JPS5723126A - Resetting control system of one-chip microcomputer - Google Patents
Resetting control system of one-chip microcomputerInfo
- Publication number
- JPS5723126A JPS5723126A JP9618780A JP9618780A JPS5723126A JP S5723126 A JPS5723126 A JP S5723126A JP 9618780 A JP9618780 A JP 9618780A JP 9618780 A JP9618780 A JP 9618780A JP S5723126 A JPS5723126 A JP S5723126A
- Authority
- JP
- Japan
- Prior art keywords
- rst
- signal
- terminal
- outputted
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microcomputers (AREA)
Abstract
PURPOSE:To utilize a reset-signal input terminal effectively by outputting a reset signal from the input terminal. CONSTITUTION:When a power source is turned on, a rising power voltage VDD does not depend upon an RST signal (a) in a voltage unstable resin, and a CPU is set to an initial value through the operation of its internal voltage detecting circuit. When the RST signal (a) is outputted from an RST terminal 2 as a pulse having an active level, an RST output control signal (c) is outputted on the execution of an output instruction for the RST signal (a). A transistor (TR) 8 is normally off and the RST terminal 2 is therefore pulled up to a high level by a pull-up resistance 7. When a pulse with an active level (High) is outputted as the RST output control signal (c), the TR8 is turned on to output the pulse with an active level (LOW) from the RST terminal 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9618780A JPS5723126A (en) | 1980-07-16 | 1980-07-16 | Resetting control system of one-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9618780A JPS5723126A (en) | 1980-07-16 | 1980-07-16 | Resetting control system of one-chip microcomputer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5723126A true JPS5723126A (en) | 1982-02-06 |
Family
ID=14158302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9618780A Pending JPS5723126A (en) | 1980-07-16 | 1980-07-16 | Resetting control system of one-chip microcomputer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5723126A (en) |
-
1980
- 1980-07-16 JP JP9618780A patent/JPS5723126A/en active Pending
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