| 摘要 |
<p>PROBLEM TO BE SOLVED: To read out data inhibited from being read out from the outside. SOLUTION: Relating to the semiconductor storage device, a read determining circuit 18 determines security data corresponding to data read out from a PROM core 11, and at the time of determining that the security data indicate read inhibition, an output gate 17 connecting an internal data bus 14 to an external data bus 15 is interrupted. A read inhibition releasing circuit 19 is inserted between the circuit 18 and the gate 17, and at the time of releasing read inhibition, a wiring 193 in the circuit 19 is cut off.</p> |
