Semiconductor device, semiconductor system and program

A semiconductor system comprising:

• a plurality of semiconductor devices communicably coupled to each other, wherein the plurality of semiconductor devices each comprises:
• a main controller having, comprising:
• a main memory for storing a main program for receiving an external signal;
• and
• a trigger signal output circuit for outputting a trigger signal when a signal process different from a preset signal processing is performed;
• and
• a sub-controller coupled to the main controller, the sub-controller comprising:
• a trigger signal obtaining circuit for obtaining the trigger signal;
• a sub-program output circuit for outputting a sub-program to the main controller based on the obtained trigger signal;
• and
• a reset terminal for holding the sub-controller in a non-operating state,
• wherein the main controller includes a program update circuit for receiving an update of a program stored in the main memory when the sub-controller is in the non-operating state, and
• wherein one of the plurality of semiconductor devices transmits a notification based on the trigger signal to another semiconductor device.

A non-transitory computer readable medium storing a program that, when executed by a computer, causes the computer to perform a semiconductor device protecting method, the semiconductor device protecting method comprising:

• a main program storage step for storing a main program for accepting an external signal in a main control device;
• a sub program storing step for storing a sub program in a sub control device coupled to the main control device;
• a trigger signal outputting step for outputting a trigger signal to the sub control device when a signal process different from a preset signal processing is performed in the main control device;
• and
• a sub program outputting step for outputting the sub program to the main control device based on the trigger signal in the sub control device,
• wherein the semiconductor device protecting method further includes a reset step for holding the sub control device in a non-operating state, and
• wherein, when the sub control device is in the non-operating state, an update of a program stored in the main memory is received.