book

Embedded System Interfacing

by Marilyn Wolf

February 2019

Intermediate to advanced

237 pages

7h 11m

English

Morgan Kaufmann

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Abstract1.1 Interfacing Computers to the Physical World1.2 Goals and Techniques1.3 Varieties of Microprocessors1.4 Signals1.5 Resistive Circuits1.6 Capacitive and Inductive Circuits1.7 Circuit Analysis1.8 Nonlinear and Active Devices1.9 Design Methodologies and Tools1.10 How to Read This BookQuestions
Abstract2.1 Introduction2.2 RS-2322.3 I2C, CAN, and I2S2.4 USB2.5 WiFi2.6 Zigbee2.7 Bluetooth and Bluetooth Low Energy2.8 LoRaWAN2.9 Internet-Enabled DevicesQuestions
Abstract3.1 Introduction3.2 Digital Logic Specifications3.3 CMOS Logic Circuits3.4 High-Impedance and Open-Drain Outputs3.5 Example: Open-Drain and High-Impedance Busses3.6 Registers3.7 Programmable Logic3.8 CPU Interface Structures3.9 Logic Protection and Noise3.10 Auxiliary Devices and Circuits3.11 Example: Shaft EncoderFurther ReadingQuestions
Abstract4.1 Introduction4.2 Amplifier Specifications4.3 Circuit Analysis Methods4.4 MOSFET Transistor Models4.5 MOSFET Amplifier Topologies4.6 Example: Driving a Low-Impedance Load4.7 Power Amplifiers4.8 Integrated Amplifiers4.9 Op Amps4.10 Noise, Interference, and Crosstalk4.11 Example: Amplifying an Electret MicrophoneFurther ReadingQuestions

Abstract5.1 Introduction5.2 Filter Specifications5.3 The RLC Tank Circuit5.4 Transfer Functions5.5 From Filter Specification to Transfer Function5.6 Op Amp Filters5.7 Example: Bass Boost Filter5.8 Advanced Filter Types5.9 Digital Filters5.10 Pulse and Timing Circuits5.11 Signal Generators5.12 Example: Arbitrary Waveform Generator5.13 Signal Detectors5.14 Example: Headphone Jack DetectorFurther ReadingQuestions
Abstract6.1 Introduction6.2 The Nyquist Rate6.3 Conversion Specifications6.4 Digital/Analog Conversion6.5 Analog/Digital Conversion6.6 Example: R-2R Digital/Analog ConverterQuestions
Abstract7.1 Introduction7.2 Power Supply Specifications7.3 AC-to-DC Power Supplies7.4 Power Converters7.5 Batteries7.6 Example: Linear Regulated Power Supply7.7 Thermal Characteristics and Heat Dissipation7.8 Power ManagementFurther ReadingQuestions
Abstract8.1 Introduction8.2 Embedded System Use Cases8.3 Interface Specifications8.4 Interface Architecture8.5 Choosing the Right Platform8.6 Construction Technologies8.7 Control and Closed-Loop Systems8.8 The Hardware/Software Boundary8.9 Example: A Simple Driver8.10 The Analog/Digital Boundary8.11 Interface Design Methodologies8.12 Example: Clap Detector8.13 Example: Motor ControllerFurther ReadingQuestions
AbstractA.1 IntroductionA.2 TTL Logic CircuitsA.3 High-Impedance and Open OutputsA.4 Example: Open-Collector and High-Impedance BussesQuestions
AbstractB.1 IntroductionB.2 Bipolar Transistor ModelsB.3 Bipolar Amplifier TopologiesB.4 Low-Power Bipolar AmplifiersB.5 Driving a Low-Impedance Load Using Bipolar AmplifiersQuestions

Content preview from Embedded System Interfacing

Chapter 3

Logic

Abstract

Embedded system interfacing often requires us to mix and match components, exposing incompatibilities. In these cases, an understanding of the circuit characteristics of logic is essential to ensuring that the logic works as intended. This chapter reviews CMOS logic characteristics. Logic levels, current drive capability, and timing are critical requirements for interfacing logic. Design examples include open-collector and high-impedance interfaces and a shaft encoder.

Keywords

Digital logic; CMOS; MOSFET; LED; Logic levels

3.1 Introduction

Logic design is a critical component in embedded interfaces. When we design logic using components that have been designed to work together, we can concentrate on their logical ...