FRDM-MCXN236

Board Overview

FRDM-MCXN236

Vendor:

NXP Semiconductors

Architecture:

arm

SoC:

mcxn236

Overview

FRDM-MCXN236 are compact and scalable development boards for rapid prototyping of MCX N23X MCUs. They offer industry standard headers for easy access to the MCUs I/Os, integrated open-standard serial interfaces, external flash memory and an on-board MCU-Link debugger. MCX N Series are high-performance, low-power microcontrollers with intelligent peripherals and accelerators providing multi-tasking capabilities and performance efficiency.

Hardware

• MCX-N236 Arm Cortex-M33 microcontroller running at 150 MHz

• 1MB dual-bank on chip Flash

• 352 KB RAM

• USB high-speed (Host/Device) with on-chip HS PHY. HS USB Type-C connectors

• 8x LP Flexcomms each supporting SPI, I2C, UART

• 2x FlexCAN with FD, 2x I3Cs, 2x SAI

• On-board MCU-Link debugger with CMSIS-DAP

• Arduino Header, FlexIO/LCD Header, SmartDMA/Camera Header, mikroBUS

For more information about the MCX-N236 SoC and FRDM-MCXN236 board, see:

• MCX-N236 SoC Website

• MCX-N236 Datasheet

• MCX-N236 Reference Manual

• FRDM-MCXN236 Website

• FRDM-MCXN236 User Guide

• FRDM-MCXN236 Board User Manual

• FRDM-MCXN236 Schematics

Supported Features

The FRDM-MCXN236 board configuration supports the following hardware features:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
SYSTICK	on-chip	systick
PINMUX	on-chip	pinmux
GPIO	on-chip	gpio
UART	on-chip	serial port-polling; serial port-interrupt
SPI	on-chip	spi
I2C	on-chip	i2c
CLOCK	on-chip	clock_control
FLASH	on-chip	soc flash
WATCHDOG	on-chip	watchdog
VREF	on-chip	regulator
ADC	on-chip	adc
LPCMP	on-chip	sensor(comparator)
FLEXCAN	on-chip	CAN
FLEXIO	on-chip	flexio
DISPLAY	on-chip	flexio; MIPI-DBI. Tested with NXP LCD_PAR_S035 TFT LCD Module
LPTMR	on-chip	counter

Targets available

The default configuration file boards/nxp/frdm_mcxn236/frdm_mcxn236_defconfig

Other hardware features are not currently supported by the port.

Connections and IOs

The MCX-N236 SoC has 6 gpio controllers and has pinmux registers which can be used to configure the functionality of a pin.

Name	Function	Usage
P0_PIO1_8	UART	UART RX
P1_PIO1_9	UART	UART TX

System Clock

The MCX-N236 SoC is configured to use PLL0 running at 150MHz as a source for the system clock.

Serial Port

The FRDM-MCXN236 SoC has 8 FLEXCOMM interfaces for serial communication. Flexcomm 4 is configured as UART for the console.

Programming and Debugging

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_mcxn236 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 v3.6.0-4478-ge6c3a42f5f52 ***
Hello World! frdm_mcxn236/mcxn236

Debugging

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b frdm_mcxn236/mcxn236 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 v3.6.0-4478-ge6c3a42f5f52 ***
Hello World! frdm_mcxn236/mcxn236

Troubleshooting

Using Segger SystemView and RTT

Note that when using SEGGER SystemView or RTT with this SOC, the RTT control block address must be set manually within SystemView or the RTT Viewer. The address provided to the tool should be the location of the _SEGGER_RTT symbol, which can be found using a debugger or by examining the zephyr.map file output by the linker.

The RTT control block address must be provided manually because this SOC supports ECC RAM. If the SEGGER tooling searches the ECC RAM space for the control block a fault will occur, provided that ECC is enabled and the RAM segment being searched has not been initialized to a known value.