JPS5717063A - Test circuit of microcomputer - Google Patents

Test circuit of microcomputer

Info

Publication number
JPS5717063A
JPS5717063A JP9242280A JP9242280A JPS5717063A JP S5717063 A JPS5717063 A JP S5717063A JP 9242280 A JP9242280 A JP 9242280A JP 9242280 A JP9242280 A JP 9242280A JP S5717063 A JPS5717063 A JP S5717063A
Authority
JP
Japan
Prior art keywords
test
input
address
program memory
contents
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.)
Granted
Application number
JP9242280A
Other languages
Japanese (ja)
Other versions
JPS6116094B2 (en
Inventor
Koichi Fujita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9242280A priority Critical patent/JPS5717063A/en
Publication of JPS5717063A publication Critical patent/JPS5717063A/en
Publication of JPS6116094B2 publication Critical patent/JPS6116094B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/36—Preventing errors by testing or debugging software
    • G06F11/3668—Software testing
    • G06F11/3672—Test management
    • G06F11/3688—Test management for test execution, e.g. scheduling of test suites

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE:To carry out a test to decide whether a program is correct or not, by securing a test for the contents of a program memory without reading it to outside and making it difficult for a third person to know the contents of the program memory. CONSTITUTION:When a switching is given to a test mode by a test input signal 8, an external address signal 8 is turned into an address input by an address input multiplexer 5a for the address input to be applied to a program memory 2. The memory data corresponding to the address input is fed to a dissidence detecting circuit 12 through a memory data output multiplexer 5b. While a comparison data input signal 14 is fed to an input of the circuit 12 from a comparison data input circuit 11 to be compared with the output of the multiplexer 5a. Then a dissidence holding FF13 is set if no coincidence is obtained. Thus the address and the comparison data are changed successively after clearing the FF13. After this, the contents of the FF13 is checked to give a test for the correctness of a program memory.
JP9242280A 1980-07-04 1980-07-04 Test circuit of microcomputer Granted JPS5717063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9242280A JPS5717063A (en) 1980-07-04 1980-07-04 Test circuit of microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9242280A JPS5717063A (en) 1980-07-04 1980-07-04 Test circuit of microcomputer

Publications (2)

Publication Number Publication Date
JPS5717063A true JPS5717063A (en) 1982-01-28
JPS6116094B2 JPS6116094B2 (en) 1986-04-28

Family

ID=14053977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9242280A Granted JPS5717063A (en) 1980-07-04 1980-07-04 Test circuit of microcomputer

Country Status (1)

Country Link
JP (1) JPS5717063A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415835A (en) * 1987-07-10 1989-01-19 Nec Corp Microcomputer
JPH01118933A (en) * 1987-10-31 1989-05-11 Nec Corp Single-chip microcomputer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6415835A (en) * 1987-07-10 1989-01-19 Nec Corp Microcomputer
JPH01118933A (en) * 1987-10-31 1989-05-11 Nec Corp Single-chip microcomputer

Also Published As

Publication number Publication date
JPS6116094B2 (en) 1986-04-28

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