diff --git a/README.md b/README.md
index 36dab505d7..a0cfffd4a3 100644
--- a/README.md
+++ b/README.md
@@ -242,6 +242,7 @@ User can add a STM32 based board following this [wiki](https://github.com/stm32d
 | :green_heart:  | STM32F042F4<br>STM32F042F6 | Generic Board | *2.4.0* |  |
 | :green_heart:  | STM32F042G4<br>STM32F042G6 | Generic Board | *2.4.0* |  |
 | :green_heart: | STM32F042K4T<br>STM32F042K6T | Generic Board | **2.0.1** |  |
+| :yellow_heart: | STM32F042K4U<br>STM32F042K6U | Generic Board | **2.10.0** |  |
 | :green_heart:  | STM32F042T6 | Generic Board | *2.4.0* |  |
 | :green_heart:  | STM32F048G6 | Generic Board | *2.4.0* |  |
 | :green_heart:  | STM32F048T6 | Generic Board | *2.4.0* |  |
diff --git a/boards.txt b/boards.txt
index 0aee1594ac..a635b5b2e7 100644
--- a/boards.txt
+++ b/boards.txt
@@ -2073,6 +2073,15 @@ GenF0.menu.pnum.GENERIC_F042K4TX.build.product_line=STM32F042x6
 GenF0.menu.pnum.GENERIC_F042K4TX.build.variant=STM32F0xx/F042K(4-6)T
 GenF0.menu.pnum.GENERIC_F042K4TX.debug.svd_file={runtime.tools.STM32_SVD.path}/svd/STM32F0xx/STM32F0x2.svd
 
+# Generic F042K4Ux
+GenF0.menu.pnum.GENERIC_F042K4UX=Generic F042K4Ux
+GenF0.menu.pnum.GENERIC_F042K4UX.upload.maximum_size=16384
+GenF0.menu.pnum.GENERIC_F042K4UX.upload.maximum_data_size=6144
+GenF0.menu.pnum.GENERIC_F042K4UX.build.board=GENERIC_F042K4UX
+GenF0.menu.pnum.GENERIC_F042K4UX.build.product_line=STM32F042x6
+GenF0.menu.pnum.GENERIC_F042K4UX.build.variant=STM32F0xx/F042K(4-6)U
+GenF0.menu.pnum.GENERIC_F042K4UX.debug.svd_file={runtime.tools.STM32_SVD.path}/svd/STM32F0xx/STM32F0x2.svd
+
 # Generic F042K6Tx
 GenF0.menu.pnum.GENERIC_F042K6TX=Generic F042K6Tx
 GenF0.menu.pnum.GENERIC_F042K6TX.upload.maximum_size=32768
@@ -2082,6 +2091,15 @@ GenF0.menu.pnum.GENERIC_F042K6TX.build.product_line=STM32F042x6
 GenF0.menu.pnum.GENERIC_F042K6TX.build.variant=STM32F0xx/F042K(4-6)T
 GenF0.menu.pnum.GENERIC_F042K6TX.debug.svd_file={runtime.tools.STM32_SVD.path}/svd/STM32F0xx/STM32F0x2.svd
 
+# Generic F042K6Ux
+GenF0.menu.pnum.GENERIC_F042K6UX=Generic F042K6Ux
+GenF0.menu.pnum.GENERIC_F042K6UX.upload.maximum_size=32768
+GenF0.menu.pnum.GENERIC_F042K6UX.upload.maximum_data_size=6144
+GenF0.menu.pnum.GENERIC_F042K6UX.build.board=GENERIC_F042K6UX
+GenF0.menu.pnum.GENERIC_F042K6UX.build.product_line=STM32F042x6
+GenF0.menu.pnum.GENERIC_F042K6UX.build.variant=STM32F0xx/F042K(4-6)U
+GenF0.menu.pnum.GENERIC_F042K6UX.debug.svd_file={runtime.tools.STM32_SVD.path}/svd/STM32F0xx/STM32F0x2.svd
+
 # Generic F042T6Yx
 GenF0.menu.pnum.GENERIC_F042T6YX=Generic F042T6Yx
 GenF0.menu.pnum.GENERIC_F042T6YX.upload.maximum_size=32768
diff --git a/variants/STM32F0xx/F042K(4-6)U/generic_clock.c b/variants/STM32F0xx/F042K(4-6)U/generic_clock.c
index 691a010770..021aaf16da 100644
--- a/variants/STM32F0xx/F042K(4-6)U/generic_clock.c
+++ b/variants/STM32F0xx/F042K(4-6)U/generic_clock.c
@@ -20,8 +20,42 @@
   */
 WEAK void SystemClock_Config(void)
 {
-  /* SystemClock_Config can be generated by STM32CubeMX */
-#warning "SystemClock_Config() is empty. Default clock at reset is used."
+  RCC_OscInitTypeDef RCC_OscInitStruct = {};
+  RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
+  RCC_PeriphCLKInitTypeDef PeriphClkInit = {};
+
+  /** Initializes the RCC Oscillators according to the specified parameters
+  * in the RCC_OscInitTypeDef structure.
+  */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
+  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+    Error_Handler();
+  }
+
+  /** Initializes the CPU, AHB and APB buses clocks
+  */
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
+                                | RCC_CLOCKTYPE_PCLK1;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+
+  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
+    Error_Handler();
+  }
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB | RCC_PERIPHCLK_USART1
+                                       | RCC_PERIPHCLK_I2C1;
+  PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;
+  PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_HSI;
+  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
+
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
+    Error_Handler();
+  }
 }
 
 #endif /* ARDUINO_GENERIC_* */
diff --git a/variants/STM32F0xx/F042K(4-6)U/ldscript.ld b/variants/STM32F0xx/F042K(4-6)U/ldscript.ld
new file mode 100644
index 0000000000..37f8a5fd91
--- /dev/null
+++ b/variants/STM32F0xx/F042K(4-6)U/ldscript.ld
@@ -0,0 +1,187 @@
+/*
+******************************************************************************
+**
+** @file        : LinkerScript.ld
+**
+** @author      : Auto-generated by STM32CubeIDE
+**
+** @brief       : Linker script for STM32F042K6Ux Device from STM32F0 series
+**                      32KBytes FLASH
+**                      6KBytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2025 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  RAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = LD_MAX_DATA_SIZE
+  FLASH    (rx)    : ORIGIN = 0x8000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab (READONLY) : /* The "READONLY" keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+  {
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM (READONLY) : /* The "READONLY" keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+  {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array (READONLY) : /* The "READONLY" keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .init_array (READONLY) : /* The "READONLY" keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .fini_array (READONLY) : /* The "READONLY" keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data :
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+    *(.RamFunc)        /* .RamFunc sections */
+    *(.RamFunc*)       /* .RamFunc* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM AT> FLASH
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}

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