Semiconductor integrated circuit device

Details Semiconductor integrated circuit device Semiconductor integrated circuit device

1995-08-30

1997-01-07

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Testing

36518912, 365239, 365240, 365233, G11C 700

Patent

active

055924247

ABSTRACT:
A semiconductor integrated circuit device easily finds whether an error is located in an X decoder or a Y decoder. Circuit generating full cyclic sequences (36) and (38) are disposed which correspond to an X decoder (32) and a Y decoder (33), respectively, of a memory circuit (21). A specific state detection circuit (37) detects a specific address state of the circuit generating full cyclic sequence (36) so that one of an X address and a Y address is changed only after the other one of the X address and the Y address is thoroughly changed. Since when the error was created is known, which one of the X decoder and the Y decoder is responsible for the error is easily found.

REFERENCES:
patent: 4677590 (1987-06-01), Bisotto et al.
patent: 4899307 (1990-02-01), Lenoski
patent: 4959813 (1990-09-01), Todoroki
International Test Conference 1992, Paper 31.1, pp. 598-607, 1992, M. Nicolaidis, "Transparent Bist For Rams".

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