參數(shù)資料
型號： AD7877ACPZ-500RL7
廠商： ANALOG DEVICES INC
元件分類： 消費家電
英文描述： Touch Screen Controller
中文描述： SPECIALTY CONSUMER CIRCUIT, QCC32
封裝： 5 X 5 MM, ROHS COMPLIANT, MO-220VHHD-2, LFCSP-32
文件頁數(shù)： 2/44頁
文件大?。?/td> 1002K
代理商： AD7877ACPZ-500RL7
AD7877
TABLE OF CONTENTS
Specifications.....................................................................................3
Rev. A | Page 2 of 44
Timing Specifications.......................................................................5
Absolute Maximum Ratings............................................................6
ESD Caution..................................................................................6
Pin Configuration and Function Descriptions.............................7
Terminology......................................................................................9
Typical Performance Characteristics...........................................10
Circuit Information........................................................................14
Touch Screen Principles ............................................................14
Measuring Touch Screen Inputs...............................................15
Touch-Pressure Measurement..................................................16
STOPACQ Pin ............................................................................16
Temperature Measurement.......................................................17
Battery Measurement.................................................................18
Auxiliary Inputs..........................................................................19
Limit Comparison......................................................................19
Control Registers............................................................................20
Control Register 1.......................................................................20
Control Register 2.......................................................................21
Sequencer Registers ................................................................... 22
Interrupts..................................................................................... 24
Syncronizing the AD7877 to the Host CPU........................... 25
8-Bit DAC........................................................................................ 26
Serial Interface................................................................................ 28
Writing Data ............................................................................... 28
Write Timing............................................................................... 29
Reading Data............................................................................... 29
V
DRIVE
Pin..................................................................................... 29
General-Purpose I/O Pins............................................................. 30
GPIO Configuration.................................................................. 30
Grounding and LayouT................................................................. 32
PCB Design Guidelines for Chip Scale Packages................... 32
Register Maps.................................................................................. 33
Detailed Register Descriptions..................................................... 35
GPIO Registers........................................................................... 41
Outline Dimensions....................................................................... 43
Ordering Guide .......................................................................... 43
REVISION HISTORY
11/04—Changed from Rev. 0 to Rev. A
Changes to Absolute Maximum Ratings ...................................... 6
Changes to Figure 4.......................................................................... 7
Changes to Table 4............................................................................ 7
Changes to Grounding and Layout section ................................32
Changes to Figure 42......................................................................32
Changes to Ordering Guide..........................................................43
7/04—Revision 0: Initial Version
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