Introduction
The common camera on smartphones is MIPI, and some of the cameras (such as certain hardware that supports DVP interface) are DVP.
MIPI is short for Mobile Industry Processor Interface ( In short, USB stands for Universal Serial Bus, MIPI stands for Mobile Industry Processor Interface, DVP stands for digital video port, and CSI stands for CMOS Sensor Interface.
1.DVP interface
DVP bus PCLK limit of about 96M, and the length of the line can not be too long, the maximum rate of all DVP is best controlled below 72M, PCB layout easier to draw
DVP is a parallel port and requires PCLK, VSYNC, HSYNC, D[0:11] – can be 8/10/12bit data, depending on ISP or baseband support
DVP output part: VSYNC(frame sync signal), HSYNC (line sync signal), PCLK (pixel clock), data line (8-bit or 10-bit) – the original RGB data transmitted
2.MIPI interface
MIPI is a differential serial port transmission, fast speed, anti-interference. Mainstream cell phone modules are now using MIPI transmission.
MIPI camera has three power supplies: VDDIO (IO power), AVDD (analog power), DVDD (kernel digital power), different sensor module camera power supply is different, AVDD has 2.8V or 3.3V; DVDD generally use 1.5V or higher, different manufacturers’ design is different.
Additional note: MIPI camera interface is called CSI, and MIPI display interface is called DSI.
CSI-2 interface specification is released by the MIPI (Mobile Industry Processor Interface) Alliance organization on the camera serial interface.
The MIPI CSI-2 interface uses fewer resources from the CPU – thanks to its multi-core processors. It is the default camera interface for Raspberry Pi and Jetson Nano. The Raspberry Pi camera module V1 and V2 are also based on it.
MIPI is an open standard for mobile application processors initiated by the MIPI Alliance, and the MIPI-CSI-2 protocol is a sub-protocol of the MIPI Alliance protocol, which is specially designed for the interface of the camera chip
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Post time: Nov-15-2022
