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This lesson talks about the working conditions of the cameras of different brands of mobile phones

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Mainly look at Xiaomi 12 models, OPPO R15 models and Huawei nova 7Pro models

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Open the circuit diagram

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Search for CAMER or CAM in the circuit diagram, you can find the relevant circuit of the camera

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First look at the OPPO R15 model

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This is the rear camera, it is divided into left and right

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This is the camera circuit on the right

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Let's see one of them

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The connector for the rear camera is CN2601

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Let's look at its power supply

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This is a 1.8-volt power supply, this is also a 1.8-volt power supply,

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and this is a 1.05-volt power supply

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There are three power supplies

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Let's look at its clock signal

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MCLK is the clock of the camera

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The tenth pin is the reset signal of the camera

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Pins 11 and 12 are I2C buses

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D0, D1, CLKN, CLKP are all MIPI buses

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There are three pairs of buses here, and two pairs of buses on the right,

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a total of 5 pairs, that is, 10 wires

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There are also two focusing 2.8 volt power supplies, and a 2.8 volt analog power supply

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This is the camera circuit of OPPO mobile phone

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Let's take a look at the camera circuit of Xiaomi mobile phone

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Open the schematic and find its wide-angle camera

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We can see its power supply, there are 1.1 volts power supply, and 3.1 volts power supply

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There is also a 3.1 volts power supply for optical image stabilization,

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as well as a 2.9 volts power supply and a 1.8 volts power supply

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There are 5 power supplies in total

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This is its clock signal

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This is its reset signal

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Its I2C control bus is at this location

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Optical image stabilization has three control lines

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The rest is its CSI data transfer bus

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This is the rear camera circuit of Xiaomi 12

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Let's take a look at the camera circuit of Huawei nova 7Pro

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Open the circuit diagram and search for CAM

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You can find the rear camera, the rear camera is the main camera

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First look at its power supply

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Its power supply is 1.2 volts, 1.8 volts

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There is a 2.95 volts focus power supply on the right, and AF is automatic focus

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There are also 2.8V and 1.8V analog power supplies

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This is its power supply

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The clock of the camera circuit is at pin 23 of the connector

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ISP_CLK0 is the clock signal of the camera

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The reset signal is here, RST_N

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ISP_SCL and ISP_SDA are its I2C bus

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CPHY is a communication protocol bus, which transmits the image signal of the camera

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The XVS signal is actually a synchronous signal

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This is how the rear camera circuits of the three phones are described in the drawings

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That's all for this lesson