INTERFACE CIRCUIT OF THE SLAVE TYPE

摘要

A slave-type interface circuit which can receive signals from a bus if the coding A0, A1 and A2 of its inputs S0, S1 and S2 corresponds to that mode of operation. The signals from the bus are then delivered to the inputs L1 and L2. With another mode of operation the coding of inputs S0, S1 and S2 corresponds to off-line operation on the basis of logic levels applied to the same inputs L1 and L2. A branching block (SBL) directs the signals from the inputs L1 and L2 either to a bus receiver RBUS or directly to a decoder CDEC controlling a group of switches (COM). In the case of operation with a bus, the bus receiver (RBUS) controls the logic for the progress for operations.