JPS6419454A - Programmable lsi - Google Patents
Programmable lsiInfo
- Publication number
- JPS6419454A JPS6419454A JP17673987A JP17673987A JPS6419454A JP S6419454 A JPS6419454 A JP S6419454A JP 17673987 A JP17673987 A JP 17673987A JP 17673987 A JP17673987 A JP 17673987A JP S6419454 A JPS6419454 A JP S6419454A
- Authority
- JP
- Japan
- Prior art keywords
- lsi
- data
- operation mode
- mode setting
- programmable lsi
- 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 improve the general usefulness and the reliability of a pro grammable LSI by providing the LSI itself with a function which cyclically reads out its operation mode setting data from an external memory to set this data to an internal operation mode setting register. CONSTITUTION:When a programming mode designating signal AUTO applied to the input terminal of a programmable LSI 1 is set to the automatic programming mode side, the counted value of a counter ACT which performs the counting operation by a signal ACK generated by a timing control circuit WCTL is successively sent to the external through an address bus AB. Consequently, since a memory 2 in which operation mode setting data is stored is provided on the outside of the programmable LSI 1 and is connected to the bus of the programmable LSI 1, contents in each address of the memory 2 are read out to the data bus DB and this read data is set to respective operation mode setting registers REG0-REGn. Thus, the general usefulness and the reliability of the programmable LSI 1 are improved independently of external circuits of a microprocessor, or the like.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17673987A JPS6419454A (en) | 1987-07-15 | 1987-07-15 | Programmable lsi |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17673987A JPS6419454A (en) | 1987-07-15 | 1987-07-15 | Programmable lsi |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6419454A true JPS6419454A (en) | 1989-01-23 |
Family
ID=16018951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17673987A Pending JPS6419454A (en) | 1987-07-15 | 1987-07-15 | Programmable lsi |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6419454A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5222682A (en) * | 1990-11-21 | 1993-06-29 | Takata Corporation | Belt pretensioner for a vehicle seat belt retractor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60252933A (en) * | 1984-05-29 | 1985-12-13 | Nec Corp | Lsi initialization circuit |
-
1987
- 1987-07-15 JP JP17673987A patent/JPS6419454A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60252933A (en) * | 1984-05-29 | 1985-12-13 | Nec Corp | Lsi initialization circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5222682A (en) * | 1990-11-21 | 1993-06-29 | Takata Corporation | Belt pretensioner for a vehicle seat belt retractor |
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