Request processing device for changing system mode

The utility model relates to a request processing device for changing the mode of a system, which comprises a signal holding/clearing unit and a gate control unit. The signal holding/clearing unit has a first input, a second input and an output, wherein the first input is used for receiving a request signal, the second input is used for receiving a control signal, the output is used for holding the request signal, and the signal holding/clearing unit clears the held request signal when the control signal acts. The gate control unit has a first input, a second input, a third input and an output, wherein the first input is used for connecting the first input of the signal holding /clearing unit, the second input is used for connecting the output of the signal holding /clearing unit, and the third input is used for connecting the second input of the signal holding/clearing unit. In the gate control unit, the gate control unit transfers the request signal when the control signal acts; otherwise, the request signal is blocked.