JPS55127635A - Interruption input interface - Google Patents
Interruption input interfaceInfo
- Publication number
- JPS55127635A JPS55127635A JP3407279A JP3407279A JPS55127635A JP S55127635 A JPS55127635 A JP S55127635A JP 3407279 A JP3407279 A JP 3407279A JP 3407279 A JP3407279 A JP 3407279A JP S55127635 A JPS55127635 A JP S55127635A
- Authority
- JP
- Japan
- Prior art keywords
- input
- cpu
- signal
- interruption
- rise
- 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
Abstract
PURPOSE: To set freely the response time of an interruption input by enriching the data processing contents of CPU by sending an interruption request signal to CPU by reading information, showing the rise or fall state of an input signal, from a memory through a latch circuit.
CONSTITUTION: In an interruption input interface coupling input multiplexer 4 with the bus line of CPU, time control signal generating circuit 1 generates a time control signal repeated at fixed cycles and input multiplexer 4 selects one input signal according to this signal. Here, detection part 5 compares two states of this signal on the same input line before and after one point in time to detect whether this input line is in a rise or fall state. On the detection, latch circuit 9 reads information on the rise or fall state from memory 6 or 7 to send an interruption request signal to CPU. Consequently, the data processing contents of CPU can be enriched and the response time of an interruption input can also be set freely.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3407279A JPS55127635A (en) | 1979-03-22 | 1979-03-22 | Interruption input interface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3407279A JPS55127635A (en) | 1979-03-22 | 1979-03-22 | Interruption input interface |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55127635A true JPS55127635A (en) | 1980-10-02 |
JPS6144355B2 JPS6144355B2 (en) | 1986-10-02 |
Family
ID=12404052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3407279A Granted JPS55127635A (en) | 1979-03-22 | 1979-03-22 | Interruption input interface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55127635A (en) |
-
1979
- 1979-03-22 JP JP3407279A patent/JPS55127635A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6144355B2 (en) | 1986-10-02 |
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