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Terms explanation

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In this video, we mainly look at the terms commonly used in the schematic diagrams

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of iPhones and Android mobile phones

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Common terms meanings of iPhones

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There are many English logos in Apple's drawings,

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and these English logos represent different meanings

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Because the English abbreviation used in the circuit diagram is composed of several English words

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Only take the first letter in the words and splicing it together,

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We must remember these English terms

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Because in the circuit diagram, the lines are marked in English

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The meanings of the signals cannot be understood if we don't know the English terms

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There are about 200 common terms

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This is the first page

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This is the second page

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This is the third page

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This is the fourth page

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Like the touchpad, it will have three English words that all represent touchpad

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Further below are common English meanings in Android circuit diagrams

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It's slightly different from the Apple models, but mostly the same

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For example, ANT means antenna,

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many of the low frequency and intermediate frequency are the same

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But the gravity sensor and the compass English logo are different

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Next, let's go to the schematic diagram to check these English words

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For example, we open the schematic diagram of iPhone 11

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After opening the schematic diagram,

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we can see that there will be many English logos on it

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Based on the terms we learned earlier,

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we can simply understand the meaning of the drawing

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PCIe represents the bus, AP represents the CPU,

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and BI refers to bidirectional communication

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NAND stands for hard disk

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CLKREQ represents a clock request

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The meaning of this signal is the PCIe bus clock request signal from the hard disk to the CPU

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We can look at other signals

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For example, PCIe3 also represents the PCIe bus

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AP is CPU,

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WLAN refers to the WiFi,

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PERST refers to reset signal

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1V2 means 1.2V voltage

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Then this signal represents the reset signal of the PCIe bus from the CPU to Wifi,

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and the voltage is 1.2V

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Let's open the schematic diagram of Xiaomi 10

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After opening it, we can see that there are many English logos on it

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PCIe refers to the bus

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REF refers to the reference,

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CLK represents the clock signal,

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WLAN represents Wifi

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Then this represents the reference clock of the PCIe bus

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Then if we memorize the English terms,

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we can know the meanings of the signal line when we look at the drawings,

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which can help us understand better

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Ok, that's it for this lesson