Get Started with the KITFS85FRDMEVM

This page will assist you in learning about your KITFS85FRDMEVM board.

2. Get to know the hardware

2.1 Board features

  • VBAT power supply connectors (Jack and Phoenix)
  • VPRE output capability up to 6.0 A (external MOSFET)
  • VBUCK1/2 in Standalone (default) or Multiphase mode, up to 3.6 A peak
  • VBUCK3 up to 3.6 A peak
  • VBOOST 5.0 V or 5.74 V, up to 400 mA
  • LDO1 and LDO2, from 1.1 V to 5.0 V, up to 400 mA
  • Ignition key switch
  • FS0B external safety pin
  • Embedded USB connection for easy connection to software GUI (access to SPI/I2C bus, IOs, RSTB, FS0B, INTB, Debug, MUX_OUT, regulators)
  • LEDs that indicate signal or regulator status
  • Support OTP fuse capabilities
  • USB connection for register access, OTP emulation and programming

2.2 Board description

The KITFS85FRDMEVM provides flexibility to play with all the features of the device and make measurements on the main part of the application. The KL25Z MCU installed on the board, combined with the FlexGUI software allows access to the registers in read and write mode. All regulators are accessible through connectors. Nonuser signal, like DC/ DC switcher node is mapped on test points. Digital signals (SPI, I2C, RSTB, etc.) are accessible through connectors. Pin WAKE1 pin has a switch to control (Ignition) them. A VBAT switch is available to power On or Off the device.

This board can be operated in Emulation mode or in OTP mode. In emulation mode, as long as the power is supplied, the board configuration stays valid. The OTP mode uses the fused configuration. The device can be fused three times. In OTP mode, the device always starts with the fused configuration, except if the user wants to overwrite OTP configuration using Emulation mode. This board is able to fuse the OTP without any extra tools or board.

2.3 Board components

Overview of the KITFS85FRDMEVM evaluation board

  1. VBAT Jack connector
  2. VBAT three position switch
  3. VBAT Phoenix connector
  4. LDO1/LDO2 power supplies
  5. VPRE power supply
  6. BUCK1/BUCK2 power supply
  7. USB connector (for FlexGUI control)
  8. Debug connectivity
  9. Programming
  10. Wake1 switch
  11. OTP burning voltage switch
  12. VBOOST and BUCK3 power supply
  13. DEBUG voltage source
  14. FIN frequency selection

Table 1. Evaluation board component descriptions

Number Description
1 VBAT Jack connector
2 VBAT three position switch
  • Left position: board supplied by Jack connector
  • Middle position: board not supplied
  • Right position: board supplied by Phoenix connector
3 VBAT Phoenix connector
4 LDO1/LDO2 power supply
5 VPRE power supply
6 BUCK1/BUCK2 power supply
7 USB connector (for FlexGUI control)
8 Debug connectivity. Access to:
  • FCCUx
  • WAKE2
  • VMONx
9 Programming
  • SPI bus
  • I2C-bus
  • Debug pin
10 WAKE1 switch
11 OTP burning voltage switch
12 VBOOST and BUCK3 power supply
13 Debug voltage source either from USB (recommended) or from VSUP
14 FIN frequency selection

2.4 Additional board support

Refer to UM11157, KITFS85FRDMEVM evaluation board user manual for additional details on the featured components.

3. Configure the hardware


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

  1. Install jumpers for the configuration.

    Table 2. Jumper configuration

    Jumper Configuration
    J9 connect 1-2 (connect 5.0 V on DBG pin from the USB)
  2. Configure switches for the configuration.

    Table 3. Switch configuration

    Switch Configuration
    SW3 middle position (VBAT off))
    SW1 open (OTP programming Off)
    SW2 open (WAKE1)
  3. Connect the Windows PC USB port to the KITFS85FRDMEVM development board using the provided USB 2.0 cable.
    Set the DC power supply to 12 V and current limit to 1.0 A. With power turned Off, attach the DC power supply positive and negative output to KITFS85FRDMEVM VBAT Phoenix connector (J1).
  4. Turn On the power supply.
  5. Close SW2.

Note: At this step, the product is in Debug mode and all regulators are turned Off. The user can then power up with OTP configuration or configure the mirror registers before power up. Power up is effective as soon as J9 jumper is removed.

3.1 Additional board support

Refer to UM11157, KITFS85FRDMEVM evaluation board user manual for additional details on the hardware configuration.

4. 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.

4.1 Install the Java JRE

  1. Download Java JRE (Java SE Runtime Environment), available at (8u162 or newer).
  2. Open the installer and follow the installation instructions.
  3. Following the successful installation, restart the computer.

4.2 Install Windows 7 FlexGUI driver

On Windows 7 PCs, a virtual COM port installation is required. Install the Windows 7 FlexGUI driver using the following procedure.

Note: On Windows 10, it is not necessary to install virtual com port as Windows 10 uses a generic COM port driver.

  1. Connect the kit to the computer as described in Section 3 "Configure the hardware."
  2. On the Windows PC, open the Device Manager.
  3. In the Device Manager window, right-click on SECON FLEX GUI SLAVE and then select Properties.
  5. In the SECON FLEX GUI SLAVE Properties window, click Update Driver.
  7. In the Update Software Driver window, select Browse my computer for driver software.
  9. Select Let me pick from a list of device drivers on my computer and then click Next.
  11. Select Ports (COM & LPT) from the list and then click Next.
  13. Click Have Disk.
  15. Click Browse.
  17. In the Locate File window, locate and select fsl_ucwxp and then click Open.
  19. In the Install from Disk window, click OK.
  21. If prompted, in the Windows Security window, click Select this driver software anyway.
  23. Close the window when the installation is complete.
  25. In the Virtual Com Port Properties window, verify that the device is working properly and then click Close.

The Virtual Com Port appears in the Device Manager window.


4.3 Install FlexGUI software package

The FlexGUI software installation requires only extracting the zip file in a desired location.

  1. If necessary, install the Java JRE and Windows 7 FlexGUI driver.
  2. Download the latest FlexGUI (32-bit or 64-bit) version, available at
  3. Extract all the files to a desired location on your PC.

FlexGUI is started by running the batch file, \bin\flexgui-app-fs85.bat.

4.4 Additional board support

Refer to UM11157, KITFS85FRDMEVM evaluation board user manual for additional software details.

4.5 Ready to use

Start embedded application development.

5. Learn more

5.1 Product summary page

The product summary page for FS8400/FS8500 is available at:

5.2 Tool summary page

The tool summary page for KITFS85FRDMEVM board is at

The page provides overview information, technical and functional specifications, ordering information, documentation and software. The Get Started provides quick-reference information applicable to using the KITFS85FRDMEVM board, including the downloadable assets.

5.3 References

In addition to our FS8400/FS8500 Safety System Basis Chip for S32 microcontrollers, you may also want to visit:

Product pages:

Application pages:

Freedom pages:

Hardware pages:

Software pages:

5.4 Buy the board

KITFS85FRDMEVM: Evaluation board for FS84/FS85 Safety System Basis Chip for S32 Microcontrollers