JPS647537A - Custom lsi - Google Patents
Custom lsiInfo
- Publication number
- JPS647537A JPS647537A JP16374787A JP16374787A JPS647537A JP S647537 A JPS647537 A JP S647537A JP 16374787 A JP16374787 A JP 16374787A JP 16374787 A JP16374787 A JP 16374787A JP S647537 A JPS647537 A JP S647537A
- Authority
- JP
- Japan
- Prior art keywords
- rom
- address
- data
- signal
- code name
- 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
Landscapes
- Semiconductor Integrated Circuits (AREA)
- Design And Manufacture Of Integrated Circuits (AREA)
Abstract
PURPOSE:To make it possible to confirm the kind of each functional block of on-chip after resin sealing by a method wherein a code name to correspond to each functional block constituting of a custom LSI is stored in a ROM and the data of the code name is read out outside. CONSTITUTION:An address signal is inputted in an internal address bus 5 from the exterior through an input port 1 in a state that a test signal (a) is active. The test signal is a test mode signal for reading out outside code names stored in a ROM 4 as data and a ROM address decoder 3 decodes addresses on the address bus and selects the address of the ROM 4. The ROM 4 outputs outside the code name stored in the selected address as data through an internal data bus 6 and an output port 2. That is, when the test signal is active, ROM data to correspond to the address signal inputted from the exterior is outputted. Thereby, an on-chip mega cell can be confirmed, even in a product subsequent to resin sealing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16374787A JPS647537A (en) | 1987-06-29 | 1987-06-29 | Custom lsi |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16374787A JPS647537A (en) | 1987-06-29 | 1987-06-29 | Custom lsi |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647537A true JPS647537A (en) | 1989-01-11 |
Family
ID=15779920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16374787A Pending JPS647537A (en) | 1987-06-29 | 1987-06-29 | Custom lsi |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647537A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04303961A (en) * | 1991-04-01 | 1992-10-27 | Nec Ic Microcomput Syst Ltd | Semiconductor integrated circuit |
-
1987
- 1987-06-29 JP JP16374787A patent/JPS647537A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04303961A (en) * | 1991-04-01 | 1992-10-27 | Nec Ic Microcomput Syst Ltd | Semiconductor integrated circuit |
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