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FIGURE 1. The MIPI Alliance has defined a plethora of interfaces for use in mobile devices. This article focuses on the Display Serial Interface (DSI) shown in the upper left corner.

The MIPI Alliance is a consortium of mobile device manufacturers and electronics components vendors that was established in 2003 to specify a common set of interfaces for various sub-systems within smartphones and similar multimedia devices. They have published a range of standards covering interfaces to audio, camera, display, touchscreen and other devices as shown in their infographic (Figure 1).

FIGURE 5. Data is sent in the form of short fixed-length packets or long variable-length packets in both HS and LP modes. Data is sent LSB first. The Data ID byte indicates the type of packet and the format of the data it contains.

Data transmissions, whether transmitted in HS or LP mode use the same packet format and are sent LSB first. Data can be sent in short 32-bit packets or long variable length packets as shown in Figure 5. Each packet begins with a Data ID byte which indicates the type of packet and contents. Table 1 below lists the possible Data ID values and the type of packet they represent. Not all devices will respond to all Data ID values. Packets are ignored by devices that do not support any particular ID.

There is a lot more to the MIPI DSI interface that we don’t have space for here. This overview has hopefully given you a flavour for this interesting interface. It is a lot more complex than the classic parallel RGB plus clock and sync signals, but it requires a lot fewer pins and is capable of much higher bandwidth and therefore driving larger, high resolution displays.

MIPI Alliance offers a comprehensive portfolio of specifications to interface chipsets and peripherals in mobile-connected devices. The specifications can be applied to interconnect a full range of components—from the modem, antenna and application processor to the camera, display, sensors and other peripherals. Manufacturers use the specifications to optimize performance, simplify the design process, reduce development costs, create economies of scale for their designs, and shorten time-to-market for their products.

MIPI Alliance specifications serve six types of interface needs in a device: physical layer, multimedia, chip-to-chip/interprocessor communications (IPC), device control and data management, system debugging, and software integration.

MIPI Alliance offers its specifications as individual interfaces, enabling companies to use those that suit their own particular needs. Vendors can apply the interfaces with their own high-level features to provide added value or differentiate their products.

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If your applications are directly connected to a PC, a cellphone, or Raspberry Pi, and you have enough space to insert a board to input video, Panox Display can provide customized Controller/Driver boards with input connections for VGA, HDMI, DVI, DP, Type-C video input, MIPI, RGB, LVDS, and eDP.

WF50DTYA3MNN0 is a portrait mode 5 inch IPS TFT-LCD display module, resolution 720 x1280 pixels. This 5 inch TFT-LCD module supports MIPI DSI interface and is featured with an IPS panel which has the advantages of a wider viewing angle of Left:80 / Right:80 / Up:80 / Down:80 degree (typical) and having HD resolution, contrast ratio 800 (typical value). It can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃. This 5 inch MIPI LCD Display Panel has module dimension of 66.10 x 120.4 mm and AA size of 62.1 x 110.4 mm; it integrated driver IC ILI9881C on the module, power supply for analog range 2.5v to 3.6v.