CP302
Functional Description and Configuration
ID 21112, Rev. 05
Page 2 - 10
®
PEP Modular Computers GmbH
2.5.3
Reset
The CP302 is automatically reset by a precision voltage monitoring circuit that detects a
drop in voltage below the acceptable operating limit of 4.725 V for the 5V line and below
3.0V for the 3.3V line, or in the event of a power failure of the DC/DC converter. Other
reset sources include the watchdog timer and local push-button switch. The CP302
responds to any of these sources by initializing local peripherals and issuing the
PCIRST* signal on the CompactPCI bus.
The CP302 has a variety of reset options:
•
Front panel push button
•
Watchdog
•
Backplane reset (PRST input)
•
Power control (5V, 3.3V and CPU core voltage)
!
Important
•
Care must be taken to ensure that the battery is correctly
replaced.
•
The battery should be replaced only with an identical or
equivalent type recommended by the manufacturer.
•
Dispose of used batteries according to the manufacturer’s
instructions.
•
The typical life expectancy of a 170 mAh battery (VARTA
CR2025) is 4 - 5 years with an average on-time of 8 hours per
working day at an operating temperature of 30°C. However,
this typical value varies considerably because the life expect-
ancy is dependent on the operating temperature and the
standby time (shutdown time) of the system in which it oper-
ates.
To ensure that the lifetime of the battery has not been exceeded
it is recommended to exchange the battery after 3 - 4 years.
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