sx8652 Semtech Corporation, sx8652 Datasheet - Page 2

• Manufacturer Part Number: sx8652
• Description: 15kv Esd Low Power 4-wire / 5-wire Resistive Touchscreen Controller With Spi Interface
• Manufacturer: Semtech Corporation

Section
1.
2.
3.
4.
5.
6.
Revision V1.6/July 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Table of contents
1.1.
1.2.
1.3.
1.4.
2.1.
2.2.
2.3.
2.4.
2.5.
2.6.
3.1.
3.2.
3.3.
3.4.
4.1.
4.2.
4.3.
4.4.
5.1.
5.2.
5.3.
6.1.
6.2.
6.3.
General Description ................................................................................................................................................. 4
Electrical Characteristics ......................................................................................................................................... 6
Functional Description ........................................................................................................................................... 10
4-wire Touch Screen Detailed Description ............................................................................................................ 13
5-wire Touch Screen Detailed Description ............................................................................................................ 16
Data Processing .................................................................................................................................................... 17
3.2.1.
3.2.2.
3.3.1.
3.3.2.
6.1.1.
6.1.2.
6.1.3.
6.1.4.
6.1.5.
DFN Pinout Diagram and Marking Information (Top View).............................................................................. 4
WLCSP Pinout Diagram and Marking Information (Top View) ........................................................................ 4
Pin Description................................................................................................................................................. 5
Simplified Block Diagram ................................................................................................................................. 5
Absolute Maximum Ratings ............................................................................................................................. 6
Recommended Operating Conditions.............................................................................................................. 6
Thermal Characteristics ................................................................................................................................... 6
Electrical Specifications ................................................................................................................................... 7
Host Interface Specifications ........................................................................................................................... 9
Host Interface Timing Waveforms.................................................................................................................... 9
Host Interface and Control Pins ..................................................................................................................... 11
Power Management Pins............................................................................................................................... 12
Touch Screen Operation................................................................................................................................ 13
Coordinates Measurement............................................................................................................................. 14
Pressure Measurement.................................................................................................................................. 14
Pen Detection ................................................................................................................................................ 15
Touch Screen Operation................................................................................................................................ 16
Coordinates Measurement............................................................................................................................. 16
Pen Detection ................................................................................................................................................ 17
Host Interface and Control ............................................................................................................................. 17
Host Control Writing ...................................................................................................................................... 22
General Introduction ..................................................................................................................................... 10
Channel Pins................................................................................................................................................. 11
Register Map................................................................................................................................................. 21
X+/BR, X-/TL, Y+/TR. Y-/BL.................................................................................................................... 11
AUX/WIPER ............................................................................................................................................ 11
NIRQ ....................................................................................................................................................... 11
NRST ...................................................................................................................................................... 12
SPI Read/Write Registers ....................................................................................................................... 18
SPI Reading Channel Data ..................................................................................................................... 18
Multiple Read/Write ................................................................................................................................. 18
SPI Host Commands............................................................................................................................... 19
Invalid Qualified Data .............................................................................................................................. 20
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