ST7796S image path
Select the display interface to suit the host bus. The module datasheet supplies the product pinout and timing, while the controller document describes the command set.
3.0"240x400 IPS Capacitive - SPI, MCU, RGB
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3.0"240x400 IPS Capacitive - SPI, MCU, RGB
Sale price$59.00
3.0"240x400 IPS Capacitive - SPI, MCU, RGB
- 💹 Enjoy a 20% discount for orders over 500
- 📉 A 15% discount is available for orders ranging from 200 to 499
- 🎁 A 10% discount is available for orders ranging from 50 to 199
- 🎁 A 5% discount is available when ordering 10-49
Resources & Downloads
DM-TFT30-407
3.0" IPS Capacitive Touch Display · 240 × 400
DM-TFT30-407 integrates a 240 × 400 IPS TFT display with an ST7796S display controller and an FT6336G capacitive touch controller. Its G+F touch assembly supports single-point touch and gestures over I²C. The module has a 38.88 × 64.8 mm active area and measures 45.04 × 77 × 3.85 mm, providing a compact portrait display format for embedded interfaces.
Resolution240 × 400
Touch ICFT6336G
Display ICST7796S
Active area38.88 × 64.8 mm
Click to enlarge
Adapt the image example and touch driver separately
Model-specific example code is available for the ST7796S image path. The FT6336G has a separate I²C connection, reset and interrupt for touch reporting.
HOST SIDEApplication processor
or MCUSelected to support the required display interface
or MCUSelected to support the required display interface
Selected MCU / serial / RGB mode⟶Interface selection + reset
DISPLAY SIDEST7796S240 × 400 image matrix
Touch → host
FT6336G · I²C. Touch acquisition is separate from image transfer.
LED driver → backlight
Provide the specified LED drive independently of the panel logic supply. Include both paths in the power budget.
Functional connection overview for DM-TFT30-407. Use the module pin assignment for the circuit and connector design.
Separate image and touch communication
FT6336G touch path
Touch communicates through I²C. Use 0x38 for 7-bit addressing; the datasheet also lists 0x70 for an 8-bit write address and 0x71 for an 8-bit read address.
Keep address format consistent with the host I²C API. A library that accepts a 7-bit device address should receive 0x38 rather than the write or read address byte.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product model | DM-TFT30-407 |
| Diagonal | 3.0 inch |
| Module dimensions | 45.04 × 77 × 3.85 mm |
| Pixel pitch | 0.162 × 0.162 mm |
| Display colors | 65K / 262K |
| Pixel arrangement | RGB vertical stripe |
| Display interfaces | 8/9/16/18-bit MCU; 3/4-line serial; SPI + 16/18-bit RGB |
| Touch structure | G+F; single point and gestures |
Optical and electrical data
Luminance
300 cd/m² minimum / 350 cd/m² typical
Power and backlight
Panel supply VCC
3.3 V typical; pins 33–34 specified at 2.5–3.3 V
Normal panel current
10 mA typical / 20 mA maximum
LED forward current
60 mA minimum / 80 mA typical
LED forward voltage
3.2 V typical
Optical and environmental details
Contrast ratio
600:1 typical
Response time
35 ms typical
Viewing angles
80° typical, each direction; CR > 10
Color gamut
50% minimum / 55% typical
The optical table specifies a dark-room measurement at 25 ± 2 °C after 15 minutes of warm-up. Use a stable panel supply and a separate constant-current LED driver as described in the backlight section.
Reset timing and firmware resources
Confirm the FPC and supply
Match the module drawing and pin assignment to the board connector. The panel supply and touch-controller supply have separate specifications.
Apply the reset sequence
The display reset specification gives a minimum 10 µs reset pulse. Observe the stated reset recovery and Sleep Out delays before normal display operation.
Validate image and touch together
Use the model-specific example code as an implementation reference, then verify orientation, touch coordinates and gesture handling in the target hardware.
The module lists operating temperature limits of −20 to +70 °C and storage limits of −30 to +80 °C. These assembly limits should govern the product selection, even where the controller document describes a broader component range.
Position the narrow portrait interface
DM-TFT30-407 · geometry overview
45.04 × 77.0 mm
Module outline · schematic view, not to scale
- Module outline
- 45.04 × 77.0 mm
- Module thickness
- 3.85 mm
- Visible area reference
- 38.88 × 64.8 mm active area
Use the dimensioned engineering drawing to position the cover opening and connection space. The illustration separates the image matrix from the physical module envelope.
Open the DM-TFT30-407 engineering drawing →Plan the interface around the format
The narrow portrait format can be evaluated for stacked status information and touch navigation. Match the host bus and touch orientation before developing the final screen flow.
Firmware and supply details
Which address format belongs in the I²C API?
Use 0x38 when the API expects a 7-bit slave address. The 0x70 write and 0x71 read values are address bytes that include the read/write bit.
What does the example code cover?
The linked ST7796S/TM3.0/407 directory is the model-specific display example. The FT6336G touch connection remains a separate I²C implementation with its own reset and interrupt.
What is the panel supply reference?
The DC table gives 3.3 V typical. The pin description specifies 2.5–3.3 V for pins 33–34; use that pin range for connection planning. Consult DisplayModule before using the higher limit listed in the DC table.
Project Support from DisplayModule
DisplayModule provides documentation and engineering assistance for display integration. For DM-TFT30-407, include your display interface, FT6336G I²C addressing and touch orientation when contacting the team.
Discuss your integration
Use technical support for wiring or documentation questions. Include the model number, connection details and a description of the behavior you observe.
Plan samples and production
Standard models are available for sample evaluation. For volume orders or proposed modifications, request a quote with your quantity and requirements. Confirm the model-specific MOQ, schedule and customization feasibility with the team.
About DisplayModule · Contact details and service information
Download Official Datasheets & Resources
Use the DM-TFT30-407 module datasheet for dimensions, connection details and product-specific electrical and optical limits. The controller documents provide the related interface and command reference.