embedded development board product datasheet emb028tftdev · 3. backlight power an on-board...
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Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 1 of 13
Website:www.displaytech-us.com
Embedded Development Board Product Datasheet
EMB028TFTDEV
2.8”TFTDevelopmentBoardforMicrochipDevelopmentTools
Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 2 of 13
Revision Record
REV CHANGES DATE A First Release April 29, 2013
B4 Updated schematic, drawing and text to reflect changes made in revision B4. Added 3D views of PCB. Added Appendix A. May 18, 2016
Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 3 of 13
Table of Contents 1. PRODUCTDESCRIPTION.............................................................................................................42. EXTERNALINTERFACES..............................................................................................................42.1. DISPLAYCONNECTORV1(16-BITRGB)INTERFACE.......................................................................42.2. PICTAILPLUS(16-BITPARALLEL)INTERFACE.................................................................................4
3. BACKLIGHTPOWER......................................................................................................................44. EXAMPLESOFTWARE...................................................................................................................45. PINCONNECTIONTABLE.............................................................................................................56. MECHANICALDRAWING..............................................................................................................67. PRINTEDCIRCUITBOARD..........................................................................................................77.1. SCHEMATIC.................................................................................................................................................77.2. 3DPCBTOPVIEW...................................................................................................................................87.3. 3DPCBBOTTOMVIEW...........................................................................................................................9
8. BILLOFMATERIALS...................................................................................................................109. COMPONENTDATASHEETS......................................................................................................11APPENDIXA:EMB028TFTREV-AMODIFICATIONINSTRUCTIONS.....................................12
DisplaytechLtd. Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-02-17 Release 4 of 13
1. Product Description TheDisplaytechEMB028TFTDEVisadevelopmentboardfortheDisplaytechDT028ATFTTFTdisplaymodule.TheEMB028TFTDEVinterfaceswithanyMicrochipPICtailPlusorDisplayConnectorV1capabledevelopmentboard,suchastheExplorer16,StarterKitI/OExpansionBoard,PIC24FJ256DA210DevelopmentBoard,orGraphicsPICtailPlus3ControllerBoard.
2. External Interfaces TheEMB028TFTDEVsupportsdrivingtheDT028ATFT’sCOGIlitekILI9341TFTcontrollerviaeitheraparallel,serialor16-bitRGBinterface.WhenconnectedtothePICtailPlus™connector,eitherparallelorserialdatamodecanbeselected.WhenconnectedtotheDisplayConnectorV1,the16-bitRGBmodemustbeselected.TheILI9341isconfiguredforeachinterfaceviatheIM[3:0]pins,whichareconnectedtologichighorlogiclowbyswitchS1.Someofthemodesarenotusable.PleaseseetheDT028ATFTDatasheetandthePinConnectionTableformoreinformation.Caution:DonotconnectdevelopmentboardstoboththePICtailPlusandDisplayConnectorV1connectorsatthesametime.
2.1. Display Connector V1 (16-bit RGB) Interface
WhenconnectedtotheDisplayConnectorV1connection(RGBinterface),theILI9341configurationregistersaremanipulatedviaa3-wireSPIinterface(SCL,SDAandCS).The3-wireSPIinterfaceusesa9-bitdatalength.The9thbitindicateswhethertheremaining8-bitsrepresentdataoracommand(D/CX).Becauseofthisrequirement,theMCUmustbeprogrammedtobit-bangthisSPIconnectionastheMicrochipSPIperipheraldoesnotsupporta9-bitSPIinterface.Althoughsimilar,theI2Cportwillnotworkasithasadifferentdataprotocol.TheILI9341hasan18-bitRGBinterface,butallMicrochipgraphicsdevelopmenttoolsoutputa16-bitRGBsignal.This16-bitRGBsignalisconnectedtotheILI934118-bitRGBinterfacebytyingtheMSBsoftheredandblueRGBoutputsignalstotheMSBsofthered
andbluedisplayinputpinstoachievemaximumbrightnessofeachchannel.PleaseseethePIC24FJ256DA210DevelopmentBoardDatasheetformoreinformation.TosetthedisplaydatapinstoRGBmode,pulltheENABLEline(pin14ofdisplay)high.ToconfiguretheILI9341displaydriverforRGBmode,settheregisters0xB0,0xF6and0x3Atotheappropriatevalues.SeetheILI9341Datasheetforavailablesettings.
2.2. PICtail Plus (16-bit Parallel) Interface
TosetthedisplaydatapinstoMCUmode,pulltheENABLEline(pin14ofdisplay)low.Whenusingtheparallelinterface,allILI9341configurationregistersarewrittenorreadviathelowest8bitsoftheparallelinterface(DB7-0).TheILI9341mustbeconfiguredtoaccepta16-bitparalleldatainputviaregister0x3A(seetheILI9341Datasheet).Thereisapotentialconflictbetweenoneofthefourtouchscreenpins(XL)andthetemperaturesensorontheExplorer16board.UseswitchS2tochangetheXLsignaltoanalternatepinifthetemperaturesensorisneeded.SeeAppendixAforinstructionstomodifyarevisionAcircuitboard.
3. Backlight Power Anon-boardCAT4104VLEDdriverpowersthebacklightoftheDT028ATFTandcanbecontrolledviaaPWMsignal(CN1-93[RD0]orCN2-B11[RD0]).SeetheDT028ATFTDatasheetandtheSchematicformoreinformation.Note:Thebacklightpowersupplyrequiresa5VsupplyontheattachedMicrochipdevelopmentboard.PleasepoweryourMicrochipdevelopmentboardfromthe5Vinput.
4. Example Software ExamplesoftwareisavailablefromDisplaytechuponrequest.PleasecontactDisplaytechatsales@displaytech-us.com.
Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 5 of 13
5. Pin Connection Table
DT028ATFT-TS PICtailPlus DisplayConnectorV1
10(FMARK) - -11(VSYNC) - A14(VSYNC)12(HSYNC) - B14(HSYNC)13(DOTCLK) - A13(GCLK)14(ENABLE) - B13(GEN)15(DB17) - A15(GD15)16(DB16) - B15(GD14)17(DB15) 100(PMD15) A16(GD13)18(DB14) 99(PMD14) B19(GD12)19(DB13) 106(PMD13) A20(GD11)20(DB12) 105(PMD12) B20(GD15)21(DB11) 28(PMD11) B16(GD10)22(DB10) 30(PMD10) A17(GD9)23(DB9) 29(PMD9) B17(GD8)24(DB8) 27(PMD8) A21(GD7)25(DB7) 116(PMD7) B21(GD6)26(DB6) 115(PMD6) A22(GD5)27(DB5) 114(PMD5) A18(GD4)28(DB4) 113(PMD4) B18(GD3)29(DB3) 112(PMD3) A19(GD2)30(DB2) 111(PMD2) B22(GD1)31(DB1) 110(PMD1) A23(GD0)32(DB0) 109(PMD0) B23(GD4)33(CS) 104(PMDCS1) B27(RA0)34(WR) 97(PMWR) -
35(RS/SCL) 73(RA6) A28(RD8)36(RD) 98(PMRD) -
37(RESET) 74(RA7) A27(RA5)38(SDO) - -
39(SDI/SDA) 9(GND) B28(RB1)42(YD) 12(AN1) B7(AN18)43(XR) 11(AN0) A7(AN16)44(YU) 13(RB3) B6(RA1)
45(XL) 14(RB4) A6(RA2)101(RD8)
Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 6 of 13
6. Mechanical Drawing
Displaytech Displaytech EMB028TFTDEV Datasheet
Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 7 of 13
7. Printed Circuit Board
7.1. Schematic
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Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 8 of 13
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7.2. 3D PCB Top View !
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Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 9 of 13
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7.3. 3D PCB Bottom View
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