ADLINK aTCA-6155 - Manual (Page 31)

Functional Description 17
aTCA-6155
3.2 Peripherals
The following standard peripherals are available on the
aTCA-6155 blade:
Timer
The aTCA-6155 is equipped with the following timers:
X Real-Time Clock: The ICH10R contains a real-time clock
that performs timekeeping functions and includes 256 bytes
of general purpose battery-backed CMOS RAM. Features
include an alarm function, programmable periodic interrupt
and a 100-year calendar. All battery-backed CMOS RAM
data remains stored in an additional EEPROM. This pre-
vents data loss in case the aTCA-6155 is operated without
battery.
X Counter/Timer: Three 8254-style counter/timers are
included on the aTCA-6155 as defined for the PC/AT (Sys-
tem Timer, Refresh Request, Speaker Tone Output).
X High Precision Event Timers (HPET): In addition to the
three 8254-style counters, the ICH10R includes three High
Precision Event Timers (HPET) that may be used by the
operating system. They can be used in one-shot and peri-
odic modes to generate an interrupt when the counter
reaches a pre-programmed value.
Watchdog Timer
The aTCA-6155 provides a Watchdog Timer that is programmable
for a timeout period ranging from 1 to 255 minutes, or 1 to 255
seconds. Please refer to “Watchdog Timer” on page 59 for a
detailed programming guide.