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Inconsistent boots

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Posted at 12/24/2014 02:48:41     

After powering down the device in Android or Ubuntu I notice the next set of power ups (using the PWRKEY) result in failed boots as shown below:


  1. U-Boot 2014.10-RK3288-02 (Dec 19 2014 - 19:50:49)

  2. CPU: rk3288
  3. CPU's clock information:
  4.     arm pll = 600000000HZ
  5.     periph pll = 300000000HZ
  6.     ddr pll = 200000000HZ
  7.     codec pll = 594000000HZ
  8. Board:  Rockchip platform Board
  9. DRAM:  Found dram banks:1
  10. Adding bank:0000000000000000(0000000080000000)
  11. 128 MiB
  12. DDR Version 1.00 20141007
  13. In
  14. Channel a: DDR3 200MHz
  15. Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
  16. Channel b: DDR3 200MHz
  17. Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
  18. DDR Version 1.00 20141007
  19. In
  20. Channel a: DDR3 200MHz
  21. Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
  22. Channel b: DDR3 200MHz
  23. Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
  24. Memory OK
  25. Memory OK
  26. OUT
Copy the code



After a number of random attempts the board does finally boot.
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Posted at 12/24/2014 15:25:35     
Please try a long press of PWR button (>3s) to see if the randomness will go away.
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Posted at 12/25/2014 00:25:17     

Please try a long press of PWR button (>3s) to see if the randomness will go away.




That seems to work.?

Another have question, what the maximum voltage the ADC input pins can take?





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Posted at 12/26/2014 16:19:03     
The maximum voltage the ADC input pins can take is 1.8V .
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