Cypress CapSense CY8C20x36 Guia do Utilizador Página 66
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66 Document No. 001-64846 Rev. *I Getting Started with CapSense
®
Note CY3280-20x34 Universal CapSense Controller and CY3280-21x34 Universal CapSense Controller kits are
available only as a part of the CY3280-BK1 Universal CapSense Controller - Basic Kit 1.
7.4.2 Universal CapSense Module Boards
7.4.2.1 Simple Button Module Board
The CY3280-BSM Simple Button Module consists of ten CapSense buttons and ten LEDs. This module connects to
any CY3280 Universal CapSense Controller Board.
7.4.2.2 Matrix Button Module Board
The CY3280-BMM Matrix Button Module consists of eight LEDs as well as eight CapSense sensors organized in a
4x4 matrix format to form 16 physical buttons. This module connects to any CY3280 Universal CapSense Controller
Board.
7.4.2.3 Linear Slider Module Board
The CY3280-SLM Linear Slider Module consists of five CapSense buttons, one linear slider (with ten sensors), and
five LEDs. This module connects to any CY3280 Universal CapSense Controller Board.
7.4.2.4 Radial Slider Module Board
The CY3280-SRM Radial Slider Module consists of four CapSense buttons, one radial slider (with ten sensors), and
four LEDs. This module connects to any CY3280 Universal CapSense Controller Board.
7.4.2.5 Universal CapSense Prototyping Module
The CY3280-BBM Universal CapSense Prototyping Module provides access to every signal routed to the 44-pin
connector on the attached controller board(s). The prototyping module board is used in conjunction with a Universal
CapSense Controller board to implement additional functionality that is not part of the other single-purpose Universal
CapSense Module boards.
7.4.3 CapSense Express Evaluation Kits for CY8C201xx
CY8C3218-CAPEXP series of CapSense Express evaluation kits available for CY8C201xx family of devices enables
designers to replace mechanical buttons/sliders by implementing touch sensing designs with the CapSense touch
sensing family, CapSense Express. With Cypress's PSoC Designer visual embedded system design tool and
CapSense Express configuration tool, designers configure, monitor, and tune buttons or sliders, LEDs, and other
general purpose I/Os over I
2
C in real time using a graphical user interface. The following are the lists of CapSense
Express evaluation kits available for CY8C201xx family of devices.
CY3218-CAPEXP1 CapSense Express Kit (Up to 10 I/O for Buttons) with CY8C20110 device
CY3218-CAPEXP2 CapSense Express Kit (Up to 10 I/O for Sliders) with CY8C201A0 device
7.4.4 CapSense Express Evaluation Kits for CY8CMBR2044
CY3280-MBR CapSense Express kit for CY8CMBR2044 device enables designers to replace mechanical buttons
with CapSense buttons. Designers can configure up to four CapSense buttons in hardware, eliminating the need for
software tools, firmware development, and chip programming.
7.4.5 Evaluation Pods
PSoC EvalPods are pods that connect to the ICE In-Circuit Emulator (CY3215-DK kit) to allow debugging capability.
They can also function as a standalone device without debugging capability. The EvalPod has a 28-pin DIP footprint
on the bottom for easy connection to development kits or other hardware. The top of the EvalPod has prototyping
headers for easy connection to the devices pins. The following are the evaluation pods available.
CY3210-CY8C20x34 PSoC Evaluation Pod (EvalPod)
CY3210-CY8C21x34 PSoC Evaluation Pod (EvalPod)
CY3210-CY8C20x36/46/66 PSoC Evaluation Pod (EvalPod)
CY3210-CY8C24x94 PSoC Evaluation Pod (EvalPod)
- 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
- Equation 18 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
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