JPS5953440U - Microcomputer mode change circuit - Google Patents
Microcomputer mode change circuitInfo
- Publication number
- JPS5953440U JPS5953440U JP14839782U JP14839782U JPS5953440U JP S5953440 U JPS5953440 U JP S5953440U JP 14839782 U JP14839782 U JP 14839782U JP 14839782 U JP14839782 U JP 14839782U JP S5953440 U JPS5953440 U JP S5953440U
- Authority
- JP
- Japan
- Prior art keywords
- mode
- microcomputer
- circuit
- mode change
- change circuit
- 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
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案によるマイクロコンピュータのモード変
更回路の一実施例を示す回路図、第２図ａ ”−ｄは第
１図に示す回路の各部動作波形を示す図、第３図は本考
案による他の実施例を示す回路図、第４図ａ、 ｂは
第３図に示す回路の各部動作波形である。
１・・・マイクロコンピュータ、２・・・抵抗、３・・
・コンデンサ、４・・・インバータ、５・・・アンドゲ
ート、６・・・発振回路。Fig. 1 is a circuit diagram showing an embodiment of the mode change circuit of a microcomputer according to the present invention, Fig. 2 a''-d are diagrams showing operation waveforms of each part of the circuit shown in Fig. Figures 4a and 4b are operational waveforms of each part of the circuit shown in Figure 3.1...Microcomputer, 2...Resistor, 3...
・Capacitor, 4... Inverter, 5... AND gate, 6... Oscillation circuit.
Claims (1)
から積分動作を開始するモード指定用の積分回路と、前
記リセット信号の解除時点から前記積分回路の出力が設
定値に達するまでの期間に於いて発生されるモード指定
信号を前記マイクロコンピュータのモード判別ポ゛−ト
に供給するゲート回路とを備え、前記マイクロコンピュ
ータはモード判別ポートに供給されるモード指定信号の
パルス幅またはパルス数によって指定されるモード−を
判別しそモード設定を行なうことを特徴とするマイクロ
コンピュータのモード変更回路。An integrating circuit for specifying a mode that starts an integral operation from the time when a reset signal to the microcomputer is released, and a mode specifying circuit that is generated during a period from the time when the reset signal is released until the output of the integrating circuit reaches a set value. and a gate circuit that supplies a signal to a mode discrimination port of the microcomputer, and the microcomputer discriminates the mode specified by the pulse width or number of pulses of the mode specification signal supplied to the mode discrimination port. A mode change circuit for a microcomputer characterized by setting a mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14839782U JPS5953440U (en) | 1982-09-30 | 1982-09-30 | Microcomputer mode change circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14839782U JPS5953440U (en) | 1982-09-30 | 1982-09-30 | Microcomputer mode change circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5953440U true JPS5953440U (en) | 1984-04-07 |
Family
ID=30329716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14839782U Pending JPS5953440U (en) | 1982-09-30 | 1982-09-30 | Microcomputer mode change circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953440U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537691A (en) * | 1978-09-05 | 1980-03-15 | Motorola Inc | Programmable mode selector via reset |
-
1982
- 1982-09-30 JP JP14839782U patent/JPS5953440U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537691A (en) * | 1978-09-05 | 1980-03-15 | Motorola Inc | Programmable mode selector via reset |
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