Revision V1.5/June 2010

©2010 Semtech Corp.

SX8652

www.semtech.com

Page 2

Section

Page

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Table of contents

1.

General Description ................................................................................................................................................. 4

1.1.

DFN Pinout Diagram and Marking Information (Top View).............................................................................. 4

1.2.

WLCSP Pinout Diagram and Marking Information (Top View) ........................................................................ 4

1.3.

Pin Description................................................................................................................................................. 5

1.4.

Simplified Block Diagram ................................................................................................................................. 5

2.

Electrical Characteristics ......................................................................................................................................... 6

2.1.

Absolute Maximum Ratings ............................................................................................................................. 6

2.2.

Recommended Operating Conditions.............................................................................................................. 6

2.3.

Thermal Characteristics ................................................................................................................................... 6

2.4.

Electrical Specifications ................................................................................................................................... 7

2.5.

Host Interface Specifications ........................................................................................................................... 9

2.6.

Host Interface Timing Waveforms.................................................................................................................... 9

3.

Functional Description ........................................................................................................................................... 10

3.1.

General Introduction ..................................................................................................................................... 10

3.2.

Channel Pins................................................................................................................................................. 11

3.2.1.

X+/BR, X-/TL, Y+/TR. Y-/BL.................................................................................................................... 11

3.2.2.

AUX/WIPER ............................................................................................................................................ 11

3.3.

Host Interface and Control Pins ..................................................................................................................... 11

3.3.1.

NIRQ ....................................................................................................................................................... 11

3.3.2.

NRST ...................................................................................................................................................... 12

3.4.

Power Management Pins............................................................................................................................... 12

4.

4-wire Touch Screen Detailed Description ............................................................................................................ 13

4.1.

Touch Screen Operation ................................................................................................................................ 13

4.2.

Coordinates Measurement............................................................................................................................. 14

4.3.

Pressure Measurement.................................................................................................................................. 14

4.4.

Pen Detection ................................................................................................................................................ 15

5.

5-wire Touch Screen Detailed Description ............................................................................................................ 16

5.1.

Touch Screen Operation ................................................................................................................................ 16

5.2.

Coordinates Measurement............................................................................................................................. 16

5.3.

Pen Detection ................................................................................................................................................ 17

6.

Data Processing .................................................................................................................................................... 17

6.1.

Host Interface and Control ............................................................................................................................. 17

6.1.1.

SPI Read/Write Registers ....................................................................................................................... 18

6.1.2.

SPI Reading Channel Data ..................................................................................................................... 18

6.1.3.

Multiple Read/Write ................................................................................................................................. 18

6.1.4.

SPI Host Commands............................................................................................................................... 19

6.1.5.

Invalid Qualified Data .............................................................................................................................. 20

6.2.

Register Map................................................................................................................................................. 21

6.3.

Host Control Writing ...................................................................................................................................... 22