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HMT028ATB-C LCD Module User Manual Release Date - Preliminary Draft release Document Name: HMT028ATB-C Page: 1 of 11

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LCD Module User Manual Document Name: HMT028ATB-C Page: 2 of 11

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LCD Module User Manual 1 Basic Specification TOPWAY HMT028ATB-C is a Smart TFT Module with 32bit MCU on board. Its graphics engine provides numbers of outstanding features. It supports preload and pre-design display interface that simplify the host operation and development time. Suitable for industry control, instrumentation, medical electronics, power electric equipment applications. General Specification Screen Size(Diagonal) : Resolution : Color Depth : Pixel Configuration : Display Mode : Viewing Direction : Outline Dimension : Active Area : Backlight : Surface Treatment : Command I/F:...

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LCD Module User Manual Terminal Function UART Interface Terminal (K1) Pin No. Pin Name I/O 1~5 NC -6,7,8 VDD P 9 NC -10 RX I 11 TX O 12 Descriptions No connection, leave open Power supply (5.0 V) No connection, leave open Data Input (eg. to Host MCU’s UART TXD) Data output (eg. to Host MCU’s UART RXD) Request To Send (function as busy BUSY signal) 1:Busy 0:No busy (eg. to Host MCU IO, check before sending data or command>) Ground, (0V) No connection, leave open 13,14,15 VSS P 16~26 NC -Note. *1. User data and commands transfer through this terminal. *2. HOST using command hand shake during...

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LCD Module User Manual 2 Absolute Maximum Ratings Items Power Supply voltage Operating Temperature Storage Temperature Condition No Condensation No Condensation Note: *1. This rating applies to all parts of the module and should not be exceeded. *2. The operating temperature only guarantees operation of the circuit. The contrast, response speed, and the other specification related to electro-optical display quality is determined at the room temperature, TOP=25℃ *3. Ambient temperature when the backlight is lit (reference value) *4. Any Stresses exceeding the Absolute Maximum Ratings may...

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LCD Module User Manual Function Specifications Basic Operation Function Descriptions HMT028ATB-C TML files Picture files ICONS files UART interface Custom Memories Touch Panel VP variables Control and Draw Engine Display files are stored inside FLASH memory area. They are preloaded to HMT028ATB-C for stand alone interface use. Those files are preloaded via USB interface (U-Drive or PC download). All the interface flow and the touch response are based on the preloaded files VP variables memory is inside RAM area, it provides real time access via UART by the HOST or display onto the TFT....

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LCD Module User Manual Quick Start Guide Install TOPWAY Graphics Editor Import pictures 2. design UI flow Connect to host Show 5. real time data Command Descriptions Please refer to “SMART LCD Command Manual ” Document Name: HMT028ATB-C Page: 7 of 1

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LCD Module User Manual Note：The parameter is slightly changed by temperature, driving voltage and materiel. Document Name: HMT028ATB-C Page: 8 of 11

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LCD Module User Manual Note 1: The data are measured after LEDs are turned on for 5 minutes. LCM displays full white. The brightness is the average value of 9 measured spots. Measurement equipment PR-705 (Φ8mm) Measuring condition: - Measuring surroundings: Dark room - Measuring temperature: Ta=25℃. - Adjust operating voltage to get optimum contrast at the center of the display. Measured value at the center point of LCD panel after more than 5 minutes while backlight turning on. Note 2: The luminance uniformity is calculated by using following formula. △Bp = Bp (Min.) / Bp (Max.)×100 (%) Bp...

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LCD Module User Manual 6 Touch panel Design Precautions 1. It should prevent front case touching the touch panel Active Area (A.A.) to prevent abnormal touch. It should left gab (e.g. 0.2~0.3mm) in between. 2. Outer case design should take care about the area outside the A.A. Those areas contain circuit wires which is having different thickness. Touching those areas could deform the ITO film. As a result case the ITO cold be damaged and shorten its lifetime. It is suggested to protect those areas with gasket (between the front case and the touch panel). The suggested figures are B≥0.50mm;...

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LCD Module User Manual 7 Precautions of using LCD Modules Please refer to "LCD-Module-Design-Handling-Precaution.pdf". Document Name: HMT028ATB-C Page: 11 of 11

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