Datasheet
CY8C20xx6A/H CapSense Design Guide Doc. No. 001-65973 Rev. *A 5
5.3
Electromagnetic Compatibility (EMC) Considerations ......................................................................................... 42
5.3.1 Radiated Interference ............................................................................................................................. 42
5.3.2
Radiated Emissions ................................................................................................................................ 43
5.3.3 Conducted Immunity and Emissions ....................................................................................................... 43
5.4
Software Filtering ................................................................................................................................................. 43
5.5 Power Consumption ............................................................................................................................................ 44
5.5.1
System Design Recommendations ......................................................................................................... 44
5.5.2 Sleep-Scan Method ................................................................................................................................ 44
5.5.3
Response Time versus Power Consumption .......................................................................................... 44
5.5.4 Measuring Average Power Consumption ............................................................................................... 45
5.6
Pin Assignments .................................................................................................................................................. 45
5.7 PCB Layout Guidelines ....................................................................................................................................... 46
6.
Design Considerations ............................................................................................................................................... 47
6.1 Additional Power Saving Techniques .................................................................................................................. 47
6.1.1
Set Drive Modes to Analog High Z .......................................................................................................... 47
6.1.2 Putting it All Together ............................................................................................................................. 48
6.1.3
Sleep Mode Complications ..................................................................................................................... 48
6.1.4 Pending Interrupts .................................................................................................................................. 48
6.1.5 Global Interrupt Enable ........................................................................................................................... 48
6.2 Post Wakeup Execution Sequence ..................................................................................................................... 48
6.2.1
PLL Mode Enabled ................................................................................................................................. 48
6.2.2 Execution of Global Interrupt Enable ...................................................................................................... 49
6.2.3
I2C Slave with Sleep Mode ..................................................................................................................... 49
6.2.4 Sleep Timer ............................................................................................................................................ 49
7.
Resources .................................................................................................................................................................... 50
7.1 Website ............................................................................................................................................................... 50
7.2
Datasheet ............................................................................................................................................................ 50
7.3 Technical Reference Manual ............................................................................................................................... 50
7.4
Development Kits ................................................................................................................................................ 50
7.4.1 Universal CapSense Controller Kit ......................................................................................................... 50
7.4.2
Universal CapSense Module Boards ...................................................................................................... 50
7.4.3 In-Circuit Emulation (ICE) Kits ................................................................................................................ 51
7.5
PSoC Programmer .............................................................................................................................................. 51
7.6 Multi-Chart ........................................................................................................................................................... 51
7.7
PSoC Designer .................................................................................................................................................... 51
7.8 Code Examples ................................................................................................................................................... 52
7.9 Design Support .................................................................................................................................................... 52