What is MIPI Cable?
MIPI (Mobile Industry Processor Interface) is an alliance formed by ARM, Nokia, St, TI and other companies in 2003 to standardize the internal interfaces of Mobile phones, such as camera, display Interface, RF/baseband Interface, etc. , thus reducing the complexity of mobile phone design and increasing design flexibility.
There are different workgroups under the MIPI consortium, each defining a set of standards for the phone’s internal interface, such as the CSI camera interface
Display the connection-DSI
And so on
The advantage of the unified interface standard is that handset manufacturers can flexibly choose different chips and modules from the market according to their needs, making it faster and more convenient to change their designs and functions. The following diagram shows the internal architecture of the next generation of smart phones according to the MIPI.
what is MIPI DSI Hierarchical Structure？
PHY defines the transmission medium, input/output circuits, and clock and signal mechanisms.
Lane Management layer: send and collect data flows to each Lane.
Low Level Protocol layer: defines how frames are organized and parsed, error detection, and so on. Application Layer: describes high-level encoding and parsing of data streams.
What are the advantages of MIPI Cable?
MIPI interface module, compared with parallel port, has the advantages of high speed, large amount of data transmission, low power consumption and good anti-interference. For example, an 8M module with both MIPI and parallel port transmission, 8-bit parallel port transmission, need at least 11 transmission lines, up to 96M output clock, to achieve 12FPS full-pixel output; Using the MIPI interface only requires two channels and six transmission lines to achieve a frame rate of 12FPS at full pixels, and the current consumption will be about 20MA lower than parallel port transmission. Since the MIPI is transmitted by differential signal, it is necessary to carry out strict design according to the general rules of differential design, and the key is to realize the matching of differential impedance, the differential impedance of transmission line is 80-125 ohms according to MIPI protocol.
MIPI DSI-compatible Peripherals Support Command or Video mode of operation, with
Which mode is determined by the architecture of the peripheral
The Command pattern is used to send commands and data to a controller with a display cache. The host controls peripherals indirectly through commands. The Command mode has a two-way interface.
Video mode refers to the real-pixel stream when transmitted from the host to the peripheral. This mode can only be transmitted at high speed. To reduce complexity and cost, a Video-only system may have only a one-way data path
As can be seen from the pin definition diagram, D-PHY describes a source synchronization, high-speed, low-power, low-cost physical interface.
Its configuration includes: a clock channel, one or more data channels.
There are three main channel types: one-way clock channel, one-way data channel, and two-way data channel.
Low power signal mode for control purposes: 10 Mbps (Max) .
High-speed signaling mode for fast data traffic: 80MBPS ~ 1Gbps per channel.
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