Introduction to Digital System and Microprocessor Design

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Presentation transcript:

Introduction to Digital System and Microprocessor Design Week 2, XOR Introduction to Digital System and Microprocessor Design Inhwan Lee, Youngtaek Oh, Yulhwa Kim (inhwan301, koyt1126, yulhwa.kim)@postech.ac.kr Feb 28, 2018 1/7

Schematic of XOR A B A xor B 1 <XOR using AND, OR and NOT> <XOR using only NAND> Reference: http://www.play-hookey.com/digital/combinational/xor_function.html A B A xor B 1 XOR can be implemented in two ways using AND, OR and NOT (left) / only NAND (right). We will cover the method using AND, OR and NOT in this class. <Truth Table of XOR> 2/7

Bread Board Pre-connected electronic board to make simple circuit test. No need to make soldering to connect devices on the board. 3/7

Switch Vcc = 5.00V Resistor = 1kOhm 4/7

LED We use a resistor to prevent current from overflowing. Otherwise, LED may be broken down. R = (Vsupply – VLED) / ILED= (5V – 2V) / 20mA = 150ohm 5/7

Chip Specification Vcc = 5.00V <74LS04 NOT Gate> <74LS08 AND Gate> <74LS32 OR Gate> Vcc = 5.00V 6/7

<Logic Circuit> XOR Implementation <Power Supply> <Logic Circuit> <LED Output> <Button Input> Vcc = 5.00V 7/7