Structure for externally identifying an internal state of a semi

Details Structure for externally identifying an internal state of a semi Structure for externally identifying an internal state of a semi

1995-06-05

1997-07-01

Hudspeth, David R.

Electronic digital logic circuitry

With test facilitating feature

365201, H03K 1900

Patent

active

056442505

ABSTRACT:
A semiconductor device includes an inner circuit for executing a predetermined function and setting an internal state thereof in response to an internal state setting signal and a current path forming circuit for forming an additional current path between specific two pads in response to the internal state setting signal. Whether or not the internal state of the semiconductor device has been set to a predetermined state, can be externally identified by detecting a current that flows between these specific two pads. The semiconductor device is provided which can be externally identified in simple structure on whether or not the internal state of the semiconductor device has been set to the predetermined state.

REFERENCES:
patent: 5371712 (1994-12-01), Oguchi et al.
patent: 5388077 (1995-02-01), Sanada
patent: 5440516 (1995-08-01), Slemmer
patent: 5471429 (1995-11-01), Lee et al.
patent: 5475646 (1995-12-01), Ogihara

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