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MICROPROCESSORSWhich port has dual functionality in 8051? (i) Port 0 (ii) Port 2 (iii) Port 1 (iv) Port 320252mMICROPROCESSORSWhich among the below mentioned functions does not belong to the category of alternate functions usually performed by Port 3 (Pins 10-17)? (i) External interrupts (ii) Internal interrupts (iii) Serial ports (iv) Read/Write control signals20202mMICROPROCESSORSWrite short notes on: I/O Ports20227mOPERATING SYSTEMAn I/O port typically consists of four registers-status, control, ______ and ______ registers. (i) system in, system out (ii) flow in, flow out (iii) data in, data out (iv) input, output20242m