| 摘要 |
An integrated circuit (IC) which can function in a number of different operating modes is set to a setting mode by a control signal (SR1) on the control signal input (R). The circuit (IC) includes a signal sequence generator (PG) which in the setting mode generates setting signal sequences (SA0-SA3) on four of the address connections (A0-A3) of the circuit (IC). An operating mode is selected by coupling one of the address connections (A3) with a setting signal input (M) on a signal sequence detector (PD) in the circuit (IC). The signal sequence detector (PD) interprets the setting signal sequence (SA3) from the signal sequence generator (PG) and sets control outputs (PO1, PO2, SO1, SO2) on the signal sequence detector (PD) to different combinations of "low" and "high" signal levels respectively in dependence on the sequence (SM1) received in the detector (PD), whereafter the circuit (IC) switches to an operating mode in which the address conductors (A0-A3) forward signals in accordance with the operating mode. |
