Firebeetle 32e Simultaneous USB and VCC power

userHead embeddedprogrammer 2022-08-18 01:56:49 799 Views4 Replies

I am using a Firebeetle 32E in a project and am providing regulated 5v to VCC and it is working fine.   My application does not use a battery.   The USB is normally disconnected.


Occasionally I need to update the firmware by programming the board using the USB connection.  What I am doing now is disconnecting the 5V VCC power first to avoid damaging the board.  Is this necessary or is there protection circuitry to prevent damage when simultaneously powering the board from Both USB and 5V VCC?


Thanks in advance.

2022-09-16 15:19:23

Because of the diode protection, the circuit will not burn out under the condition of power supply at the same time.

userHeadPic jenna
embeddedprogrammer wrote:

Thanks.  That was my hope.

2022-09-22 03:14:45
1 Replies
2022-09-12 19:22:33

???  Does DFRobot monitor this forum?

userHeadPic embeddedprogrammer
2022-08-20 23:26:27

Here is a picture of my setup simplified:


userHeadPic embeddedprogrammer