STM32F030RCT6 (ARM 32-bit Cortex-M0) RTC battery pin connection

[Govind Raj]

Posted on July 25, 2017 at 06:41

Hello friends, I am using

STM32F030RCT6 (ARM 32-bit Cortex-M0)

in my design. I want to make use of the in-built Real-time clock (RTC) from the Chip. Where should I connect the battery, i.e., between which pin numbers? Can someone help me in this regard? Thanks in advance.

[STOne-32]

Posted on July 25, 2017 at 19:03

Dear

cgovind.raj

‌,

If you have a battery to keep RTC working while main VDD is off, You need to select his cousin STM32F091RC : You will see VBAT pin at position 1 in this LQFP64 package. For value line series F030 we are not selling neither full testing the VBAT mode. It has a smll extra cost $. ☺.

Cheers,

STOne -32

[Tesla DeLorean]

Posted on July 25, 2017 at 23:00

Might well also need an LSE crystal, check what's powered in the low power domain.