JPS55110348A - Microprocessor - Google Patents

Microprocessor

Info

Publication number
JPS55110348A
JPS55110348A JP1617279A JP1617279A JPS55110348A JP S55110348 A JPS55110348 A JP S55110348A JP 1617279 A JP1617279 A JP 1617279A JP 1617279 A JP1617279 A JP 1617279A JP S55110348 A JPS55110348 A JP S55110348A
Authority
JP
Japan
Prior art keywords
program
instruction
self
found
code table
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1617279A
Other languages
Japanese (ja)
Inventor
Shiro Baba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1617279A priority Critical patent/JPS55110348A/en
Publication of JPS55110348A publication Critical patent/JPS55110348A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To prevent a program from getting out of control or deadlocking by self- recovering by forcibly changing a program execution address into a fixed address on detecting an input, which is not found on an instruction code table, arriving at an instruction decoding part.
CONSTITUTION: Instruction decoding part 2 is given a function of discriminating input data which is not found on an instruction code table and its detection output is inputted to reset circuit 8, which exercises control over instruction register 1, etc., to force a program to enter an interrupt routine. As a result, this microprocessor can self-recover from malfunction due to a noise to a normal program routine, so that high reliability can be realized.
COPYRIGHT: (C)1980,JPO&Japio
JP1617279A 1979-02-16 1979-02-16 Microprocessor Pending JPS55110348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1617279A JPS55110348A (en) 1979-02-16 1979-02-16 Microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1617279A JPS55110348A (en) 1979-02-16 1979-02-16 Microprocessor

Publications (1)

Publication Number Publication Date
JPS55110348A true JPS55110348A (en) 1980-08-25

Family

ID=11909081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1617279A Pending JPS55110348A (en) 1979-02-16 1979-02-16 Microprocessor

Country Status (1)

Country Link
JP (1) JPS55110348A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164347A (en) * 1981-03-31 1982-10-08 Fujitsu Ltd Undefined instruction detector for one chip microcomputer
JPS57207952A (en) * 1981-06-17 1982-12-20 Fujitsu Ltd Instruction controlling system
JPS59123950A (en) * 1982-12-29 1984-07-17 Matsushita Electric Ind Co Ltd Program controller
JPS6083149A (en) * 1983-10-13 1985-05-11 Nec Corp Computer
JPS60181937A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Checking circuit of instruction code
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS63155235A (en) * 1986-12-18 1988-06-28 Nec Corp Cpu protecting circuit
WO2002103519A1 (en) * 2001-06-14 2002-12-27 Fujitsu Limited Information processing method and information processing device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164347A (en) * 1981-03-31 1982-10-08 Fujitsu Ltd Undefined instruction detector for one chip microcomputer
JPS57207952A (en) * 1981-06-17 1982-12-20 Fujitsu Ltd Instruction controlling system
JPS59123950A (en) * 1982-12-29 1984-07-17 Matsushita Electric Ind Co Ltd Program controller
JPH0128968B2 (en) * 1982-12-29 1989-06-07 Matsushita Electric Ind Co Ltd
JPS6083149A (en) * 1983-10-13 1985-05-11 Nec Corp Computer
JPS60181937A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Checking circuit of instruction code
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS63155235A (en) * 1986-12-18 1988-06-28 Nec Corp Cpu protecting circuit
WO2002103519A1 (en) * 2001-06-14 2002-12-27 Fujitsu Limited Information processing method and information processing device
JPWO2002103519A1 (en) * 2001-06-14 2004-10-07 富士通株式会社 Information processing method and information processing apparatus
JP4518790B2 (en) * 2001-06-14 2010-08-04 富士通株式会社 Semiconductor device and control method thereof

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