TWR-K22F120M

This Freescale tower board is based on the K22FN512VDC12 which is a 120MHz device from the performance and integration K22 family with Cortex-M4 core and USB. This K22 device has 512k Flash and 128k SRAM and is in an 121 pin MAPBGA thin-profile package, whereby the K22 is also available in 64, 80, or 144 pin housings and its memory ranges from 128k...1M Flash with 24k...128k SRAM (100MHz and 120MHz parts). There is an 8MHz crystal on the board for clocking the part. The K22 supports crystal-less FS USB device based on its internal 48MHz IRC48M oscillator and USB clock recovery.

Full details and documentation for this board can be obtained from the Freescale web site: TWR-K22F120M

To configure the µTasker project for this board simply enable the define TWR_K22F120M in the project's config.h file. The compiler needs to be set to build for Cortex M4 (and not Cortex M0+) and the linker script K_512_128.ld should be selected [K_512_128_BM.ld for downloadable version] {the linker script extension may vary for different compilers, whereby *.ld is valid for GCC}

TWR-K22F120M Binaries

Here are some binary files that can be loaded to the board. These were built using the µTasker applications (serial loader and V1.4 application) and can be simply generated using the supported compilers/IDEs [these were built using GCC], built using different configuration options or modified to suit specific requirements or hardware derived from this board :

  • uTaskerSerialBoot_TWR-K22F120M_KBOOT_HID_UART_MSD.bin KBOOT compatible USB-HID loader with composite USB-MSD loading, as well as KBOOT UART loading on UART 1 at 57'600 Baud [16.0k] allowing applications to be loaded at link address 0x8080 (using Freescale's KBOOT USB connection, or KBOOT UART at 57'600 Baud or USB-MSD when the board appears as upload hard disk). When operating, the green LED blinks at 5Hz. To force the loader reset the board with push button SW1 held down. To disable the watchdog reset the board with push button SW2 held down. This can be loaded using the TWR-K22F120M's USB-MSD (OpenSDA) boot loader. Note that the loader limits application sizes to 70k - it can be built without limits using the µTasker project. The USB device operation uses the crystal-less USB mode.
  • uTaskerV1.4.8_BM_TWR-K22F120M_8080.bin TWR-K22F120M application with command-line menu on the virtual COM connection (115'200 Baud) with various menu items (as well as on UART1), including the ability to switch to USB-UART-1 bridge mode with end-to-end flow control. Output from the on-board accelerometer can be viewed in the I2C menu. Low power modes can be set in the application menu (when LLS has been entered, pressing the push button SW1 will wake and return to the fully functional mode - more details of this operation can be found in Low-Leakage Wakeup (LLWU) Support). The USB device is a composite USB-CDC with three interfaces, whereby the first is connected to the command line shell (in the USB menu it is possible to command a bridging mode to UART1). The second performs full-time USB-UART bridging to UART0 (Tx = PTA15, Rx = PTA14). The third performs full-time USB-UART bridging to UART2 (Tx = PTD3, Rx = PTD2). Drivers that can be used for this device are available below. The processor runs at 120MHz and the USB device makes use of the crystal-less mode. [40.8k].
    Linked to 0x8080, this binary image can be loaded with drag-and-drop onto the upload disk that appears when the serial loader is operating or using the KBOOT loader's USB or UART connections. When the application is running the green LED blinks at 2.5Hz.
  • uTaskerV1.4.8_TWR-K22F120M.bin The same TWR-K22F120M application as stand-alone software that can be loaded using the TWR-K22F120M's USB-MSD (OpenSDA) boot loader [41.8k].
  • software.bin. A TWR-K22F120M application that can be loaded using the USB-MSD host (memory stick) loader (see below) [24.2k].

  • uTaskerFreescaleMultiVirtualCOM.inf USB CDC installation file for 32-bit windows (usable for 1..6 USB-CDC composite interfaces).
  • uTaskerFreescaleMultiVirtualCOM_64bit.inf USB CDC installation file for 64-bit windows (usable for 1..6 USB-CDC composite interfaces). See the following for a guide to installing unsigned drivers on Windows 8.1

USB-MSD Host (Memory Stick) Loader

USB-MSD host loader for updating firmware from a memory stick.

  • uTaskerSerialBoot_TWR-K22F120M_MemStick.bin

  • Debug output is available on UART 1 (on OpenSDA virtual COM) at 115'200 Baud [26.3k]; applications to be loaded at link address 0x8080. The application "software.bin" can be loaded (see above).
    When operating, the green LED blinks at 5Hz. To force the loader reset the board with push button SW1 held down.
    To disable the watchdog, reset the board with push button SW2 held down.
    This can be loaded using the TWR-K22F120M's USB-MSD (OpenSDA) boot loader. Note that the loader limits application sizes to 64k - it can be built without limits using the µTasker project.

    Return to the Kinetis landing page


    µTasker Kinetis TWR-K22F120M support. Copyright (c) 2004..2015 M.J.Butcher Consulting