INTEGRATED CIRCUIT

PURPOSE:To improve the reliability of a logical output IC and to prevent a rise of the cost of an IC, by designating freely a logical output when an output port register of the logical output IC is reset in response to the logical value stored in a memory. CONSTITUTION:Logical values are stored in memory parts 30-3n-1 of a memory 3 in response to a desired logical output obtained when output terminals 80-8n-1 of an output port register 2 are reset. A logical control circuit 4 controls the logical output of the register 2 in accordance with the storage contents of the memory 3 when the circuit 4 is reset after application of a power supply. Therefore flip-flop circuits F0-Fn-1 of the register 2 are set or reset when a reset signal RS' arrives in response to the logical values of storage contents M0-Mn-1 of the memory 3. Then it is possible to designate the logical outputs of output terminals 80-8n-1 of the register 2 at desired levels, respectively.