Getting Started with the KITFS26SKTEVM Evaluation Board

This page will assist you in learning about your KITFS26SKTEVM evaluation board.

Get to Know the Hardware

2.1 Board Features

  • VBAT power supply connectors (Jack and Phoenix)
  • LQFP48 burn in open top socket
  • VPRE output output voltage from 3.2 V to 6.35 V, current capability up to 1.5 A
  • VBOOST in independent mode or in front-end topology to support battery cranking profiles
  • VCORE output voltage from 0.8 V to 3.35 V, current capability up to 1.65 A
  • LDO1 and LDO2 from 3.3 V or 5.0 V, up to 400 mA
  • VTRK1 and VTRK2, from 3.3 V or 5.0 V, up to 150 mA
  • VREF 0.75 % accuracy regulator for external ADC reference
  • FS0B, FS1b external safety pins
  • USB to SPI protocol for easy connection to software GUI
  • LEDs that indicate signal or regulator status
  • Manual or Automated OTP fuse programming
  • Advance system monitoring via AMUX or external ADC
  • Analog variable resistor to test external VMON

2.2 Board Description

The KITFS26SKTEVM provides flexibility to play with all the features of the device and make measurements on the main part of the application. The KL25Z Freedom connected to the board, combined with the FS26 NXP GUI software allows to fully configure and control FS26 SBC. The LQFP48 Socket on board allows to test or to program different samples.

An FS26 SBC sample must be inserted in the socket to enable OTP programming, emulation or evaluation. The performance on this board is limited and KITFS26AEEVM must be used for further evaluation.

2.3 Board Components

Overview of the evaluation board

  1. VBAT Phoenix connector
  2. VBAT3 position switch
  3. VBAT Jack connector
  4. VDDIO selection
  5. Regulators outputs
  6. WAKE1 and WAKE2 inputs switches
  7. LQFP48 socket
  8. KL25Z Freedom headers (bottom)
  9. VDEBUG pin source selection (switch or MCU)
  10. VDEBUG pin voltage level switches
  11. VDDIO USB voltage level selection
  12. VMONEXT variable resistor
  13. Signal connector
  14. Program connector
  15. Regulators output LED indicators
  16. Program burning voltage LED indicator
  17. Safety output LED indicators

Install Software

This development kit uses FlexGUI software. FlexGUI software is based on Java JRE.

Preparing the Windows PC workstation consists of three steps.

  1. Install the appropriate Java SE Runtime Environment (JRE)
  2. Install Windows 7 FlexGUI driver
  3. Install FlexGUI software package

3.1 Flashing or updating the GUI firmware

The KITFS26SKTEVM is delivered with the GUI firmware flashed. If MCU firmware is flashed, ignore this section. If it is specified to update the firmware or it is malfunctioning, follow the instructions below.

3.1.1 Flashing Freedom board firmware from Windows 7/10

If BOOTLOADER is already loaded in the FRDM Board, steps 1 to 3 are not required. Start from step 4.

  1. Disable the Storage Service and Windows Search: Run Services, double click, and stop them as shown below
    Steps 2 and 3 are not required if BOOTLOADER is already loaded in the Freedom board
  2. Press the RST push-button and connect the USB cable into the SDA port on the Freedom board.
    A new “BOOTLOADER” device should appear on the left pane of the File explorer.
  3. Drag and drop the file “MSD-DEBUG-FRDM-KL25Z_Pemicro_v118.SDA” to the BOOTLOADER drive.
    Note: Make sure to allow enough time for the firmware to be saved in the BOOTLOADER.
  4. Disconnect and reconnect the USB cable into the SDA port.
    This time without pressing the RST push-button, FRDM_KL25Z device should appear on the left pane of the File explorer as pictured below.
  5. Locate the file “nxp-gui-fw-frdmkl25z-usb_hid-fs2630_vX.Y.bin” from the package and drag and drop the file into the FRDM_KL25Z device.
    Note: Make sure to allow enough time for the firmware to be saved.
  6. Freedom board Firmware is successfully loaded. Disconnect and reconnect the USB cable into the KL25Z USB port.

3.1.2 Installing GUI software package

To install the FS26 NXP GUI, download or obtain the NXP GUI package, unzip 1- NXP_GUI_Setup folder:


Then, double-click NXP_GUI_version-Setup.exe and follow the instructions.


To install the application on Windows PC, proceed with the following pop-up windows:

Figure 1. Application Setup

Figure 1. Application Setup

Figure 2. License Agreement

Figure 2.License Agreement

Figure 3. Select FS2630_GUI

Figure 3.Select FS2630_GUI

Figure 4. Choose the folder to install

Figure 4. Choose the folder to install

Select the following options before completing the installation of the setup:

  • Run NXP_GUI
  • Show Readme

Select Finish to complete the installation.

Figure 5. Run NXP_GUI

Figure 5. Run NXP_GUI

When the installation is finished, you can find the application by searching for NXPGUI in the windows search bar. Click to launch.

Configure the hardware

Figure 6. Typical initial configuration

Figure 6. Typical initial configuration

To configure the hardware and workstation, complete the following procedure:

  1. With board disconnected, push and insert a FS26 device in the socket. Pin 1 is on the top left of the socket
  2. With SW1 in middle position, set DC power supply to 12 V and current limit to 1.0 A. Attach the DC power supply positive and negative output to KITFS26SKTEVM VBAT Phoenix connector (J20). Or connect 12 V power supply to VBAT Jack (J21)

Table 1. VBAT Phoenix connector (J20)

Schematic label Signal name Description
J20-1 VBAT Battery voltage supply input
J20-2 GND Ground

Table 2. VBAT three position connector (SW1)

Schematic label Signal name Description
SW1 pin 2-3 VBAT Phoenix Board supplied by Phoenix connector
SW1 pin 2 (middle position) VBAT Board not supplied
SW1 pin 2-1 VBAT jack Board supplied by Jack connector
  1. Connect the Windows PC USB port to the KL25Z USB side of the freedom board included in the kit, using the provided USB 2.0 cable.
  2. Turn on SW6 to apply VDBG to the DEBUG pin or SW7 to apply VOTP.
  3. Turn on the power supply
  4. Close SW1

Get Help


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