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Title: Inconsistent boots [Print This Page]
Author: jas-rk    Time: 12/24/2014 02:48
Title: Inconsistent boots

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)

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



After a number of random attempts the board does finally boot.
Author: busybee    Time: 12/24/2014 15:25
Please try a long press of PWR button (>3s) to see if the randomness will go away.
Author: jas-rk    Time: 12/25/2014 00:25

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?





Author: busybee    Time: 12/26/2014 16:19
The maximum voltage the ADC input pins can take is 1.8V .
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