3)
•PCS0: Connects to 16 Mbit QSPI NOR flash memory,
which supports over-the-air (OTA) programming
•PCS1: Connects to one of the two Ranger 4 socket
connectors
•PCS2: Connects to one of the four Arduino socket
connectors
•PCS3:
–Supports a USB-to-SPI bridge for connecting MCU-Link
to the target MCU
–Provides an alternative SPI connection to PCS0
connection
–Provides an alternative SPI connection to PCS2
connection
–Connects to one of the two mikroBUS socket connectors
LPI2C One of the two LPI2C modules (LPI2
C1)
LPI2C1 module connects to:
•MCU-Link through a USB-to-I2C bridge connecting MCU-
Link to the target MCU
•Power management integrated circuit (PMIC)
•Accelerometer
•One of the two mikroBUS socket connectors
•One of the four Arduino socket connectors
RF 2.4 GHz radio A PCB-integrated inverted-F antenna and an SMA connector
for RF operation
Accelerometer 3-axis, 12-bit, compact digital accelerometer
mikroBUS mikroBUS socket with two 1x8 position receptacles
Arduino Arduino UNO board compatible socket with four receptacles
(1x8, 1x10, 1x8, and 1x6 positions)
Ranger 4 Ranger 4 UWB board compatible socket with two
receptacles (2x10 and 2x8 positions)
MCU-Link USB USB 2.0 micro-B connector for creating MCU-Link high-
speed USB connection to the host computer, and providing 5
V power to the board
Table 3. KW45B41Z-EVK features...continued
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Board feature Target MCU feature used Description
Power supply •The board can be powered up through:
–Coincell battery
–USB micro-B connector
–DC power jack
–CAN header
–LIN header
–Arduino socket power connector
–VBAT header (DNP)
•Following power configuration modes are supported:
–DC-DC Converter with Buck mode
–DC-DC Converter with Bypass mode
–PMIC mode
–Smart Power Switch mode
Clock The target MCU receives the following two clocks:
•A 32 MHz clock from a crystal for Arm core and radio.
Alternatively, the 32 MHz clock can be provided from a
TCXO (not populated on the board).
•A 32.768 kHz clock from another crystal as RTC and low-
power RF clock
Debug •Onboard MCU-Link debug probe with CMSIS-DAP and
SEGGER J-Link protocol options. It can connect to the
target MCU through a USB-to-UART, USB-to-SPI, or USB-
to-I2C bridge.
•10-pin Arm JTAG/SWD connector for connecting an
external debug probe
Table 3. KW45B41Z-EVK features...continued
1.7 Board pictures
Figure 2 shows the top-side view of the KW45B41Z-EVK board, with connectors, push buttons, and LEDs
highlighted.
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J7 (SMA)
J11
(LIN)
J10
(CAN)
J9
(power jack)
J6
(Ranger 4)
ANT1
SW3
(WUU)
SW2
(NMI)
SW1
(reset)
SW4
(target MCU boot)
J5
(Ranger 4)
J14
(USB)
J1 (Arduino DL)
J13 (mikroBUS)
J12 (mikroBUS)
J4 (Arduino AN)
J16
(SWD)
D7
LED1
LED3
LED2
D12
D16
D17
D11
D14
D15
D13
J3 (Arduino PWR)
J2 (Arduino DH)
SW5
(wake-up)
Figure 2. KW45B41Z-EVK connectors, push buttons, and LEDs (top-side view)
Figure 3 shows the jumpers of the KW45B41Z-EVK board.
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NXP Semiconductors KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
JP18
JP1
JP33 JP3
JP5 JP21
JP22
JP19
JP30
JP37
JP7
JP8
JP4
JP12
JP10
JP9
JP14
JP6
JP28
JP26
JP20
JP25
JP41 JP17
JP2 JP34
JP16
JP35
JP15
Figure 3. KW45B41Z-EVK jumpers
Figure 4 shows the bottom-side view of the KW45B41Z-EVK board, with battery holder BT2 highlighted.
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KW45B41Z-EVK Board User Manual
BT2
(battery holder)
Figure 4. KW45B41Z-EVK bottom-side view
1.8 Connectors
Table 4 describes the KW45B41Z-EVK connectors. The connectors are shown in Figure 2 and Figure 4.
Part identifier Connector type Description Reference
section
BT1 (DNP)
(secondary option)
Holder for 3 V CR2450N lithium coincell battery
BT2 (primary
option)
Coincell battery holders
Note: BT1 and BT2 have
overlapping footprints (BT2 is
used by default).
Note: CAN and LIN
transceivers do not work
when using coincell battery.
Holder for 3 V CR2032 lithium coincell battery
J8 (DNP) 1x2 pin header Lithium-ion/external battery connector
J9 DC power jack Connector for 12 V power adapter
Section 2.1
J10 1x4 pin header CAN expansion header and 12 V power source Section 2.3
J11 1x4 pin header LIN expansion header and 12 V power source Section 2.4
J14 USB 2.0 micro-B receptacle MCU-Link USB connector Section 3.3
J7 SMA connector SMA RF connector
ANT1 Antenna PCB-integrated RF antenna
Section 2.7
J12
J13
1x8 position receptacles mikroBUS socket connectors Section 2.9
Table 4. KW45B41Z-EVK connectors
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