JPS62125957U - - Google Patents
Info
- Publication number
- JPS62125957U JPS62125957U JP1037886U JP1037886U JPS62125957U JP S62125957 U JPS62125957 U JP S62125957U JP 1037886 U JP1037886 U JP 1037886U JP 1037886 U JP1037886 U JP 1037886U JP S62125957 U JPS62125957 U JP S62125957U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputers
- program
- signal
- pulse signals
- pulse
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Debugging And Monitoring (AREA)
- Multi Processors (AREA)
Description
第１図はこの考案にかかるマイクロコンピユー
タの暴走検知システムのブロツク接続図、第２図
及び第３図はそのブロツク接続図各部の信号波形
図、第４図は従来の同様の暴走検知システムを示
すブロツク接続図である。
１１，１２……マイクロコンピユータ、１３…
…信号論理検出回路、１４……ＲＣ回路、１５…
…排他的論理和回路、１９……リセツトパルス発
生回路。
Figure 1 is a block connection diagram of the microcomputer runaway detection system according to this invention, Figures 2 and 3 are signal waveform diagrams of various parts of the block connection diagram, and Figure 4 shows a similar conventional runaway detection system. It is a block connection diagram. 11, 12... microcomputer, 13...
...Signal logic detection circuit, 14...RC circuit, 15...
...Exclusive OR circuit, 19...Reset pulse generation circuit.
Claims (1)
う２つのマイクロコンピユータ１１，１２を備え
、かつ、前記２つのマイクロコンピユータの一方
１１は、そのプログラムぎ正常に動作し得る状態
にあるときに、所定のパルス信号Ｓ１を所定の出
力ポート１１ａから出力するプログラムを有する
と共に、前記２つのマイクロコンピユータの他方
１２は、そのプログラムが正常に動作し得る状態
にあるときに、前記一方のマイクロコンピユータ
１１から供給される前記所定のパルス信号Ｓ１に
基づき該パルス信号Ｓ１に対して論理が反転関係
にあるパルス信号Ｓ２を所定の出力ポート１２ａ
から出力するプログラムを有し、更に、前記２つ
のマイクロコンピユータ１１，１２の各出力ポー
ト１１ａ，１２ａから出力される前記２つのパル
ス信号Ｓ１，Ｓ２を入力し、これらのパルス信号
Ｓ１，Ｓ２の論理が互いに反転関係を保つている
か否かを検出する信号論理検出回路１３を備え、
かつ、該信号論理検出回路１３は、前記２つのパ
ルス信号Ｓ１，Ｓ２の一方を直接入力すると共に
、前記２つのパルス信号Ｓ１，Ｓ２の一方を直接
入力すると共に、前記２つのパルス信号Ｓ１，Ｓ
２の他方をコンデンサ１４１を介して入力する排
他的論理和回路１５と、該排他的論理和回路１５
の２入力端子１５ａ，１５ｂ間に介挿された固定
抵抗器１４２からなることを特徴とするマイクロ
コンピユータの暴走検知システム。 It is equipped with two microcomputers 11 and 12 that perform predetermined system control according to a program, and one of the two microcomputers 11 receives a predetermined pulse signal when the program is in a state where it can operate normally. The other microcomputer 12 of the two microcomputers is supplied with the program from the one microcomputer 11 when the program is in a state where it can operate normally. Based on the predetermined pulse signal S1 , a pulse signal S2 whose logic is inverted with respect to the pulse signal S1 is sent to a predetermined output port 12a.
It has a program output from the microcomputers 11 and 12, and further inputs the two pulse signals S 1 and S 2 output from the respective output ports 11a and 12a of the two microcomputers 11 and 12, and outputs the pulse signals S 1 and comprising a signal logic detection circuit 13 for detecting whether or not the logics of S2 maintain an inverse relationship with each other;
Further, the signal logic detection circuit 13 directly inputs one of the two pulse signals S 1 and S 2 , directly inputs one of the two pulse signals S 1 and S 2 , and directly inputs one of the two pulse signals S 1 and S 2 . Signal S 1 , S
2 through the capacitor 141; and the exclusive OR circuit 15.
A microcomputer runaway detection system comprising a fixed resistor 142 inserted between two input terminals 15a and 15b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1037886U JPH0418044Y2 (en) | 1986-01-29 | 1986-01-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1037886U JPH0418044Y2 (en) | 1986-01-29 | 1986-01-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62125957U true JPS62125957U (en) | 1987-08-10 |
| JPH0418044Y2 JPH0418044Y2 (en) | 1992-04-22 |
Family
ID=30796610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1037886U Expired JPH0418044Y2 (en) | 1986-01-29 | 1986-01-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0418044Y2 (en) |
-
1986
- 1986-01-29 JP JP1037886U patent/JPH0418044Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0418044Y2 (en) | 1992-04-22 |