Peripheral device with access control

Details Peripheral device with access control Peripheral device with access control

1998-04-17

2000-10-31

Iqbal, Nadeem

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

713202, G06F 1100

Patent

active

061417742

ABSTRACT:
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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