File content as of revision 172:65be27845400:

/*
** ###################################################################
**     Processors:          MKL27Z32VDA4
**                          MKL27Z32VFM4
**                          MKL27Z32VFT4
**                          MKL27Z32VLH4
**                          MKL27Z32VMP4
**                          MKL27Z64VDA4
**                          MKL27Z64VFM4
**                          MKL27Z64VFT4
**                          MKL27Z64VLH4
**                          MKL27Z64VMP4
**
**     Compilers:           Keil ARM C/C++ Compiler
**                          Freescale C/C++ for Embedded ARM
**                          GNU C Compiler
**                          IAR ANSI C/C++ Compiler for ARM
**
**     Reference manual:    KL27P64M48SF2RM, Rev. 1, Sep 2014
**     Version:             rev. 1.4, 2014-09-22
**     Build:               b151217
**
**     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 (c) 2015 Freescale Semiconductor, Inc.
**     All rights reserved.
**
**     Redistribution and use in source and binary forms, with or without modification,
**     are permitted provided that the following conditions are met:
**
**     o Redistributions of source code must retain the above copyright notice, this list
**       of conditions and the following disclaimer.
**
**     o Redistributions in binary form must reproduce the above copyright notice, this
**       list of conditions and the following disclaimer in the documentation and/or
**       other materials provided with the distribution.
**
**     o Neither the name of Freescale Semiconductor, Inc. nor the names of its
**       contributors may be used to endorse or promote products derived from this
**       software without specific prior written permission.
**
**     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
**     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
**     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
**     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
**     ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
**     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
**     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
**     ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
**     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
**     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
**     http:                 www.freescale.com
**     mail:                 support@freescale.com
**
**     Revisions:
**     - rev. 1.0 (2014-05-12)
**         Initial version.
**     - rev. 1.1 (2014-07-10)
**         UART0 - UART0 module renamed to UART2.
**     - rev. 1.2 (2014-08-12)
**         CRC - CRC register renamed to DATA.
**     - rev. 1.3 (2014-09-02)
**         USB - USB0_CTL0 was renamed to USB0_OTGCTL register.
**         USB - USB0_CTL1 was renamed to USB0_CTL register.
**         USB - Two new bitfields (STOP_ACK_DLY_EN, AHB_DLY_EN) was added to the USB0_KEEP_ALIVE_CTRL register.
**     - rev. 1.4 (2014-09-22)
**         FLEXIO - Offsets of the SHIFTBUFBIS registers were interchanged with offsets of the SHIFTBUFBBS registers.
**         SIM - Changed bitfield value MCGIRCLK to LIRC_CLK of bitfield CLKOUTSEL in SOPT2 register.
**         SIM - Removed bitfield DIEID in SDID register.
**         UART2 - Removed ED register.
**         UART2 - Removed MODEM register.
**         UART2 - Removed IR register.
**         UART2 - Removed PFIFO register.
**         UART2 - Removed CFIFO register.
**         UART2 - Removed SFIFO register.
**         UART2 - Removed TWFIFO register.
**         UART2 - Removed TCFIFO register.
**         UART2 - Removed RWFIFO register.
**         UART2 - Removed RCFIFO register.
**         USB - Removed bitfield REG_EN in CLK_RECOVER_IRC_EN register.
**         USB - Renamed USBEN bitfield of USB0_CTL was renamed to USBENSOFEN.
**
** ###################################################################
*/

/*!
 * @file MKL27Z644
 * @version 1.4
 * @date 2014-09-22
 * @brief Device specific configuration file for MKL27Z644 (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_MKL27Z644_H_
#define _SYSTEM_MKL27Z644_H_                     /**< Symbol preventing repeated inclusion */

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>


#ifndef DISABLE_WDOG
  #define DISABLE_WDOG  1
#endif

#ifndef ACK_ISOLATION
  #define ACK_ISOLATION   1
#endif

/* Define clock source values */

#define CPU_XTAL_CLK_HZ                32768u              /* Value of the external crystal or oscillator clock frequency in Hz */
#define CPU_INT_FAST_CLK_HZ            48000000u           /* 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  */

/* Low power mode enable */
/* SMC_PMPROT: AVLP=1,AVLLS=1 */
#define SYSTEM_SMC_PMPROT_VALUE        0x2Au               /* SMC_PMPROT */

#define DEFAULT_SYSTEM_CLOCK           8000000u            /* Default System clock value */
#define CPU_INT_SLOW_CLK_HZ            8000000u            /* Value of the slow internal oscillator clock frequency in Hz  */


/**
 * @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  /* _SYSTEM_MKL27Z644_H_ */