JPS54137251A - Code conversion system - Google Patents
Code conversion systemInfo
- Publication number
- JPS54137251A JPS54137251A JP4507678A JP4507678A JPS54137251A JP S54137251 A JPS54137251 A JP S54137251A JP 4507678 A JP4507678 A JP 4507678A JP 4507678 A JP4507678 A JP 4507678A JP S54137251 A JPS54137251 A JP S54137251A
- Authority
- JP
- Japan
- Prior art keywords
- data
- control signal
- address bit
- code conversion
- roma
- 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 simplify the circuit constitution with a reduced number of the elements and then to enhance the reliability and the packing density by putting the control signal into the address bit of the highest-rank of ROM and then selecting the data output based on the state of the control signal.
CONSTITUTION: ROMA features the address bit of 2n+1; input data C1WCn are supplied to address bits A1WAn; and control signal S is introduced into high- rank address bit An+1 from CPU. Signal S features logic 1 or 0 mode, and output data E1WEn same as data C1WCn or data E1WEn obtained through code conversion of C1WCn are delivered from ROMA according to the mode of 1 or 0. Thus, the selector can be omitted to simplify the circuit constitution.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4507678A JPS54137251A (en) | 1978-04-17 | 1978-04-17 | Code conversion system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4507678A JPS54137251A (en) | 1978-04-17 | 1978-04-17 | Code conversion system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54137251A true JPS54137251A (en) | 1979-10-24 |
Family
ID=12709236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4507678A Pending JPS54137251A (en) | 1978-04-17 | 1978-04-17 | Code conversion system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54137251A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5798039A (en) * | 1980-12-12 | 1982-06-18 | Nec Corp | Decoding circuit |
JPS61134998A (en) * | 1984-12-04 | 1986-06-23 | Nec Corp | Read-only memory |
-
1978
- 1978-04-17 JP JP4507678A patent/JPS54137251A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5798039A (en) * | 1980-12-12 | 1982-06-18 | Nec Corp | Decoding circuit |
JPS61134998A (en) * | 1984-12-04 | 1986-06-23 | Nec Corp | Read-only memory |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS648717A (en) | Pseudo noise series code generating circuit | |
JPS54137251A (en) | Code conversion system | |
JPS54119847A (en) | Memory unit | |
JPS5557948A (en) | Digital adder | |
JPS5679352A (en) | Address generator | |
JPS5611506A (en) | Sequence controller | |
JPS5510647A (en) | Longitudinal and lateral conversion system for pattern | |
JPS52129345A (en) | Computation control system | |
JPS64811A (en) | Pseudo random binary sequence generator | |
JPS573471A (en) | Decoder | |
JPS5469044A (en) | Input/output control system for lsi | |
JPS563494A (en) | Defect remedying system for bubble memory | |
JPS54119831A (en) | Decoding circuit | |
JPS5480726A (en) | Coding and decoding device | |
JPS551675A (en) | Memory protect control system | |
JPS5384668A (en) | Parallel-processing-type signal conversion circuit | |
JPS56101614A (en) | Binary code converting method | |
JPS5636740A (en) | Signal selecting circuit | |
JPS54130111A (en) | Coding system | |
JPS57157165A (en) | Pattern generator | |
JPS5635213A (en) | Symbol converting system | |
JPS5587398A (en) | Semiconductor memory element | |
JPS5515583A (en) | Bit slice type arithmetic circuit | |
JPS5619144A (en) | Digital comparison circuit | |
JPS533042A (en) | Electronic computer |