max32 RTCC

Created Thu, 29 Mar 2012 15:14:20 +0000 by akmishra_99

akmishra_99

Thu, 29 Mar 2012 15:14:20 +0000

Hello,

is it possible to provide battery connection to max32 ( PIC32) for keeping RTC up and running even when power to MAX32 is removed, which pin I need to connect battery..?

-Thanks akmishra_99

Ryan K

Thu, 29 Mar 2012 19:41:47 +0000

Hello akmishra_99,

You can connect a battery to the max32. If you remove the jumper for the power select and connect the REG to the + of a battery and GND of ther POWER header to the - of the battery it should work fine. The battery should supply somewhere around 7V to 15V.

Best Regards, Ryan K

akmishra_99

Thu, 29 Mar 2012 20:41:22 +0000

Hello,

I just want to power the RTCC from battery , not the whole max32, is it possible, which pin I need to connect lithium ion battery

-Thanks akmishra_99

Ryan K

Thu, 29 Mar 2012 23:08:02 +0000

Hello akmishra_99,

It looks like you should power the VCC3V3 line, this provides VDD for the PIC32 MCU. I have not tested if this will work though but looking at the schematic on page 2 it seems that it would be the way to go.

http://digilentinc.com/Data/Products/CHIPKIT-MAX32/chipKIT%20Max32_bysa_sch.pdf

If you are looking at power saving too I would suggest looking at section 23 in the data sheet below:

http://ww1.microchip.com/downloads/en/DeviceDoc/PIC32MX_Datasheet_v2_61143B.pdf

Best Regards, Ryan K