Question 4 [Soalan 4] (CO4, C6, PO3) An Automatic Cutting Machine is used to cut a wire into specific length. The machine will start operating when logic '1' is given to their specific input port. Each time it completes cutting the wire, the machine will give an output as a single pulse. The number of the pulse output will represent the total number of wire that has been cut. As an engineer, you are required to design a system based on the 8085 microprocessor that will count the pulse from the machine by incrementing an 8-bit counter represented by 1-bytes of memory and display it to 4 digit seven segments. The total number of wire to be cut is set through keypad and the maximum value is 9999. The hash-key ("#") will be used to start the cutting machine. When the total number of wire cut is equal to the setting value, the system will light up one lamp and give output logic '0' to stop the machine. The system also needs an emergency stop button that will automatically stop the machine immediately. *Hint: Use RST 7.5 to count the pulse input and RST 6.5 for emergency stop button input. [Mesin Pemotong Automatik digunakan untuk memotong wayer kepada spesifikasi panjang yang diperlukan. Mesin akan bermula beroperasi apabila logik 'I' diberi pada spesifikasi port masukan. Setiap kali ia melengkapkan pemotongan wayer, mesin akan memberi keluaran satu denyutan. Bilangan denyutan keluaran akan mewakili jumlah bilangan wayer yang dipotong. Sebagai jurutera, anda diminta untuk mereka satu sistem mikropemproses 8085 untuk mengira denyutan daripada peningkatan pembilang mesin tersebut secara 8-bit diwakili oleh 1-bait ingatan dan memaparkan kepada 4 digit paparan 7-ruas. Jumlah bilangan wayer yang dipotong akan dimasukkan melalui papan- kekunci dan nilai maksimum ialah 9999. Butang hash ("#") akan digunakan untuk memulakan mesin pemotong. Apabila jumlah bilangan wayar yang dipotong melintasi nilai yang disetkan, sistem akan menyalakan satu lampu dan mesin akan diberhentikan dengan memberikan keluaran logik '0'. Sistem ini juga memerlukan suis butang kecemasan untuk memberhentikan mesin secara automatik bila berlaku kecemasan.] ["Pembayang: Gunakan RST 7.5 untuk membilang denyutan masukan dan RST 6.5 untuk masukan suis tekan kecemasan] (i) Sketch the schematic diagram and show in detail the interface circuit between microprocessor system and all the devices given. [Lakarkan rajah skematik dan tunjukkan dengan terperinci litar pengantaramukaan antara sistem mikropemproses dengan semua peralatan yang diberikan.] (ii) Draw a flowchart for the system. [Lukiskan cartalir bagi sistem tersebut] (iii) Write a program in assembly language to control the overall system. [Tuliskan aturcara dalam bahasa himpunan untuk mengawal keseluruhan sistem.]

Design a circuit that controls the passage of a signal "A" with the specifications: 1. Output X will equal A when control B and C are the same 2. X will remain HIGH when B and C are different. Hint: Set "A" input as a CLK pin.

Task 1: You are to design a 4-bit arithmetic unit that consists of a 4-bit adder/subtractor circuit. The arithmetic unit takes as inputs two 4-bit numbers (A and B) and one control input (M) add/subtract selector that selects the type of operation the unit will perform. When the input control is ‘0’, the input numbers are added. When it is set to ‘1’, the two input numbers are subtracted (A - B)

The logic function implemented by the multiplexer circuit is (ground implies a logic "0") 4x1 MUX 1。 1₁ 1₂ 13 S₁ S₂ P Q Y -F

Choose the true H-bridge motor statements in the list below. O The L298N has a PWM input signal that can be used to control the motor direction. (false, it controls the speed of the motor. O You should always transition through the "Off" state when changing direction with the H-bridge. O The H-bridge provides a means of controlling a motors spin direction. O If all four H-bridge switches are open, the motors will spin. O The H-bridge uses four switches to control the current flow.

The multiplexer has the input states of Do=1, D1=1, D2=1, D3=0 So=1, S1=0 Determine the output of this multiplexer. Do Di Output D2 D3 s0 mux MUX

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Question 9

Question 3 What is the output f of this multiplexer when W1 = 0 and W2=0? W2 W3 OA.0 OB. 1 OC.W2 D.W3 W₁