The part I'm using is the KL27Z256LK4.
Where are the header files I asked about?
Are you saying the MKL27Z644 headers have replaced the MKL27Z4 headers?
This is what MKL27Z4.h files says at the top:
Pre CMSIS:
** ###################################################################
** Processors: MKL27Z256VFM4
** MKL27Z128VFM4
**
** Compilers: ARM Compiler
** Freescale C/C++ for Embedded ARM
** GNU C Compiler
** IAR ANSI C/C++ Compiler for ARM
**
** Reference manual: KL27PxxM48SF4RM, Rev.1, May 2014
** Version: rev. 1.1, 2014-05-26
** Build: b140528
Newer CMSIS version (which requires the missing headers that I asked about. Find it frustrating we are wasting time rather than just answering the question that was asked. Where is MKL27Z4_registers.h?).
** Processors: MKL27Z256VFM4
** MKL27Z128VFM4
** MKL27Z256VFT4
** MKL27Z128VFT4
** MKL27Z256VLH4
** MKL27Z128VLH4
** MKL27Z256VMP4
** MKL27Z128VMP4
**
** Compilers: Keil ARM C/C++ Compiler
** Freescale C/C++ for Embedded ARM
** GNU C Compiler
** GNU C Compiler - CodeSourcery Sourcery G++
** IAR ANSI C/C++ Compiler for ARM
**
** Reference manual: KL27P64M48SF6RM, Rev.3, Aug 2014
** Version: rev. 1.6, 2015-02-12
** Build: b150212