US 7,924,636 B2Granted

Electronic circuit device

AssigneeKyushu Institute of Technology

InventorsHiroyuki Morimoto, Kazuyuki Nakamura

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Abstract

To provide an electronic circuit device that can change a characteristic after package sealing and that achieves a reduction in miscellaneous tasks during characteristic setting. The electronic circuit device includes: a burst detecting circuit 7 for detecting, from an input and output terminal 4, a prescribed write activation burst having a length that is larger than or equal to a prescribed time; a signal-pattern detecting circuit 9 for putting a serial interface 8 into an input-enable state in which setting data can be input, when the write activation burst is detected; and a volatile memory 10 and a nonvolatile memory 11 for storing, in the input-enable state, a setting-data signal input from the input and output terminal 4. An operation state of a functional circuit 6 is set in accordance with the setting data written in the volatile memory 10 or the nonvolatile memory 11.

Claims16

Dependent claims

An electronic circuit device having a circuit main-unit sealed with a package and multiple terminals that connect the circuit main-unit and an external circuit, the electronic circuit device being characterized in that

the circuit main-unit comprises:
a functional circuit;
a burst detecting circuit for detecting, from a predetermined terminal of any of the terminals, a prescribed burst signal (hereinafter referred to as a “write activation burst”) having a length that is larger than or equal to a prescribed time;
data-reception permitting means for putting the circuit main-unit into an input-enable state in which setting data can be input, when the write activation burst is detected;
and
data storing means for storing, in the input-enable state, setting data input from the predetermined terminal;
wherein an operation state of the functional circuit is set in accordance with information of the setting data written to the data storing means.

4 more elements

Dependencies are inferred from the claim text.