Embedded Development Board Product Datasheet EMB028TFTDEV · 3. Backlight Power An on-board...

Displaytech Displaytech EMB028TFTDEV Datasheet

Document ID Revision Date Released Status Page SEA_EMB028TFTDEV_SPEC_DS B4 2016-05-18 Release 1 of 13

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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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