ADD backup battery to STM32F746 DISCO

[egywell]

Posted on October 30, 2017 at 17:19

HELLO

I want to connect backup battery to STM32F746 DISCO but from datasheet I see VBAT is connected directly to VDD 

is there any way to solve this problem ??

[Andrew Neil]

Posted on November 02, 2017 at 13:01

Perhaps you could ask this guy if he'll sell you one of his STM32F746 Break Out Boards:

http://sustburbia.blogspot.co.uk/2015/07/how-ragworm-helped-me-create-stm32f746.html

 

http://sustburbia.blogspot.co.uk/2015/07/first-steps-coding-and-speed-testing.html

[Tesla DeLorean]

Posted on November 02, 2017 at 18:14

I think the multi-layer board, screen and feature richness of the DISCO is something the OP wants but can't afford to replicate.

If the OP wants to productize the DISCO, that's perhaps a conversation to be having with ST, and if the volume is sufficient to rev the board, etc.

[Andrew Neil]

Posted on November 02, 2017 at 18:39

It has Arduino connectors - so maybe just add an Arduino RTC shield ... ?

[LMI2]

Posted on November 02, 2017 at 22:39

I had to check and there is no RTC shield from Arduino, there seems to be one from Adafruit. Adafruit has usually good support and libraries. And the chip uses probably battery as a backup power.

I have one from Waveshare, there is a small problem in it. It uses either battery or supply power. A better way is to have battery for backup power.

[Andrew Neil]

Posted on November 02, 2017 at 23:05

I just meant an RTC

shield

for use with Arduino - not necessarily made by Arduino.

An shield has the advantage that it will simply plug on to the Arduino connectors; eg,

But plenty of other small modules are available; eg,