JPH0184151U - - Google Patents
Info
- Publication number
- JPH0184151U JPH0184151U JP1987177421U JP17742187U JPH0184151U JP H0184151 U JPH0184151 U JP H0184151U JP 1987177421 U JP1987177421 U JP 1987177421U JP 17742187 U JP17742187 U JP 17742187U JP H0184151 U JPH0184151 U JP H0184151U
- Authority
- JP
- Japan
- Prior art keywords
- program
- uveprom
- prohibition
- erasing
- writing
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Storage Device Security (AREA)
Description
第１図は本考案の実施例１のブロツク図、第２
図は実施例２のブロツク図である。
１……ＵＶＥＰＲＯＭ、２……入出力バツフア
、３……バス、４……プログラムカウンタ、５…
…読み出しプロテクトビツト。
Figure 1 is a block diagram of the first embodiment of the present invention, and Figure 2 is a block diagram of the first embodiment of the present invention.
The figure is a block diagram of the second embodiment. 1...UVEPROM, 2...I/O buffer, 3...Bus, 4...Program counter, 5...
...Read protection bit.
Claims (1)
て、プログラムの書き込み時に、プログラムの読
み出しの許可または禁止の選択が行え、紫外線消
去によりＵＶＥＰＲＯＭへの書き込みが可能であ
ることを特徴とするプログラム読み出しプロテク
ト付ＵＶＥＰＲＯＭ内蔵型ワンチツプマイクロコ
ンピユータ。 A one-chip microcomputer with a built-in UVEPROM with program readout protection, which is characterized in that when writing a program, it is possible to select permission or prohibition of reading the program, and it is possible to write to the UVEPROM by erasing it with ultraviolet light. computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177421U JPH0184151U (en) | 1987-11-19 | 1987-11-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987177421U JPH0184151U (en) | 1987-11-19 | 1987-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0184151U true JPH0184151U (en) | 1989-06-05 |
Family
ID=31469085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987177421U Pending JPH0184151U (en) | 1987-11-19 | 1987-11-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0184151U (en) |
-
1987
- 1987-11-19 JP JP1987177421U patent/JPH0184151U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69630624D1 (en) | EEPROM matrix with a core similar to "flash" memory | |
| DE3580962D1 (en) | NON-VOLATILE DYNAMIC WRITING / READING MEMORY WITH OPTIONAL ACCESS. | |
| EP0209749A3 (en) | Memory system and interface therein | |
| JPH0412162U (en) | ||
| JPH01151341U (en) | ||
| JPS6137540U (en) | Memory with memory protection function | |
| JPS6348201U (en) | ||
| JPS61103745U (en) | ||
| JPH0321140U (en) | ||
| JPS6316336U (en) | ||
| JPH0289700U (en) | ||
| JPH01123205U (en) | ||
| JPS61136396U (en) | ||
| JPH0466659U (en) | ||
| JPH0214149U (en) | ||
| JPH01116691U (en) | ||
| JPS61189304U (en) | ||
| JPS63151051U (en) | ||
| JPS6452199U (en) | ||
| JPS61105985U (en) | ||
| JPS62153665U (en) | ||
| JPS62198600U (en) | ||
| JPS63103152U (en) | ||
| JPH01115747U (en) | ||
| JPH0250757U (en) |