• Learning center

    Index/
    151. Xiaomi's independent baseband circuit structure
    151. Xiaomi's independent baseband circuit structure
    29 person
    Collection
    Detail
    Comments

    1

    00:00:01,400 --> 00:00:06,900

    This lesson talks about the baseband wcircuit of Xiaomi models with independent baseband

    2

    00:00:07,933 --> 00:00:13,900

    Independent baseband means that the baseband CPU is not included in the big CPU

    3

    00:00:14,733 --> 00:00:20,066

    Xiaomi 10, 10 pro and 12X, these models all have independent basebands

    4

    00:00:24,266 --> 00:00:29,466

    Let's take a look at the working principle of Xiaomi's independent baseband circuit

    5

    00:00:31,300 --> 00:00:36,266

    First, the main power supply provides power to the baseband power supply

    6

    00:00:36,833 --> 00:00:43,266

    After the mobile phone is turned on, the baseband power supply will be turned on by the big CPU

    7

    00:00:43,766 --> 00:00:51,933

    After the baseband power supply works, output S2E, S4E power supply and switching power supply to the baseband CPU

    8

    00:00:53,600 --> 00:01:01,333

    Simultaneously output about 10 channels of LDO type power supply to the baseband CPU, L1E to L14E

    9

    00:01:03,900 --> 00:01:06,566

    Baseband power output sleep clock

    10

    00:01:08,700 --> 00:01:13,500

    After the clock chip works, it will output the main clock of the baseband

    11

    00:01:14,966 --> 00:01:17,933

    After the clock is given to the baseband CPU,

    12

    00:01:17,933 --> 00:01:22,766

    the baseband power supply outputs a reset signal to the baseband CPU

    13

    00:01:23,700 --> 00:01:27,933

    At this time, the baseband CPU gets the command to start working,

    14

    00:01:27,933 --> 00:01:31,666

    and starts to load the baseband system and perform self-test

    15

    00:01:33,200 --> 00:01:38,866

    There is no problem with the self-test, it will output a sustain signal to the baseband power supply,

    16

    00:01:38,866 --> 00:01:44,400

    and the baseband power supply can guarantee the output power supply of this continuous signal

    17

    00:01:45,200 --> 00:01:48,033

    This is the normal boot of the baseband

    18

    00:01:51,900 --> 00:01:57,033

    Baseband circuit power supply, clock, reset, and bus must not fail

    19

    00:01:58,800 --> 00:02:02,966

    Once a fault occurs, it will cause the phone to have no baseband

    20

    00:02:03,533 --> 00:02:08,533

    This is the structure of the baseband circuit of Xiaomi's independent baseband

    21

    00:02:09,233 --> 00:02:11,100

    That's all for this lesson

    No comments yet
    Come and write your comments
    Video
    115. BIOS structure introduction
    ¥0.00
    38 people are learning
    Series of lessons
    LCD backlight screen circuit maintenance
    ¥0.00
    33 people are learning
    Video
    167. Intel 6th~9th Power supplies generation seque
    ¥0.00
    40 people are learning
    Video
    354. I2S bus from baseband to CPU of iPhone 12 12 Pro
    ¥0.00
    37 people are learning
    Video
    192. Network card introduction
    ¥0.00
    82 people are learning
    Next lesson
    Video
    Xinzhizao Download and Install Redemption Code Instructions
    0 people are learning
    Links：