SX8650 Datasheet, PDF (4/56 Pages) Semtech Corporation – World’s Lowest Power & Smallest Footprint 4-wire Resistive Touchscreen Controller with 15kV ESD

SX8650
ADVANCED COMMUNICATIONS & SENSING
Table of contents
Section
DATASHEET
Page
4.6.5. I2C Read Channels ................................................................................................................................ 32
4.6.6. Data Channel Format ............................................................................................................................. 33
4.6.7. Invalid Qualified Data .............................................................................................................................. 33
4.7. I2C Register Map .......................................................................................................................................... 34
4.8. Host Control Writing....................................................................................................................................... 35
4.9. Host Commands ............................................................................................................................................ 37
4.10. Power-Up ....................................................................................................................................................... 38
4.11. Reset.............................................................................................................................................................. 38
5. Modes of Operation .............................................................................................................................................. 39
5.1. Manual Mode ................................................................................................................................................. 39
5.1.1. CONVERT Command ............................................................................................................................. 39
5.1.2. SELECT Command................................................................................................................................. 40
5.2. Automatic mode ............................................................................................................................................. 41
5.3. PENDET Mode .............................................................................................................................................. 42
5.4. PENTRIG Mode ............................................................................................................................................. 42
6. Application Information .......................................................................................................................................... 44
6.1. Acquisition Setup ........................................................................................................................................... 44
6.2. Channel Selection.......................................................................................................................................... 44
6.3. Noise Reduction............................................................................................................................................. 44
6.3.1. POWDLY................................................................................................................................................. 44
6.3.2. SETDLY .................................................................................................................................................. 44
6.3.3. AUX Input ................................................................................................................................................ 45
6.4. Channel Biasing............................................................................................................................................. 45
6.5. Interrupt Generation....................................................................................................................................... 45
6.6. Coordinate Throughput Rate ......................................................................................................................... 46
6.6.1. I2C Communication Time........................................................................................................................ 46
6.6.2. Conversion Time ..................................................................................................................................... 46
6.7. Application Schematic.................................................................................................................................... 48
6.8. Application Examples..................................................................................................................................... 49
6.8.1. Soft Keyboard ......................................................................................................................................... 49
6.8.2. Game ...................................................................................................................................................... 49
6.8.3. Handwriting Application........................................................................................................................... 50
6.8.4. Slider Controls......................................................................................................................................... 50
7. Packaging Information ........................................................................................................................................... 51
7.1. Package Outline Drawing .............................................................................................................................. 51
7.1.1. DFN Package .......................................................................................................................................... 51
7.1.2. WLCSP Package .................................................................................................................................... 52
7.2. Land Pattern Drawing .................................................................................................................................... 53
7.2.1. DFN Land Pattern ................................................................................................................................... 53
7.2.2. WLCSP Land Pattern .............................................................................................................................. 54
ACS Revision V2.15/October 2009
©2009 Semtech Corp.
Page 3
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