JPS5687150A - Writer for read only memory - Google Patents
Writer for read only memoryInfo
- Publication number
- JPS5687150A JPS5687150A JP16502579A JP16502579A JPS5687150A JP S5687150 A JPS5687150 A JP S5687150A JP 16502579 A JP16502579 A JP 16502579A JP 16502579 A JP16502579 A JP 16502579A JP S5687150 A JPS5687150 A JP S5687150A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- data
- constitution
- write
- rom
- 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 write in the output data to an ROM with different bit constitution as the bit constitution of output data, by arbitrarily controlling the memory section and each signal selection section, according to the bit constitution of ROM describing the output data.
CONSTITUTION: The data of hexadecimal code input at the input reception converter 1 is converted into a binary code, the data in 8-bit converted is separated into the upper rank and lower rank 4-bit, the upper rank bit data is transmitted to the multiplexer 2 via the data line D2, and the lower rank bit is stored in the 1st memory device 3 via the data line D1. Further, the multiplexer 2 is controlled with the control signal C1 from the controller 7, and the upper rank bit data is stored in the 2nd memory device 4. The address in this case is determined with the address signal of the address line ADL, the selective instruction of the devices 3, 4 is made with the control signals C3, C4 from the device 7, and the write-in/readout to the devices 3, 4 are made with the control signal C2. Further, the output of the devices 3, 4 is written in the ROM write-in section 6 with the control of the device 7.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16502579A JPS5687150A (en) | 1979-12-19 | 1979-12-19 | Writer for read only memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16502579A JPS5687150A (en) | 1979-12-19 | 1979-12-19 | Writer for read only memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5687150A true JPS5687150A (en) | 1981-07-15 |
Family
ID=15804406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16502579A Pending JPS5687150A (en) | 1979-12-19 | 1979-12-19 | Writer for read only memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5687150A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5823392A (en) * | 1981-08-03 | 1983-02-12 | Hiroshi Osuji | Write system for rom writer |
JPS5916186A (en) * | 1982-07-20 | 1984-01-27 | Fujitsu Ltd | Storage device |
JPS5995498U (en) * | 1982-12-20 | 1984-06-28 | 日本電気株式会社 | Storage device |
JPS59131044U (en) * | 1983-02-23 | 1984-09-03 | 三菱重工業株式会社 | Sampling tube insertion device |
JPS6148195A (en) * | 1984-08-13 | 1986-03-08 | Hitachi Ltd | One chip microcomputer |
-
1979
- 1979-12-19 JP JP16502579A patent/JPS5687150A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5823392A (en) * | 1981-08-03 | 1983-02-12 | Hiroshi Osuji | Write system for rom writer |
JPS6059673B2 (en) * | 1981-08-03 | 1985-12-26 | 広 大條 | ROM writer writing method |
JPS5916186A (en) * | 1982-07-20 | 1984-01-27 | Fujitsu Ltd | Storage device |
JPS635833B2 (en) * | 1982-07-20 | 1988-02-05 | Fujitsu Ltd | |
JPS5995498U (en) * | 1982-12-20 | 1984-06-28 | 日本電気株式会社 | Storage device |
JPS59131044U (en) * | 1983-02-23 | 1984-09-03 | 三菱重工業株式会社 | Sampling tube insertion device |
JPS6148195A (en) * | 1984-08-13 | 1986-03-08 | Hitachi Ltd | One chip microcomputer |
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