| 摘要 |
An integrated peripheral device comprises an associated register. The register comprises a data area containing a password. The register is connected to a read/write control unit, which generates an enabling signal after a first access which allows a data word to be written to the register during a following second write access. The read/write control unit comprises a comparator which compares data transmitted to the peripheral device during a first access with the password and generates a comparison signal, the read/write control unit only generates the enabling signal if the comparator generates a predefined comparison signal, for example, an equality signal.
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