1. 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,
Feb 28, 2018
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2. Schematic of XOR A B A xor B 1
<XOR using AND, OR and NOT>
<XOR using only NAND>
Reference: 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>
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3. Bread Board
Pre-connected electronic board to make simple circuit test.
No need to make soldering to connect devices on the board.
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4. Switch
Vcc = 5.00V
Resistor = 1kOhm
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5. LED
We use a resistor to prevent current from overflowing. Otherwise, LED may be broken down.
R = (Vsupply – VLED) / ILED= (5V – 2V) / 20mA = 150ohm
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6. Chip Specification Vcc = 5.00V <74LS04 NOT Gate>
<74LS08 AND Gate>
<74LS32 OR Gate>
Vcc = 5.00V
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7. <Logic Circuit>
XOR Implementation
<Power Supply>
<Logic Circuit>
<LED Output>
<Button Input>
Vcc = 5.00V
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