Example: Nasn syStem C1 self-checking connect W1 diagnostics C3 controlE O102|03 lose Switching Oi=o,, open array
C1 C2 C3 connect control self-checking diagnostics W1 W2 O1 O2 O3 Switching array Oi=1, closed Oi=0, open Example : NASN system
Example: Nasn syStem a Inputs/output variables C1, C2, C3: Ci=1, computer-i is failed. a Represent the operation status of three computers, generated by the self-checking components. a O1, 02, 03: Oi=1, computer-i is connected. a Computer disconnect control signal output a Used to connect or disconnect computer determined by the self-checking results W1 W2
Inputs/output variables ◼ C1, C2, C3; Ci=1, computer-i is failed. Represent the operation status of three computers, generated by the self-checking components. ◼ O1, O2, O3; Oi=1, computer-i is connected. Computer disconnect control signal output Used to connect or disconnect computer determined by the self-checking results. ◼ W1, W2 Example : NASN system
Example: NASN system c1c2c3|010203W1W2 0000111 00110011 010 010 11110000 11001100 00101010 00010110 00000001
C1 C2 C3 O1 O2 O3 W1 W2 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 0 0 1 1 0 0 0 0 1 0 1 0 1 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 Example : NASN system
Design a combinational logic circuit a Simplify the functions in Problem statement deriving the output equation the best solving Truth table Construction is the fewest gates and gate input a Arrange the simplified switching equations written equations to suit the logic type which are requested Equations simplified in realizing the circuit 口 Draw the final logic Logic diagram drawn diagram Logic circuit built
Design a combinational logic circuit Simplify the functions in deriving the output equation. the best solving is the fewest gates and gate input. Arrange the simplified equations to suit the logic type which are requested in realizing the circuit. Draw the final logic diagram. Logic circuit built Logic diagram drawn Equations simplified switching equations written Truth table Construction Problem statement