Inconsistent boots

Chip Platform Rockchip
1

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:

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

CPU: rk3288
CPU's clock information:
    arm pll = 600000000HZ
    periph pll = 300000000HZ
    ddr pll = 200000000HZ
    codec pll = 594000000HZ
Board:  Rockchip platform Board
DRAM:  Found dram banks:1
Adding bank:0000000000000000(0000000080000000)
128 MiB
DDR Version 1.00 20141007
In
Channel a: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Channel b: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
DDR Version 1.00 20141007
In
Channel a: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Channel b: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Memory OK
Memory OK
OUT

After a number of random attempts the board does finally boot.

2

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

3

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?

4

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

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