JPH0187454U - - Google Patents

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Publication number
JPH0187454U
JPH0187454U JP18306987U JP18306987U JPH0187454U JP H0187454 U JPH0187454 U JP H0187454U JP 18306987 U JP18306987 U JP 18306987U JP 18306987 U JP18306987 U JP 18306987U JP H0187454 U JPH0187454 U JP H0187454U
Authority
JP
Japan
Prior art keywords
data memory
command control
check code
control signal
memory check
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
JP18306987U
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 JP18306987U priority Critical patent/JPH0187454U/ja
Publication of JPH0187454U publication Critical patent/JPH0187454U/ja
Pending legal-status Critical Current

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Description

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

第1図は本考案の全体図であり、第2図は実施
例1の動作を説明するためのフローチヤートであ
り、第3図は実施例2の動作を説明するためのフ
ローチヤートである。 主な参照番号、1……命令制御回路、2……デ
ータメモリチエツクコード生成回路、3……デー
タメモリ、4……EEPROM、5……データメ
モリチエツクコードとEEPROM比較回路、6
……スタンバイ・モード設定命令制御信号、7…
…スタンバイ・モード解除命令制御信号。
FIG. 1 is an overall diagram of the present invention, FIG. 2 is a flowchart for explaining the operation of the first embodiment, and FIG. 3 is a flowchart for explaining the operation of the second embodiment. Main reference numbers: 1...Instruction control circuit, 2...Data memory check code generation circuit, 3...Data memory, 4...EEPROM, 5...Data memory check code and EEPROM comparison circuit, 6...
...Standby mode setting command control signal, 7...
...Standby mode release command control signal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 命令制御回路と、この命令制御回路からのスタ
ンバイ・モード設定命令制御信号とスタンバイ・
モード解除命令制御信号によりデータメモリの内
容を読んでデータメモリのチエツクコードを生成
するデータメモリチエツクコード生成回路と、ス
タンバイ・モード設定命令制御信号によりデータ
メモリチエツクコードを書き込むEEPROMと
、スタンバイ・モード解除命令制御信号によりデ
ータメモリチエツクコードとEEPROMの内容
を比較してデータメモリチエツクコードとEEP
ROMの内容が一致か不一致かの信号を出力する
データメモリチエツクコードとEEPROM比較
回路を有するシングルチツプマイクロコンピユー
タのデータメモリ保持検出装置。
A command control circuit, a standby mode setting command control signal from this command control circuit, and a standby mode setting command control signal from the command control circuit.
A data memory check code generation circuit that reads the contents of data memory and generates a data memory check code in response to a mode release command control signal, an EEPROM that writes a data memory check code in response to a standby mode setting command control signal, and a standby mode release circuit. The data memory check code is compared with the contents of the EEPROM by the command control signal, and the data memory check code and the EEPROM are compared.
A data memory holding and detecting device for a single-chip microcomputer having a data memory check code and an EEPROM comparison circuit that output a signal indicating whether the contents of the ROM match or do not match.
JP18306987U 1987-11-30 1987-11-30 Pending JPH0187454U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18306987U JPH0187454U (en) 1987-11-30 1987-11-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18306987U JPH0187454U (en) 1987-11-30 1987-11-30

Publications (1)

Publication Number Publication Date
JPH0187454U true JPH0187454U (en) 1989-06-09

Family

ID=31474502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18306987U Pending JPH0187454U (en) 1987-11-30 1987-11-30

Country Status (1)

Country Link
JP (1) JPH0187454U (en)

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