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diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/system_MKL46Z4.h b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/system_MKL46Z4.h
new file mode 100644
index 0000000000..e88304711a
--- /dev/null
+++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/system_MKL46Z4.h
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+/*
+** ###################################################################
+**     Processors:          MKL46Z256VLH4
+**                          MKL46Z128VLH4
+**                          MKL46Z256VLL4
+**                          MKL46Z128VLL4
+**                          MKL46Z256VMC4
+**                          MKL46Z128VMC4
+**
+**     Compilers:           ARM Compiler
+**                          Freescale C/C++ for Embedded ARM
+**                          GNU C Compiler
+**                          IAR ANSI C/C++ Compiler for ARM
+**
+**     Reference manual:    KL46P121M48SF4RM, Rev.1 Draft A, Aug 2012
+**     Version:             rev. 2.0, 2012-12-12
+**
+**     Abstract:
+**         Provides a system configuration function and a global variable that
+**         contains the system frequency. It configures the device and initializes
+**         the oscillator (PLL) that is part of the microcontroller device.
+**
+**     Copyright: 2012 Freescale, Inc. All Rights Reserved.
+**
+**     http:                 www.freescale.com
+**     mail:                 support@freescale.com
+**
+**     Revisions:
+**     - rev. 1.0 (2012-10-16)
+**         Initial version.
+**     - rev. 2.0 (2012-12-12)
+**         Update to reference manual rev. 1.
+**
+** ###################################################################
+*/
+
+/**
+ * @file MKL46Z4
+ * @version 2.0
+ * @date 2012-12-12
+ * @brief Device specific configuration file for MKL46Z4 (header file)
+ *
+ * Provides a system configuration function and a global variable that contains
+ * the system frequency. It configures the device and initializes the oscillator
+ * (PLL) that is part of the microcontroller device.
+ */
+
+#ifndef SYSTEM_MKL46Z4_H_
+#define SYSTEM_MKL46Z4_H_                        /**< Symbol preventing repeated inclusion */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/**
+ * @brief System clock frequency (core clock)
+ *
+ * The system clock frequency supplied to the SysTick timer and the processor
+ * core clock. This variable can be used by the user application to setup the
+ * SysTick timer or configure other parameters. It may also be used by debugger to
+ * query the frequency of the debug timer or configure the trace clock speed
+ * SystemCoreClock is initialized with a correct predefined value.
+ */
+extern uint32_t SystemCoreClock;
+
+/**
+ * @brief Setup the microcontroller system.
+ *
+ * Typically this function configures the oscillator (PLL) that is part of the
+ * microcontroller device. For systems with variable clock speed it also updates
+ * the variable SystemCoreClock. SystemInit is called from startup_device file.
+ */
+void SystemInit (void);
+
+/**
+ * @brief Updates the SystemCoreClock variable.
+ *
+ * It must be called whenever the core clock is changed during program
+ * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
+ * the current core clock.
+ */
+void SystemCoreClockUpdate (void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* #if !defined(SYSTEM_MKL46Z4_H_) */