Microcomputer and its access speed control method

An access speed control method of a microcomputer, comprising:

• measuring a dose of radiation which the microcomputer receives;
• pre-establishing data indicative of a relationship between the dose of radiation and an access speed;
• and
• varying the access speed on the basis of the measured does of radiation and the pre-established data.

A microcomputer, comprising:

• a radiation measuring unit which measures a dose of radiation which the microcomputer receives;
• a storage unit which stores preset data indicative of a relationship between the dose of radiation and an access speed;
• a main arithmetic unit which controls the access speed on the basis of the measured dose of radiation and the preset data;
• and
• a peripheral control unit, wherein
• the main arithmetic unit, the peripheral control unit, and the storage unit are integrated on a single chip.

An access speed control method of a microcomputer, comprising:

• measuring a dose of radiation which the microcomputer receives;
• pre-establishing data indicative of a relationship between the dose of radiation and an access speed;
• controlling the access speed on the basis of the measured dose of radiation and the pre-established data;
• and
• integrating the main arithmetic unit, a peripheral control unit, and the storage unit on a single chip.

A microcomputer, comprising:

• a radiation measuring unit which measures a dose of radiation which the microcomputer receives;
• a storage unit which stores preset data indicative of a relationship between the dose of radiation and an access speed;
• and
• a main arithmetic unit which controls the access speed on the basis of the measured dose of radiation and the preset data,
• wherein said preset data are set such that the access speed is reduced as the dose of radiation increases.

An access speed control method of a microcomputer, comprising:

• measuring a dose of radiation which the microcomputer receives;
• pre-establishing data indicative of a relationship between the dose of radiation and an access speed;
• and
• controlling the access speed on the basis of the measured dose of radiation and the pre-established data,
• wherein said data are pre-established such that the access speed is reduced as the dose of radiation increases.

A robot used in a radiation-exposed environment, comprising:

• a microcomputer disposed in the radiation-exposed environment, said microcomputer having,
• a radiation measuring unit which measures a dose of radiation which said microcomputer receives,
• a storage unit which stores preset data indicative of a relationship between the dose of radiation and an access speed, and
• a main arithmetic unit which varies the access speed based on the measured dose of radiation and the preset data;
• and
• a working instrument disposed in the radiation-exposed environment and controlled by said microcomputer.