How long the RTC works with battery ,without power supply

nanuradha · ‎2006-09-26

Posted on September 26, 2006 at 09:29

nanuradha · ‎2011-05-17

Posted on May 17, 2011 at 09:32

What is the type of battery to be used and what is the voltage of the bty.

Why there are two options for VDDQ from 2.7 to 3.3v,3.3 to 3.6v.What is the advantage for each option.please if anyone already sarted working give me the reply.

regards

Anuradha. :(

[ This message was edited by: anuradha on 26-09-2006 06:28 ]

kais · ‎2011-05-17

Posted on May 17, 2011 at 09:32

Hello anuradha,

Concerning the battery type it is a simple 3V button battery.

Relating to VDDQ value range it is not an option: It depends on the power supply voltage in which the I/O ring operates(from 2.7V to 3.6V) to determine the VDDQ LVD Threshold.

Regards,

Eris