JPS5611528A - Switching control circuit of different period clock - Google Patents
Switching control circuit of different period clockInfo
- Publication number
- JPS5611528A JPS5611528A JP8770779A JP8770779A JPS5611528A JP S5611528 A JPS5611528 A JP S5611528A JP 8770779 A JP8770779 A JP 8770779A JP 8770779 A JP8770779 A JP 8770779A JP S5611528 A JPS5611528 A JP S5611528A
- Authority
- JP
- Japan
- Prior art keywords
- clock
- gate
- output
- switching
- control 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
PURPOSE: To perform the switching of clock period margin without the production of noise even during the operation of system, by operating and controlling the synchronizing circuit corresponding to the clock designated at the clock selection circuit.
CONSTITUTION: When the clock selection signal SEL is at "0" and FF101 is in the selective indication state of the clock CLK2, the confirming AND gate 104 is closed and FF105, 106 are in reset state and no clock CLK1 is output from the clock gate 102. On the other hand, the reset output of FF101 is fed to FF107, the clock gate 103 is open and the clock CLK2 is output from the output gate 109. When the content of FF101 is switched, the gate 109 outputting the clock before switching is OFF, allowing to synchronize corresponding to the clock CLK1 designated at FF101. Thus, the switching of the clock period margin can be made without producing noise even during the system operation.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8770779A JPS5611528A (en) | 1979-07-11 | 1979-07-11 | Switching control circuit of different period clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8770779A JPS5611528A (en) | 1979-07-11 | 1979-07-11 | Switching control circuit of different period clock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5611528A true JPS5611528A (en) | 1981-02-04 |
Family
ID=13922378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8770779A Pending JPS5611528A (en) | 1979-07-11 | 1979-07-11 | Switching control circuit of different period clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5611528A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595328A (en) * | 1982-07-01 | 1984-01-12 | Matsushita Electric Ind Co Ltd | Clock switching circuit |
| JPS6099034A (en) * | 1983-11-02 | 1985-06-01 | 東レ株式会社 | Production of slab yarn |
| JPS6228823A (en) * | 1985-07-31 | 1987-02-06 | Toshiba Corp | Signal switching circuit |
| JPS62192815A (en) * | 1986-02-20 | 1987-08-24 | Fujitsu Ltd | Clock switching circuit |
| JPH01150921A (en) * | 1987-12-08 | 1989-06-13 | Ricoh Co Ltd | Clk switching circuit |
| JPH04305719A (en) * | 1991-01-10 | 1992-10-28 | Nec Corp | Clock signal switching circuit |
| JPH05204634A (en) * | 1991-08-29 | 1993-08-13 | Internatl Business Mach Corp <Ibm> | Microprocessor circuit |
-
1979
- 1979-07-11 JP JP8770779A patent/JPS5611528A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595328A (en) * | 1982-07-01 | 1984-01-12 | Matsushita Electric Ind Co Ltd | Clock switching circuit |
| JPS6099034A (en) * | 1983-11-02 | 1985-06-01 | 東レ株式会社 | Production of slab yarn |
| JPH0154449B2 (en) * | 1983-11-02 | 1989-11-20 | Toray Industries | |
| JPS6228823A (en) * | 1985-07-31 | 1987-02-06 | Toshiba Corp | Signal switching circuit |
| JPS62192815A (en) * | 1986-02-20 | 1987-08-24 | Fujitsu Ltd | Clock switching circuit |
| JPH0523441B2 (en) * | 1986-02-20 | 1993-04-02 | Fujitsu Ltd | |
| JPH01150921A (en) * | 1987-12-08 | 1989-06-13 | Ricoh Co Ltd | Clk switching circuit |
| JPH04305719A (en) * | 1991-01-10 | 1992-10-28 | Nec Corp | Clock signal switching circuit |
| JPH05204634A (en) * | 1991-08-29 | 1993-08-13 | Internatl Business Mach Corp <Ibm> | Microprocessor circuit |
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