FRDM-MCXW23
Overview
The FRDM-MCXW23 is a compact and scalable development board featuring the MCX W23 Bluetooth Low Energy (LE) 5.3 wireless MCU. The board is ideal for prototyping battery-powered, miniaturized devices within portable medical, home appliance and automation, and asset tracking applications. Equipped with an on-board accelerometer, temperature sensor, data flash and LED’s, it operates from a 3V coincell with integrated buck DCDC or from the USB bus power. The board offers easy evaluation and rapid prototyping of the MCX W23 wireless MCU.
Hardware
MCXW23 Arm® Cortex®-M33 microcontroller running at up to 32 MHz
1 MB flash and 128 KB SRAM on-chip
40HVQFN package
On-board MCU-Link debugger with CMSIS-DAP
Tri-color LED
Reset, ISP, wake, and user buttons for easy testing of software functionality
NXP FXLS8974CFR3 accelerometer
P3T1755 temperature sensor
64Mbit (8MB) on board NOR FLASH
Arduino Header, mikroBUS, Pmod
For more information about the MCXW236 SoC and FRDM-MCXW23 board, see:
Supported Features
The frdm_mcxw23 board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
frdm_mcxw23/mcxw236 target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M33F CPU1 |
|
ARM architecture |
on-chip |
LPC Flexcomm node1 |
|
Clock control |
on-chip |
LPC SYSCON & CLKCTL IP node1 |
|
on-chip |
Generic fixed-rate clock provider1 |
||
Counter |
on-chip |
Driver that uses the NXP LPC RTC High resolution counter1 |
|
on-chip |
NXP MCUX Standard Timer/Counter5 |
||
DMA |
on-chip |
NXP LPC DMA controller2 |
|
Flash controller |
on-chip |
NXP (In-Application Programming) flash memory controller for the lpc55xxx family, except lpc553x1 |
|
GPIO & Headers |
on-chip |
LPC GPIO1 |
|
on-chip |
LPC GPIO port device1 |
||
on-board |
GPIO pins exposed on Mikro BUS headers1 |
||
on-board |
GPIO pins exposed on Arduino Uno (R3) headers1 |
||
Hardware information |
on-chip |
NXP LPC 128-bit Unique identifier1 |
|
I2C |
on-chip |
LPC I2C1 |
|
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
NXP Pin interrupt and pattern match engine (PINT)1 |
|
on-chip |
ARMv8-M NVIC (Nested Vectored Interrupt Controller)1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
MMU / MPU |
on-chip |
ARMv8-M MPU (Memory Protection Unit)1 |
|
MTD |
on-chip |
||
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
LPC I/O Pin Configuration (IOCON)1 |
|
on-chip |
LPC pinctrl node1 |
||
Reset controller |
on-chip |
LPC SYSCON Peripheral reset controller1 |
|
RNG |
on-chip |
Kinetis TRNG (True Random Number Generator)1 |
|
RTC |
on-chip |
NXP LPC RTC1 |
|
Sensors |
on-board |
FXLS8974 3-axis accelerometer sensor1 |
|
Serial controller |
on-chip |
LPC USART1 |
|
Timer |
on-chip |
ARMv8-M System Tick1 |
|
Watchdog |
on-chip |
LPC Windowed Watchdog Timer1 |
Connections and IOs
The MCXW23 SoC has IOCON registers, which can be used to configure the functionality of a pin.
Name |
Function |
Usage |
|---|---|---|
PIO0_20 |
GPIO |
ISP SW3 |
PIO0_6 |
SPI |
SPI MOSI |
PIO0_2 |
USART |
USART RX |
PIO0_3 |
USART |
USART TX |
PIO0_5 |
SPI |
SPI SSEL0 |
PIO0_8 |
SPI |
SPI SSEL1 |
PIO0_10 |
SPI |
SPI SCK |
PIO0_7 |
SPI |
SPI MISO |
PIO0_1 |
GPIO |
RED LED |
PIO0_4 |
GPIO |
BLUE_LED |
PIO0_0 |
GPIO |
GREEN LED |
PIO0_19 |
GPIO |
USER LED |
PIO0_18 |
GPIO |
USR SW2 |
PIO0_21 |
GPIO |
Wakeup SW5 |
PIO0_14 |
I2C |
I2C SCL |
PIO0_13 |
I2C |
I2C SDA |
PIO0_15 |
GPIO |
FXLS8974CFR3 INT1 |
PIO0_16 |
GPIO |
FXLS8974CFR3 INT2 |
PIO0_16 |
GPIO |
P3T1755 INT2 |
System Clock
The MCXW23 SoC is configured to use FRO running at 32 MHz as a system clock source.
Serial Port
The MCXW23 SoC has 3 FLEXCOMM interfaces for serial communication. One is configured as USART for the console, one is configured for I2C, and the other one is configured for SPI.
Programming and Debugging
The frdm_mcxw23 board supports the runners and associated west commands listed below.
| flash | debug | debugserver | rtt | attach | |
|---|---|---|---|---|---|
| jlink | ✅ | ✅ | ✅ | ✅ | ✅ |
| linkserver | ✅ (default) | ✅ (default) | ✅ | ✅ | |
| pyocd | ✅ | ✅ | ✅ | ✅ | ✅ |
Build and flash applications as usual (see Building an Application and Run an Application for more details).
Configuring a Debug Probe
A debug probe is used for both flashing and debugging the board. This board is configured by default to use the MCU-Link CMSIS-DAP Onboard Debug Probe.
Using LinkServer
Linkserver is the default runner for this board, and supports the factory
default MCU-Link firmware. Follow the instructions in
MCU-Link CMSIS-DAP Onboard Debug Probe to reprogram the default MCU-Link
firmware. This only needs to be done if the default onboard debug circuit
firmware was changed. To put the board in DFU mode to program the firmware,
short jumper JP5.
Using J-Link
There are two options. The onboard debug circuit can be updated with Segger
J-Link firmware by following the instructions in
MCU-Link JLink Onboard Debug Probe.
To be able to program the firmware, you need to put the board in DFU mode
by shortening the jumper JP5.
The second option is to attach a J-Link External Debug Probe to the
10-pin SWD connector (J12) of the board. Additionally, the jumper JP7 must
be shortened.
For both options use the -r jlink option with west to use the jlink runner.
west flash -r jlink
Configuring a Console
Connect a USB cable from your PC to J10, and use the serial terminal of your choice (minicom, putty, etc.) with the following settings:
Speed: 115200
Data: 8 bits
Parity: None
Stop bits: 1
Flashing
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b frdm_mcxw23 samples/hello_world
west flash
Open a serial terminal, reset the board (press the RESET button), and you should see the following message in the terminal:
*** Booting Zephyr OS build v4.2.0-2105-g48f2ffda26de ***
Hello World! frdm_mcxw23/mcxw236
Debugging
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b frdm_mcxw23 samples/hello_world
west debug
Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal:
*** Booting Zephyr OS build v4.2.0-2105-g48f2ffda26de ***
Hello World! frdm_mcxw23/mcxw236
Support Resources for Zephyr
MCUXpresso for VS Code, wiki documentation and Zephyr lab guides
NXP’s Zephyr landing page (including training resources)