Artesyn COMX-CORE Series Installation and Use (August 2014) - Manual (Page 78)

Functional Description
COMX-CORE Series Installation and Use (6806800K11F) 78
4.20 Real-time Clock (RTC)
COMX-CORE Series supports a battery-backed real-time clock. The chipset Ibex Peak-M
contains a Motorola MC146818A-compatible real-time clock with 256 bytes of battery-
backed RAM. The real-time clock performs two key functions: keeping track of the time of day
and storing system data, even when the system is powered down. The RTC operates on a
32.768 KHz crystal and a 3 V battery.
The RTC also supports two lockable memory ranges. By setting bits in the configuration space,
two 8-byte ranges can be locked to read and write accesses. This prevents unauthorized
reading of passwords or other system security information.
The RTC also supports a data alarm that allows for scheduling a wake up event up to 30 days in
advance, rather than just 24 hours in advance.