ATTiny80-20PU (avrdude Invalid device signature 0xffffff)

Discussion in 'Embedded Systems and Microcontrollers' started by beic, Jul 1, 2016.

  1. beic

    Thread Starter New Member

    Jun 13, 2016
    8
    0
    Hi there,

    I ordered from ALiExpress 5pcs of ATTiny85-20PU and none of them are working.

    Error message apears while recognising the MCUs ID: Invalid device signature 0xffffff

    I got this message from avrdude using USBtiny programmer (CMD output).

    Code (Text):
    1. avrdude -c usbtiny -p t85 -F
    2.  
    3. avrdude: AVR device initialized and ready to accept instructions
    4.  
    5. Reading | ################################################## | 100% 0.02s
    6.  
    7. avrdude: Device signature = 0xffffff (retrying)
    8.  
    9. Reading | ################################################## | 100% 0.02s
    10.  
    11. avrdude: Device signature = 0xffffff (retrying)
    12.  
    13. Reading | ################################################## | 100% 0.02s
    14.  
    15. avrdude: Device signature = 0xffffff
    16. avrdude: Yikes!  Invalid device signature.
    17. avrdude: Expected signature for ATtiny85 is 1E 93 0B
    18.  
    19. avrdude: safemode: Fuses OK (E:FF, H:DF, L:62)
    20.  
    21. avrdude done.  Thank you.
    Just to mention, there are no wires, cables or breadboard laying around.

    And I tested my old MCU and it's working fine.

    p.s. And sorry for the wrong title! :(
     
  2. dannyf

    Well-Known Member

    Sep 13, 2015
    1,835
    367
    That's very nice and helpful.
     
  3. beic

    Thread Starter New Member

    Jun 13, 2016
    8
    0
    Your comment was really helpful too! ;)
     
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