Thread:CircuitCo talk:RTC Cape/Move to Microchip MCP7940N as RTC?

Moving to the MCP7940N looks to add features the DS1338 does not have. In particular, these features are useful for using the BB in a very low-power capacity. For instance one can use this to wakeup the BB every hour to perform an NTP query but let it sleep in between more significant events.

Here's a migration document: http://ww1.microchip.com/downloads/en/DeviceDoc/20005194A.pdf Here's the datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20005010F.pdf

I do not currently work for Microchip, but I would like an alarm output to wakeup my BBB.

=]