Power Electronics Ltd Specification for ApprovalCustomer：__Product name：Capacitive Touch Screen ModuleModel：QT703018EUPEaVersion: Ver01Customer Approval: __________________________Approved by Reviewed by Prepared byPower Electronics LtdRm. A&F,7/F,150 Dongyuan Rd,Shenzhen,China.Phone :( 86) 755 61692426Fax: (86)755 61692423Email:kelvin.ho@pel.hk <kelvin.ho@pel.hk>Product SpecificationD OC.V ERSION 1.0Power Electronics LtdMay 2010Specification Revision RecordNo Version Date Summary of changes Page 1Ver01 Newly CreatedRemarks:Index1. Features (4)2. Appearance Inspection (5)2.1 Inspection Conditions (5)2.2 Appearance Criteria (5)3. Cover Lens Process (7)4. Model (7)5. Electrical Characteristics (7)6. Reliability (8)7. Durability (9)8. Application Guide (10)8.1 Environment (10)8.2 Block diagram (10)8.3 Hardware Connect (10)8.4 Communication protocol and calibration (11)8.5 Read data（ChaCha to Host） (11)8.6 Mode switch (13)9 Important items of motions (16)10. Handing precautions (17)11 Structure chart (18)1. FeaturesItem Contents UnitType Projective Capacitive Multi-touchTP size (inch) 7.0’’Outline Dimension（Cover）164.9 X104.34 mmViewing Area 155.3 X 94.34 mm Active Area 152.4 X 91.44 mm Interface I2COperation Voltage 2.8V ~ 5.5VCurrent Consumption @3.0V, @25℃<0.4mA@sleep Mode, , <2mA @ Watch Mode <4mA@ Active Mode, <5mA@ Fast ModeScan rate 0Hz@sleep Mode, , ~10Hz@ Watch Mode,~40Hz@ Active Mode，~100Hz@ Fast Mode /panelCalibration mode Calibrate for noise environment changes (within 400m seconds)Resolution >500 dpiInput force <10gInput method Finger or exclusive pen Transparency >85%Surface hardness >7HScope This specification applies for finger input transparent touch panel.(These mentioned in the individual specification shall be given priority.)Application The product is touch panels used as the input devices for general electric appliances and OA equipment.2. Appearance Inspection；DisregardNote:Each test shall be done at a normal condition (23℃60%RH) unless otherwise specified separately.3. Cover Lens ProcessItem Contents Compression Resistance400 ~ 500 mPAChemistry Strengthen8 ~ 12 um / potassium ion Hardness>7H4. ModelConstruction Materials used remarkFirst Layer Cover Glass Thickness:1.5 mm Second Layer UV-Curing Thickness:0.15mm Third Layer ITO Glass Thickness:0.55mm5. Electrical CharacteristicsItem Specifications ESD (Machine model)±300V 200pF, 0 Ω, 5 timesESD (Human body model) ±1000V, 100pF, 1500Ω, 5 times ESD touching surface(Contacted)4KV, 100pF, 1500Ω, 5 times ESD touching surface (Air-discharge) 10KV, 100pF, 1500Ω, 5 timesItem Description Unit Supply Voltage from VDD to VSS-0.5 ~ 7.0 V Voltage from any pin to VSS-0.5 ~ 7.0 V Chip level ESD (HBM test) 26. ReliabilityItem Specification RemarksOperating temperature andhumidity -10~60℃，20~85% RHExcept for dewgatheringStorage temperature andhumidity -20~70℃,20~85% RHExcept for dewgatheringHumidity resistance 85% RH, 240H Except for dew gatheringHeat resistance 70℃,240H Except for dew gatheringCold resistance -20℃,240H Except for dew gatheringThermal shock -20℃(0.5hour)-70℃(0.5hour)by 50 cyclesExcept for dewgatheringVibration resistance 20 m/s2,10Hz to 55Hz(1min)is given for 30 mins.each in the directions ofX,Y,Z.Except for dewgatheringHumidity resistance The requirement in 4 shall besatisfied after exposing at60℃,90% RH for 240 hoursand normal temperature andhumidity for 24 hours.Except for dewgatheringHeat resistanceThe requirements in 4 shallbe satisfied after exposing at70℃,for 240 hours and atnormal temperature andhumidity for 24 hours.Except for dewgatheringCold resistanceThe requirements in 4 shallbe satisfied after exposing at-20℃, for 240 hours and atnormal temperature andhumidity for 24 hours.Except for dewgatheringNote:1：The reliability test shall be done with the touch panel put on a clean, flat board, and with the circuit open.2：Test environment must be clean room, class 10k or higher, make sure there is no crack, scratch, or foreign objects8. Application Guide8.1 EnvironmentItem Specification Remarks thermometer -10~60ºChumidity 20~85% RH8.2 Block diagramIC Pin ConfigurationPin NO Pin name Description1 NC2 SDA I2C DATA3 SCL I2C Clock4 GND Ground Connection5 VDD Supply voltage VDD:5V6 NC7 NC8 RST Reset pin9 ATTN ATTN line8.3 Hardware ConnectHost MCU can be use i2c interface to communicate with ChaCha, the SDA ,SCK and ATTN pin also need a pull up resistor to maintain the I2C bus voltage status.8.4 Communication protocol and calibrationThe touch panel uses the I2C communication protocols, the HOST must set the clock to 100khzPlease open the exterior interrupt,and prepare a falling edge interruptThe objective of the calibration is to measure the capacitance offsets and the noise offset of the electrode system when no finger is touching, and to store these values into EEPROM.After power on,the calibration must be done when we use the ITO panel at the first time, The HOST will pull low the ATTN line,then the HOST will send the command as follows in 3.8 ms to calibrate.After the command was sent,the HOST will release the ATTN line,that the ATTN line will return high ,then ChaCha will complete calibration in 500ms,during the 500ms,the HOST will not send any command.After the calibration be done,the HOST must clear the register, the command as follow:NOTE：There must be no finger on the ITO panel during the calibrationAfter power on,the panel need to calibrate only one time 。