Semiconductor device

A semiconductor device comprising:

• a semiconductor chip with a plurality of circuits formed,
• wherein the plurality of circuits include:
• a power-on controller that controls power supply to the semiconductor chip,
• a plurality of detection circuits that detect unauthorized access,
• a detection controller that controls the plurality of detection circuits,
• peripheral circuits, and
• a system controller that controls the peripheral circuits,
• wherein the plurality of detection circuits include:
• a first register that stores detection data for detecting unauthorized access,
• a second register that stores reference data, and
• a comparison circuit that compares the detection data with reference data,
• wherein the detection controller, after power is supplied to the semiconductor chip by the power-on controller, sequentially transfers the detection data in a loop to the plurality of detection circuits,
• wherein the comparison circuit compares the detection data stored in the first register with the reference data stored in the second register, and if the detection data and the reference data do not match, it sends error data indicating unauthorized access to the system controller, and
• wherein the system controller, upon receiving the error data, disconnects the connection with the peripheral circuits.