| 摘要 |
According to embodiments, a CPU includes an address decoder configured to control input of data from a JTAG I/F and output of data to the JTAG I/F, an authentication unit configured to perform predetermined authentication processing using an entered password and a predetermined key and, if the authentication is successful, output a predetermined authentication signal, and a selector configured to control output of data to be outputted to JTAG I/F according to presence or absence of the predetermined authentication signal.
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