EasyPoint

Datasheet - Contents

www.austriamicrosystems.com/N50P111

Revision 1.1

2 - 32

Contents

1 General Description ..................................................................................................................................................................

1

2 Key Features.............................................................................................................................................................................

1

3 Applications...............................................................................................................................................................................

1

4 Benefits.....................................................................................................................................................................................

1

5 Pin Assignments .......................................................................................................................................................................

4

5.1 Pin Descriptions.................................................................................................................................................................................... 4

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

5

7 Electrical Characteristics...........................................................................................................................................................

6

7.1 Operating Conditions............................................................................................................................................................................ 6

7.2 Digital IO Pads DC/AC Characteristics................................................................................................................................................. 6

7.3 Switch Characteristics .......................................................................................................................................................................... 7

7.4 Mechanical Specifications .................................................................................................................................................................... 8

7.5 Recommended Reflow Temperature Profile......................................................................................................................................... 8

8 Using the N50P111 Module ......................................................................................................................................................

9

8.1 Powering up the Module....................................................................................................................................................................... 9

8.2 Registers Initialization........................................................................................................................................................................... 9

8.3 C Source Code Example.................................................................................................................................................................... 10

8.3.1 Initialization................................................................................................................................................................................ 10

8.3.2 Offset Calibration ....................................................................................................................................................................... 10

8.3.3 Dead Zone area......................................................................................................................................................................... 11

8.3.4 Interrupt Routine ........................................................................................................................................................................ 11

9 XY Coordinates Interpretation.................................................................................................................................................

12

9.1 EasyPoint Operating Principle............................................................................................................................................................ 12

9.1.1 Knob Displacement and Register Value Relation...................................................................................................................... 13

9.2 Operation Principle............................................................................................................................................................................. 14

10 I²C interface ..........................................................................................................................................................................

15

10.1 Interface Operation........................................................................................................................................................................... 15

10.2 I²C Electrical Specification................................................................................................................................................................ 16

10.3 I²C Timing ......................................................................................................................................................................................... 17

10.4 I²C Modes......................................................................................................................................................................................... 18

10.4.1 Automatic Increment of Address Pointer ................................................................................................................................. 18

10.4.2 Invalid Addresses .................................................................................................................................................................... 18

10.4.3 Reading ................................................................................................................................................................................... 18

10.4.4 Writing...................................................................................................................................................................................... 18

10.4.5 High Speed Mode.................................................................................................................................................................... 21

10.4.6 Automatic Increment of Address Pointer ................................................................................................................................. 22

10.4.7 Invalid Addresses .................................................................................................................................................................... 22

10.5 SDA, SCL Input Filters ..................................................................................................................................................................... 22

11 I²C Registers .........................................................................................................................................................................

23

11.1 Control Register 1 (0Fh) ................................................................................................................................................................... 23

11.2 X Register (10h)................................................................................................................................................................................ 25

11.3 Y_res_int Register (11h) ................................................................................................................................................................... 25

11.4 Xp Register (12h).............................................................................................................................................................................. 25

11.5 Xn Register (13h).............................................................................................................................................................................. 25