JPS621260U - - Google Patents

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Publication number
JPS621260U
JPS621260U JP9238385U JP9238385U JPS621260U JP S621260 U JPS621260 U JP S621260U JP 9238385 U JP9238385 U JP 9238385U JP 9238385 U JP9238385 U JP 9238385U JP S621260 U JPS621260 U JP S621260U
Authority
JP
Japan
Prior art keywords
time
circuit
ram
cpu
control program
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
JP9238385U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP9238385U priority Critical patent/JPS621260U/ja
Publication of JPS621260U publication Critical patent/JPS621260U/ja
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例による制御プログ
ラム内容保護装置、第２図は従来の制御プログラ
ム装置である。 １…ＣＰｕ、２…ＲＯＭ、３…ＲＡＭ、４…被
制御装置、５…ＲＡＭ、６…カウンタ、７…スピ
ーオ、９…スイツチ、１０…制御回路。 FIG. 1 shows a control program content protection device according to an embodiment of this invention, and FIG. 2 shows a conventional control program device. DESCRIPTION OF SYMBOLS 1... CPU, 2... ROM, 3... RAM, 4... Controlled device, 5... RAM, 6... Counter, 7... Speedo, 9... Switch, 10... Control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＣＰＵを制御するデータを記憶するＲＡＭと、
一定時間経過の都度時間の経過を示す経時回路と
、この経時回路からの信号を受けて後リセツト信
号をうけた場合を除き一定時間経過後前記ＲＡＭ
の記憶データを消めつさせる制御回路と、前記リ
セツト信号を送り込む手段とを備えた制御プログ
ラム内容保護装置。 RAM that stores data that controls the CPU;
A time circuit that indicates the passage of time each time a certain period of time has elapsed;
A control program content protection device comprising: a control circuit for erasing stored data; and means for sending the reset signal.
JP9238385U 1985-06-19 1985-06-19 Pending JPS621260U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9238385U JPS621260U (en) 1985-06-19 1985-06-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9238385U JPS621260U (en) 1985-06-19 1985-06-19

Publications (1)

Publication Number Publication Date
JPS621260U true JPS621260U (en) 1987-01-07

Family

ID=30649130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9238385U Pending JPS621260U (en) 1985-06-19 1985-06-19

Country Status (1)

Country Link
JP (1) JPS621260U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0162391U (en) * 1987-10-12 1989-04-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0162391U (en) * 1987-10-12 1989-04-20
JPH027908Y2 (en) * 1987-10-12 1990-02-26

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