2.4 Inch 240x320 IPS TFT LCD Module 8-Bit MCU Parallel 4-Line SPI Interface 26 Pin

There is a moment in every small-display project when the schematic gets opened for the last time before tooling, and someone counts the pins left on the microcontroller. It is rarely a comfortable count. The display wants a bus, the keypad wants six lines, the sensor has an interrupt, the radio occupies the serial port, and the debug header has already been sacrificed. Designs do not fail here because the panel was not bright enough; they fail because the panel wanted twenty-two wires and there were nine.

This module is the answer to that particular afternoon. It carries an 8080-style 8-bit MCU interface — eight data lines plus chip select, register select, write and read — and a four-line serial interface, with a single pin deciding which of the two the controller sees. No bridge, no external timing generator, no second voltage rail to sequence. The six questions below are the ones worth answering before the layout is signed off.

The two dialects side by side

Three mistakes that cost a week each

The first is choosing the serial mode on a product that repaints its whole screen. Serial is comfortable for a value that changes once a second; it becomes a visible sweep when the UI swaps pages, and by then the board is in tooling. The second is forgetting that an 8-bit MCU bus is not free: the address window has to be decoded, and on some parts the write strobe needs a wait state configured, which is invisible until the first photographically black screen appears. The third is mechanical, not electrical — a 26-pin tail with a stiffener behaves differently from a bare flex, and a housing that pinched the cable at assembly will fail in the field, not in the lab.

None of these are exotic. All three are cheap to avoid in a design review and expensive to find later, which is the reason this page is written as a set of questions instead of a feature list.

Bring this list to the design review

Where a 2.4-inch numeric panel still wins

Four product families account for most of this panel's volume, and they share one trait: the screen is a readout, not an experience. A benchtop power supply or a signal generator where the interface is a voltage, a current and a limit indicator. A battery or fuel gauge where the only thing that changes is a number and a bar. A heating controller with a set-point and three status icons. A portable tester where the operator glances, reads and moves on. In each case a frame buffer would be dead weight: the host has 32 kilobytes of RAM, and paying for a display engine to avoid using eight wires is the wrong trade.

The cost argument deserves to be stated plainly, because it is usually the real reason a project is looking at this category. Moving to a host with a display engine means a new microcontroller, a new toolchain, a new memory budget and a new validation cycle — months of engineering to save a handful of GPIO. Staying with the 8-bit bus means the existing firmware keeps its structure and the display becomes a peripheral rather than an architecture. On a product where the display is ten percent of the value, that is not a compromise. It is the correct engineering decision, and it is why this interface is still specified in 2026.

What this part is not

There is no RGB bus here, so a design that needs a hardware refresh engine with a big frame buffer should look at our 2.4-inch dual-interface module instead — same glass size, different connectivity. There is no touch layer in the stack and no bonded option on this build. And 240 by 320 is a numeric interface: text, numbers, bars, icons. It is not a panel for photographs or video, and it does not pretend to be.

Two more questions, briefly

A last note on how to read this page. Nothing here is a claim about being the best panel of its size. It is a description of one specific shape of product — eight wires, no frame buffer, 2.35 millimetres, indoor use — and a list of the questions that decide whether that shape fits. If it does, the rest is drawing work. If it does not, the honest answer is a different module, and we will say so before a purchase order exists.

TXW240082B0  ·  TXWEI  ·  Shenzhen, Guangdong, China  ·  RoHS compliant