CP6000
Functional Description
ID 27942, Rev. 05
© 2005 Kontron Modular Computers GmbH
Page 2 - 9
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2.05.UG.VC.051020/17275
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P R E L I M I N A R Y
2.2.4
Reset
The CP6000 is automatically reset by a precision voltage monitoring circuit that detects a drop
in voltage below the acceptable operating limit of 4.68 V for the 5 V line and below 3.09 V for
the 3.3 V line, or in the event of a power failure of the DC/DC converter. Other reset sources
include the watchdog timer and the push-button switch on the front panel. The CP6000
responds to any of these sources by initializing local peripherals.
A reset will be generated under the following conditions:
• +5 V supply falls below 4.68 V (typ.)
• +3.3 V supply falls below 3.09 V (typ.)
• Power failure of all onboard DC/DC converters
• Push-button "RESET" pressed
• Watchdog overflow
• CompactPCI backplane PRST input
2.2.5
SMBus Devices
The CP6000 provides a System Management Bus (SMBus) for access to several system
monitoring and configuration functions. The SM Bus consists of a two-wire I²C bus interface.
The following table describes the function and address of every onboard SM Bus device.
Note ...
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 5 - 6
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 expectancy is dependent on the operating temperature and the
standby time (shutdown time) of the system in which it operates.
To ensure that the lifetime of the battery has not been exceeded, it is recom-
mended to exchange the battery after 4 - 5 years.
Table 2-7: SM Bus Device Addresses
DEVICE
SMB ADDRESS
Hardware Monitor LM87
0101110xb
EEPROM 24LC64
1010111xb
Clock
1101001xb
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