JPS641017A - Common clock signal supply circuit - Google Patents
Common clock signal supply circuitInfo
- Publication number
- JPS641017A JPS641017A JP62155425A JP15542587A JPS641017A JP S641017 A JPS641017 A JP S641017A JP 62155425 A JP62155425 A JP 62155425A JP 15542587 A JP15542587 A JP 15542587A JP S641017 A JPS641017 A JP S641017A
- Authority
- JP
- Japan
- Prior art keywords
- clock signal
- circuit
- common clock
- system bus
- common
- 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
Landscapes
- Debugging And Monitoring (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE: To detect break of a common clock signal on a system bus to prevent the occurrence of system down by providing a common clock signal break detecting circuit in electronic circuit parts connected to the system bus.
CONSTITUTION: A common clock signal C1 on a system bus 3 is inputted to a system bus interface 12, a common clock signal break detecting circuit 16, and a clock signal disaccord detecting circuit 17, and a local clock signal C2 from a clock signal generating circuit 15 is inputted to the circuit 17. A clock break detection signal S1 from the circuit 16, a disaccord detection signal S2 from the circuit 17, and the clock signal C2 from the circuit 15 are inputted to a clock transmission control circuit 18, and the output from this circuit 18 is connected to the common clock signal C1 on the bus 3 by wired OR. Thus, only one common clock signal is allowed to always exist on the system bus without using a private common clock signal supply circuit like a bus management circuit to improve the reliability of the circuit.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62155425A JPS641017A (en) | 1987-06-24 | 1987-06-24 | Common clock signal supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62155425A JPS641017A (en) | 1987-06-24 | 1987-06-24 | Common clock signal supply circuit |
Publications (3)
Publication Number | Publication Date |
---|---|
JPH011017A JPH011017A (en) | 1989-01-05 |
JPS641017A true JPS641017A (en) | 1989-01-05 |
JPH0520765B2 JPH0520765B2 (en) | 1993-03-22 |
Family
ID=15605727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62155425A Granted JPS641017A (en) | 1987-06-24 | 1987-06-24 | Common clock signal supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS641017A (en) |
-
1987
- 1987-06-24 JP JP62155425A patent/JPS641017A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0520765B2 (en) | 1993-03-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |