The utility model discloses a main
control unit of railway mobile communication equipment, which comprises a processor, a writing maintenance interface, a power supply module, an external memory and an FPGA (
field programmable gate array) module, the processor is arranged as the core of the main
control unit, the FPGA module is used for
functional programming of the main
control unit, the FPGA module is matched with an RAM (
random access memory)
chip by adding
serial port expansion, and the external memory is connected with the FPGA module. And the RAM
chip is used for data interaction communication between the main control unit and each controlled unit. The main control unit and the
data interface isolation
chip of the railway mobile communication equipment protect the input / output interface and the hot plug, and the external memory performs basic
information management of each functional unit, so that the
overall efficiency of the main control unit is improved, the watchdog circuit avoids interference from an external
electromagnetic field, and normal and smooth operation of a program is ensured.