Detailed powering schematic?


Is there a Hardware-Engineer at SinoVoip who can explain how the powering of the M2+ in detail works? Can we see a schematic ?

We are having problems to hold the device over a long time on its maximum capabilities.

(bpi team) #2

BPI-M2+ SCH have public:


I cannot find DC-Port connection and how it delivers power to H3, can you show me ?

(bpi team) #4


(bpi team) #5


Thank you.

SYSTEM is where the DC-Port (5V, 2A) is connected, right?

What is the name of the Chips: U5 and U6 so I can find Data sheet?


Where is the test point to measure VDD_CPUX please?

(bpi team) #8


(bpi team) #9



red LED on Power Supply 5,16 Volt (measured on the PCB, Pin39 to power-barrel) GND attached to Pin 39

as reference Pin 1 = 3,23 V Pin 2 = 5,13 V

According to the schematic it should be 1,20V but I measure 1,30V ? Can you explain, why my results do not fit with your schematics ?

here are my results in the picture: (direct link to picture)

Website error / wrong information
Possible header configurations and RTC question
Possible header configurations and RTC question

Am also very interested in this mismatch. And there’s another problem. I’ve never seen any of you @sinovoip or Foxconn guys showing a picture of any of your boards with a heatsink on it.

Both M3 and M2+ are prone to heavy overheating. Do you really never test your boards under real world conditions? Do you care about settings like these:


@lionwang @BPI_Justin can one of you read this little thread and advise ?

(bpi team) #13

it is right, it limit from 1.1V to 1.4V, we setting it to 1.3V.

Possible header configurations and RTC question
(Leo Xu) #14

If you don’t care about warranty, you can follow this article. :wink: