JPS643578A - Test circuit for semiconductor integrated circuit - Google Patents
Test circuit for semiconductor integrated circuitInfo
- Publication number
- JPS643578A JPS643578A JP62160590A JP16059087A JPS643578A JP S643578 A JPS643578 A JP S643578A JP 62160590 A JP62160590 A JP 62160590A JP 16059087 A JP16059087 A JP 16059087A JP S643578 A JPS643578 A JP S643578A
- Authority
- JP
- Japan
- Prior art keywords
- address
- circuit
- test
- rom
- generating circuit
- 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.)
- Granted
Links
Landscapes
- Tests Of Electronic Circuits (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Abstract
PURPOSE:To obtain a high effect with an inexpensive equipment by providing an address generating circuit which generates the address of a mu-ROM and a final address generating circuit which detects the final address of the above- mentioned address and generates a reset signal. CONSTITUTION:A test mode detecting circuit 17 detects a test input signal (a) and outputs a test signal (b) when said input signal is inputted thereto. The final address detecting circuit 14, an address incrementing circuit 13 and an external output prohibiting circuit 16 are enabled by this test signal (b). However, an address modification control circuit 15 is disabled. The address supply to the mu-ROM 10 in an ordinary operation is determined by determining a mu-ROM address buss 11 by the circuit 15 and feeding the address from the circuit 13 to the address generating circuit 12. The addresses added with 1 by the address incrementing circuit 13 are thereafter outputted successively from the address generating circuit 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160590A JP2604378B2 (en) | 1987-06-26 | 1987-06-26 | Test circuit for semiconductor integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160590A JP2604378B2 (en) | 1987-06-26 | 1987-06-26 | Test circuit for semiconductor integrated circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS643578A true JPS643578A (en) | 1989-01-09 |
JP2604378B2 JP2604378B2 (en) | 1997-04-30 |
Family
ID=15718243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62160590A Expired - Lifetime JP2604378B2 (en) | 1987-06-26 | 1987-06-26 | Test circuit for semiconductor integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2604378B2 (en) |
-
1987
- 1987-06-26 JP JP62160590A patent/JP2604378B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2604378B2 (en) | 1997-04-30 |
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