Abstract: A ROM apparatus includes a control circuit for controlling an output buffer to be turned into a high impedance state or an off state for a predetermined time in response to a change of an address signal. For this control circuit, a supply of data read from a wrong address of a memory to an external circuit is prohibited for a duration of a false malfunction which is caused by a precharge of digit lines.

Abstract: A system for controlling a set of electrical devices, e.g. in a motor vehicle, having a decoding module for a group of such devices, the decoding module receiving an electrical signal containing instructions to switch on and to switch off the electrical devices in the group and delivering control signals on the basis of those instructions, and a set of switches controlled by the control signals and each connected between a common electrical power line and a respective electrical device in the group. The controlled switches are mounted in the immediate vicinity of the corresponding electrical devices of the group, and the decoding module is housed in a housing which is separate from the controlled switches.