Thông tin atf emmc was not detect (cmd1)

Thảo luận trong 'BOX - TOOL HỔ TRỢ PHẦN MỀM'

  1. nat92vl

    nat92vl Tuấn Gia Đình DONGNAIGSM

    Tham gia ngày:
    Bài viết:
    Đã được thích:
    Giới tính:
    Nghề nghiệp:
    sửa dtdd
    Nơi ở:
    vĩnh long
    mấy anh hướng dẫn em với hic bị lỗi y hệt chỉ scan được mấy ổ xài áp 1v8 với 2v8...ổ nào xài áp 3v3 là k scan được luôn.......
    ERROR: EMMC WAS NOT Detected! (CMD1)--Solution
    2. Connect the Soldered TP Connections to ATF Box
    3. Disconnect the USB Cable and Wait until the
    the ATF Software will tell you to Connect the USB."

    ERROR: EMMC WAS NOT Detected! (CMD1)
    Check your Test Point Soldering!
    CMD1 Reply: 0x00000000

    ADAPTER USED --ATF 4in1 Adapter V2

    Solution --
    1. Check and confirm soldering is perfect. Reduce wire length as low as 5cm

    If you are getting same error --

    2. --

    4 in 1 Adapter --
    <Bạn vui lòng đăng nhập hoặc đăng ký để xem được nội dung này!>


    • Check 1.8V, 2.8V And 3.3V are OK
    • 3.3V may be near 3V only--IF 3.3v is not OK continue --IF OK Please STOP HERE and excuse me

    Why 3.3V is not OK??

    The regulator used is -- AMS117 3.3V
    Datasheet -- Attachment 346792

    • There should be at-least 1.25V difference between Input and output of AMS117 series regulators
    • Its a 5V to 3.3V regulator

    Input for AMS117 3.3V regulator?

    <Bạn vui lòng đăng nhập hoặc đăng ký để xem được nội dung này!>


    • Input of AMS117 - 4.2V
    • Output expected 3.3V But since min. V difference between I/P and O/P is 1.25V, SO , obtained O/P 4.2V-1.25= 2.95V

    So the 3.3V is not getting.
    What to do?

    • Remove AMS117 3.3V regulator
    • Provide 3.3V externally.
    • Set max current 200mA
    • Vcc - 2.8V , Vccq - 3.3V
    Note-- If Box goes OFF when connecting adapter, remove R3 (zero ohm R) near sd-card connector

    Change Vccq to 3.3V in ATF SW . These steps helped me. Hope this will solve the not connecting issue. Try [​IMG]