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+/*
+** ###################################################################
+**     Processors:          MK22FN512CAP12
+**                          MK22FN512VDC12
+**                          MK22FN512VFX12
+**                          MK22FN512VLH12
+**                          MK22FN512VLL12
+**                          MK22FN512VMP12
+**
+**     Compilers:           Freescale C/C++ for Embedded ARM
+**                          GNU C Compiler
+**                          IAR ANSI C/C++ Compiler for ARM
+**                          Keil ARM C/C++ Compiler
+**                          MCUXpresso Compiler
+**
+**     Reference manual:    K22P121M120SF7RM, Rev. 1, March 24, 2014
+**     Version:             rev. 2.9, 2016-03-21
+**     Build:               b181105
+**
+**     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 2016 Freescale Semiconductor, Inc.
+**     Copyright 2016-2018 NXP
+**     All rights reserved.
+**
+**     SPDX-License-Identifier: BSD-3-Clause
+**
+**     http:                 www.nxp.com
+**     mail:                 [email protected]
+**
+**     Revisions:
+**     - rev. 1.0 (2013-07-23)
+**         Initial version.
+**     - rev. 1.1 (2013-09-17)
+**         RM rev. 0.4 update.
+**     - rev. 2.0 (2013-10-29)
+**         Register accessor macros added to the memory map.
+**         Symbols for Processor Expert memory map compatibility added to the memory map.
+**         Startup file for gcc has been updated according to CMSIS 3.2.
+**         System initialization updated.
+**     - rev. 2.1 (2013-10-30)
+**         Definition of BITBAND macros updated to support peripherals with 32-bit acces disabled.
+**     - rev. 2.2 (2013-12-20)
+**         Update according to reference manual rev. 0.6,
+**     - rev. 2.3 (2014-01-13)
+**         Update according to reference manual rev. 0.61,
+**     - rev. 2.4 (2014-02-10)
+**         The declaration of clock configurations has been moved to separate header file system_MK22F51212.h
+**     - rev. 2.5 (2014-05-06)
+**         Update according to reference manual rev. 1.0,
+**         Update of system and startup files.
+**         Module access macro module_BASES replaced by module_BASE_PTRS.
+**     - rev. 2.6 (2014-08-28)
+**         Update of system files - default clock configuration changed.
+**         Update of startup files - possibility to override DefaultISR added.
+**     - rev. 2.7 (2014-10-14)
+**         Interrupt INT_LPTimer renamed to INT_LPTMR0, interrupt INT_Watchdog renamed to INT_WDOG_EWM.
+**     - rev. 2.8 (2015-02-19)
+**         Renamed interrupt vector LLW to LLWU.
+**     - rev. 2.9 (2016-03-21)
+**         Added MK22FN512VFX12 part.
+**         GPIO - renamed port instances: PTx -> GPIOx.
+**
+** ###################################################################
+*/
+
+/*!
+ * @file MK22F51212
+ * @version 2.9
+ * @date 2016-03-21
+ * @brief Device specific configuration file for MK22F51212 (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_MK22F51212_H_
+#define _SYSTEM_MK22F51212_H_                    /**< Symbol preventing repeated inclusion */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+
+#ifndef DISABLE_WDOG
+  #define DISABLE_WDOG                 1
+#endif
+
+/* Define clock source values */
+
+#define CPU_XTAL_CLK_HZ                8000000u            /* Value of the external crystal or oscillator clock frequency in Hz */
+#define CPU_XTAL32k_CLK_HZ             32768u              /* Value of the external 32k crystal or oscillator clock frequency in Hz */
+#define CPU_INT_SLOW_CLK_HZ            32768u              /* Value of the slow internal oscillator clock frequency in Hz  */
+#define CPU_INT_FAST_CLK_HZ            4000000u            /* Value of the fast internal oscillator clock frequency in Hz  */
+#define CPU_INT_IRC_CLK_HZ             48000000u           /* Value of the 48M internal oscillator clock frequency in Hz  */
+
+/* RTC oscillator setting */
+/* RTC_CR: SC2P=0,SC4P=0,SC8P=0,SC16P=0,CLKO=1,OSCE=1,WPS=0,UM=0,SUP=0,WPE=0,SWR=0 */
+#define SYSTEM_RTC_CR_VALUE            0x0300U             /* RTC_CR */
+
+/* Low power mode enable */
+/* SMC_PMPROT: AHSRUN=1,AVLP=1,ALLS=1,AVLLS=1 */
+#define SYSTEM_SMC_PMPROT_VALUE        0xAAU               /* SMC_PMPROT */
+
+#define DEFAULT_SYSTEM_CLOCK           20971520u           /* Default System clock value */
+
+
+/**
+ * @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);
+
+/**
+ * @brief SystemInit function hook.
+ *
+ * This weak function allows to call specific initialization code during the
+ * SystemInit() execution.This can be used when an application specific code needs
+ * to be called as close to the reset entry as possible (for example the Multicore
+ * Manager MCMGR_EarlyInit() function call).
+ * NOTE: No global r/w variables can be used in this hook function because the
+ * initialization of these variables happens after this function.
+ */
+void SystemInitHook (void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* _SYSTEM_MK22F51212_H_ */