SX8652ICSTRT Semtech, SX8652ICSTRT Datasheet - Page 2
SX8652ICSTRT
Manufacturer Part Number
SX8652ICSTRT
Description
4/5-wire Resistive Touch Screen Controller (SPI)
Manufacturer
Semtech
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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