manuais Cypress CapSense CY8C20x36

Cypress CapSense CY8C20x36 Guia do Utilizador (75 páginas)

Marca: Cypress | Categoria: Monitor tátil | Tamanho: 3.07 MB |

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Índice

Getting Started with CapSense

1

Contents

3

1. Introduction

6

1.4 Document Conventions

9

2. CapSense Technology

10

2.1.2 Mutual-Capacitance

11

2.3.1 Sensing Methods

12

CY8C21x34/B

13

= External Connection

14

2.4 CapSense Tuning

15

2.4.3 Measuring SNR

16

2.4.4.1 What is SmartSense?

17

2.5 Sensor Types

19

2.5.1.2 Matrix Buttons

20

2.5.2.1 Linear Sliders

20

2.5.2.2 Diplexed Sliders

21

Area contacted by finger

22

Proximity Sensor

22

2.6 Sensor Construction

23

2.7.1 Visual Feedback

24

OFFON OFF

26

2.7.2 Haptic Feedback

28

2.7.3 Audible Feedback

29

2.8 Water Tolerance

31

CapSense Controller

32

3. Design Considerations

33

3.2 ESD Protection

34

Non Conductive

35

Material

35

3.2.2 Redirect

36

3.2.3 Clamp

36

3.3.1.1 Ground Plane

37

3.3.1.2 Series Resistor

37

3.3.1.3 Trace Length

37

3.3.1.4 Current Loop Area

37

CapSense

38

Controller

38

3.3.2 Radiated Emissions

39

3.4 Software Filtering

41

3.4.2 IIR Filter

42

43

3.4.3 Median Filter

44

3.4.4 Jitter Filter

45

Unfiltered

46

Filtered

46

3.5 Power Consumption

47

3.6 Pin Assignments

48

3.7 PCB Layout Guidelines

51

3.7.5 Slider Design

52

3.7.8 Trace Routing

53

3.7.9 Crosstalk Solutions

53

3.7.10 Vias

54

3.7.11 Ground Plane

54

Sensor-1

55

Shield Electrode

56

Guard Sensor

56

Sensor Pads

56

4.1.1.1 CY8CMBR20xx

57

4.1.1.2 CY8C201xx

57

4.1.2.1 CY8C20x34, CapSense

57

5. CapSense Selector Guide

59

Design Requirements

60

7. Resources

65

7.4.5 Evaluation Pods

66

7.5 Demonstration Kit

67

7.6 PSoC Designer

67

7.7 PSoC Programmer

68

C-to-USB Bridge Kit

69

7.10 Design Support

71

8. Appendix

72

Introduced Capacitance, pF

73

8.1.4 Design Examples

74

Cypress dispositivos