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XPT2046 Datasheet PDF : 30 Pages
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XPT2046 Touch Screen Controller
CONTENTS
GENERAL DESCRIPTION .............................................................................................................3
FEATURES......................................................................................................................................... 3
APPLICATIONS................................................................................................................................ 3
BLOCK DIAGRAM ..........................................................................................................................4
ABSOLUTE MAXIMUM RATINGS ..............................................................................................4
ELECTRICAL CHARACTERISTICS ...........................................................................................5
PIN CONFIGURATION ...................................................................................................................8
PIN LAYOUT ......................................................................................................................................8
PIN DESCRIPTION...............................................................................................................................9
TYPICAL CHARACTERISTICS ..................................................................................................10
THEORY OF OPRATION..............................................................................................................13
BASIC OPERATION OF THE XPT2046...............................................................................................13
ANALOG INPUT................................................................................................................................14
INTERNAL REFERENCE.....................................................................................................................15
REFERENCE INPUT ...........................................................................................................................16
SIMPLIFIED DIAGRAM OF SINGLE-ENDED REFERENCE ....................................................................16
SIMPLIFIED DIAGRAM OF DIFFERENTIAL REFERENCE......................................................................17
TOUCH SCREEN SETTLING ...............................................................................................................17
TEMPERATURE MEASUREMENT .......................................................................................................18
BATTERY MEASUREMENT ...............................................................................................................19
PRESSURE MEASUREMEN ................................................................................................................20
DIGITAL INTERFACE...................................................................................................................21
PENIRQ OUTPUT ..........................................................................................................................24
PER-CONVERSION .......................................................................................................................26
16 CLOCKS-PER-CONVERSION.........................................................................................................26
DIGITAL TIMING ..............................................................................................................................26
15 CLOCKS-PER-CONVERSION.........................................................................................................28
DATA FORMAT ................................................................................................................................28
8-BIT CONVERSION .........................................................................................................................29
POWER DISSIPATION ..................................................................................................................29
DEMO ...............................................................................................................................................30
Copyright©2007, SHENZHEN XPTEK TECHNOLOGY CO.,LTD http://www.xptek.com.cn
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