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Hello everyone, today we are going to learn about Wifi Bluetooth

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This lesson is divided into: common Wifi Bluetooth module introduction, Wifi Bluetooth communication bus

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Wifi Bluetooth module is also called wireless card module

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Since about 2014, Apple laptops have moved away from RJ45 cable ports in favor of wireless cards

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This is the wireless card that you can plug in and out

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The black one on top is the antenna,

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and this is the slot for the network card

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The slot is different from the slot in a regular laptop

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Therefore, Apple's Wifi Bluetooth module is not universal and interchangeable with ordinary laptops

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This wireless card has the characteristics of wide range of wireless signal reception,

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strong signal, small heat, stable transmission and so on

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It has a range far beyond that of a typical laptop wireless card

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The early wireless card was this kind of plug and remove,

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the wireless card used in the new model has become a chip welded to the mainboard,

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this can also be called Wifi Bluetooth module, which contains both Wifi function and Bluetooth function

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Now let's look at its bus

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As can be seen from the circuit diagram,

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the Wifi module communicates through the PCIE bus

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PP3V3_WLAN is the power supply for the Wifi module

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Next, there is a wake-up signal for the module, which is the enable signal

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The coupling capacitor is connected through PCIE bus

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A PCIE bus consists of a pair of sending signals and a pair of receiving signals

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There are four PCIE buses and a 100MHz PCIE bus clock

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And the reset signal of Wifi module, as well as the network wake up signal,

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these belong to the working conditions of wireless card

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Bluetooth uses a USB bus

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PP3V3_S4 is the Bluetooth power supply

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Whether it is welded to the mainboard, or the pluggable Wifi Bluetooth module,

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it communicates with the chipset through the PCIE bus and USB bus

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Among them, Wifi communicates through PCIE bus, and Bluetooth communicates through USB bus

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All right, that's it for this lesson