1# System Configuration Files system_<Device>.c and system_<Device>.h {#system_c_pg}
2
3CMSIS-Core system configuration files provide as a minimum the functions for system initialization and clock configuration as described under \ref system_init_gr. The file names use naming convention `system_<Device>.h` and `system_<Device>.c`, where `<Device>` corresponds to the device name.
4
5`system_<Device>.h` file shall contain the prototypes for accessing the public functions and `system_<Device>.c` shall contain corresponding implementations.
6
7The system configuration functions are device specific and need adaptation for the target device. The silicon vendor might expose other functions and configuration parameters such as XTAL, power configuration, etc.
8
9Additional application-specific adaptations may be required in the initialization code and therefore the system configuration file shall be located in the application project. \ref cmsis_files_dfps explains how this can be achieved when device support is provided in [CMSIS pack format](https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/index.html).
10
11# system_Device Template Files {#system_Device_sec}
12
13CMSIS-Core \ref cmsis_template_files include `system_Device.c` and `system_Device.h` files that can be used as a starting point for implementing device-specific system configuration files.
14