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HMT068BTA-C

HMT068BTA-C

Product catalog summary

Overview: This document is a technical manual for the TOPWAY HMT068BTA-C Smart TFT Module and the SMART LCD Command Protocol V5.04. It provides detailed specifications, handling instructions, and command structures for interacting with the module.

Basic Specifications:
The TOPWAY HMT068BTA-C features a 6.8” screen with a resolution of 1366(RGB) x 480, supporting 65k colors. It operates within a temperature range of -20 to +70°C, making it suitable for industrial and medical applications. The module includes UART and USB interfaces for data transfer and file preloading.

Terminal Function:
The UART interface is used for data transfer, while the USB interface is for preloading files. The USB should not be connected when the UART power supply is active.

Absolute Maximum Ratings:
The module's power supply voltage ranges from -0.3 to 28V, with specific operating and storage temperature limits. Exceeding these ratings may cause damage.

Electrical Characteristics:
Operating voltage is between 6 to 26V with a typical current of 330mA. The UART interface supports specific voltage levels for data input and output.

Function Specifications:
The module supports preloaded TML, picture, and icon files in FLASH memory, allowing real-time access to VP variables via UART.

Optical Characteristics:
Features a contrast ratio of 400 to 500 and a luminance of 400 cd/m². Viewing angles and response times are specified.

Design and Handling Precautions:
Includes guidelines to avoid damage, such as not applying pressure on the LCD, avoiding static electricity, and ensuring proper storage and handling.

Mounting Instructions:
Detailed instructions for CTP, RTP, and surface mounting, emphasizing the importance of maintaining specific gaps and using support brackets to prevent damage.

Warranty:
The product is guaranteed to perform according to specifications, with limitations on liability for defects arising from additional manufacturing or external forces.

Command Structure:
The SMART LCD uses a serial UART interface with a specific packet structure for communication. Commands include configuration, display control, and VP functions, each with detailed execution instructions.

Key Command Sections:

Flash Memory Commands: For reading and writing data to flash memory.
RTC Commands: For managing the Real-Time Clock settings.
USB Drive Commands: For formatting and unlocking the USB drive.
Display Control Commands: For managing display settings and colors.
VP Function Commands: For handling data in various VP addresses.
System Register Commands: For reading and writing system registers.

Communication Packet Structure:
All commands and responses are encapsulated in a packet structure with specific headers and tails to ensure data integrity.

Important Notes:
Emphasizes the necessity of adhering to command structures and guidelines to ensure proper execution and data integrity.

Catalog excerpts

HMT068BTA-C LCD Module User Manual Release Date - Preliminary release -Update section 3.1 www.topwaydisplay.com www.topwaysz.com Document Name: HMT068BTA-C-Manual-Rev0.3.doc Page: 1 of 13

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LCD Module User Manual www.topwaydisplay.com www.topwaysz.com Document Name: HMT068BTA-C-Manual-Rev0.3.doc Page: 2 of 13

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LCD Module User Manual 1. Basic Specification TOPWAY HMT068BTA-C is a Smart TFT Module with 32bit MCU on board. Its graphics engine provides numbers of outstanding features. It supports TOPWAY TML 3.0 for 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...

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LCD Module User Manual Terminal Function UART Interface Terminal (K1) Descriptions Power supply Request To Send (function as busy BUSY signal) 1：Busy；0：No busy Data output Data Input Ground, (0V) Note. *1. User data and commands transfer through this terminal *2. HW hand shake is suggested Power supply USB DATA negative signal USB DATA positive signal USB_ID,1:Client,0:HOST Ground, (0V) Note. *1. TML files and image files preload through this terminal. *2. Do NOT connect USB terminal ,while VDD(K1) is present. www.topwaydisplay.com www.topwaysz.com Document Name: HMT068BTA-C-Manual-Rev0.3.doc...

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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 cause...

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LCD Module User Manual Basic Operation Function Descriptions TML files Picture files ICONS files UART interface Custom Memories touch panel Control and Draw Engine TML files, Picture files, ICON files are stored inside FLASH memory area. They are preloaded to HMT068BTA-C for stand alone interface use. Those files are preloaded via USB interface as an USB drive. All the interface flow and the touch response are based on the preloaded TML files VP variables memory is inside RAM area, it provides real time access via UART by the HOST or display onto the TFT by TML file. Custom Memories are inside...

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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 5. Command Descriptions Please refer to “SMART LCD Command Manual” . www.topwaydisplay.com www.topwaysz.com Document Name: HMT068BTA-C-Manual-Rev0.3.doc Page: 7 of 1

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LCD Module User Manual 6. Optical Characteristics Item View Angles Contrast Ratio Response Time TOFF White Blue Uniformity NTSC Luminance 1.IF= 200 mA,and the ambient temperature is 25℃. 2. The test systems refer to Note 1 and Note 2. www.topwaydisplay.com www.topwaysz.com

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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 SR-3A (1° ) Measuring condition: - Measuring surroundings: Dark room - Measuring temperature: Ta=25℃. - Adjust operating voltage to get optimum contrast at the center of the display. Note 3: The definition of contrast ratio (Test LCM using SR-3A (1° )): Luminance When LCD is at “White” state Contrast = Ratio(CR) Luminance When LCD is at “Black” state (Contrast Ratio is measured in optimum common electrode...

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LCD Module User Manual 7. LCD Module Design and Handling Precautions Please ensure V0, VCOM is adjustable, to enable LCD module get the best contrast ratio under different temperatures, view angles and positions. Normally display quality should be judged under the best contrast ratio within viewable area. Unexpected display pattern may com out under abnormal contrast ratio. Never operate the LCD module exceed the absolute maximum ratings. Never apply signal to the LCD module without power supply. Keep signal line as short as possible to reduce external noise interference. IC chip (e.g. TAB or...

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LCD Module User Manual dropping from high place) will damage the LCD module. Protective film is attached on LCD screen. Be careful when peeling off this protective film, since static electricity may be generated. Polarizer on LCD gets scratched easily. If possible, do not remove LCD protective film until the last step of installation. When peeling off protective film from LCD, static charge may cause abnormal display pattern. The symptom is normal, and it will turn back to normal in a short while. LCD panel has sharp edges, please handle with care. Never attempt to disassemble or rework LCD module....

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LCD Module User Manual 8.3 Additional Cover Lens Mounting (Figure 3) - For the case of additional cover Lens mounting, it is necessary to recheck with the CTP specification about the material and thickness to ensure the functionality. - It should keep a 0.2~0.3mm gap between the cover lens and the CTP surface.. - The cover lens window should be bigger than the active area of the CTP.It should be≥0.5mm each side. - It is recommended to provide an additional support bracket for backside support when necessary (e.g. slim type TFT module without mounding structure). They should only provide appropriate...

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LCD Module User Manual In general design, RTP V.A. should be bigger than the TFT V.A. and RTP A.A. should be bigger than the TFT A.A. (Figure 5) 通常设计时： RTP 的可视区 V.A. 应不小于 TFT 的可视区 V.A. 及 RTP 的动作区 A.A. 应不小于 TFT 的动作区 A.A. (附图 5) Warranty This product has been manufactured to our company’s specifications as a part for use in your company’s general electronic products. It is guaranteed to perform according to delivery specifications. For any other use apart from general electronic equipment, we cannot take responsibility if the product is used in medical devices, nuclear power control equipment,...

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HMT068BTA-C

HMT068BTA-C

Catalog excerpts

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