| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a security protecting device capable of controlling the use propriety of an ICE without particularly needing an external terminal to ensure security in the security protecting device in a microcomputer. <P>SOLUTION: Collation data is supplied to a JTAG I/F 2 from the ICE 6, and corresponding address data of a built-in memory 4 is acquired as reference data. Both data are compared in a comparing circuit, and coincidence of both data is determined to release a lock mechanism. The lock mechanism is released also when discordant data is below a predetermined value. With this constitution, a lock release device ensuring security can be provided without needing to provide an exclusive terminal for lock release. <P>COPYRIGHT: (C)2007,JPO&INPIT |
