Inconsistent boots

jas-rk

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. 
   
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.

busybee

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

jas-rk

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?

busybee

The maximum voltage the ADC input pins can take is 1.8V .