JPS5588149A - Output unit for semiconductor integrated circuit - Google Patents
Output unit for semiconductor integrated circuitInfo
- Publication number
- JPS5588149A JPS5588149A JP16275178A JP16275178A JPS5588149A JP S5588149 A JPS5588149 A JP S5588149A JP 16275178 A JP16275178 A JP 16275178A JP 16275178 A JP16275178 A JP 16275178A JP S5588149 A JPS5588149 A JP S5588149A
- Authority
- JP
- Japan
- Prior art keywords
- logic
- circuit
- transferred
- integrated circuit
- output unit
- 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
- Logic Circuits (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE: To make a test by generating logic level [1] or [0] in a needed state and at a needed point in time from a buffer circuit driving an external connection circuit connected to LSI according to a control signal obtained by a control circuit.
CONSTITUTION: When testing clocks are inputted to controller 11, output circuits A and B generate logic [0] or [1]. When logic [0] or [1] is transferred to output circuit B, control signal D transferred from logic circuit 10 can control tri-state 14 to high impedance or low impedance. When logic [0] or [1] is transferred to output circuit A, information signal C transferred from logic circuit 1 makes it possible to obtain logic [0] or [1] from exclusive-OR circuit 12-1 corresponding to the input.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16275178A JPS5588149A (en) | 1978-12-27 | 1978-12-27 | Output unit for semiconductor integrated circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16275178A JPS5588149A (en) | 1978-12-27 | 1978-12-27 | Output unit for semiconductor integrated circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5588149A true JPS5588149A (en) | 1980-07-03 |
Family
ID=15760556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16275178A Pending JPS5588149A (en) | 1978-12-27 | 1978-12-27 | Output unit for semiconductor integrated circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5588149A (en) |
-
1978
- 1978-12-27 JP JP16275178A patent/JPS5588149A/en active Pending
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