KBox A-203-sXAL4 – User Guide Preliminary Rev. 0.2
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When powering on the KBox A-203-sXAL4, make sure that the cooling fins of the chassis
(Figure 9, Figure 10 and Figure 11, pos. 6) are not obstructed (covered) by any objects.
To provide sufficient heat dissipation by the cooling of the device, do not cover the cooling
fins of the KBox A-203-sXAL4. Do not place any objects on the device. When installing the
system, please note the clearance recommendation in the section 6.1 “System Mounting”.
4.1.
RTC
The KBox A-203-sXAL4 comprises a chipset external RTC. This RTC is connected to the SMBus of the processor
module. A RTC of type RV-8564 or compatible is used. To provide a valid date and time when no power is connected to
the KBox A-203-sXAL4, the RTC is equipped with a goldcap buffer.
4.1.1.
RTC Buffer Time
Figure 2: RTC buffer time
If the time is not valid this is indicated by a status bit in the RTC registers. For details see the RV-8564 application
manual.
To get the maximum buffer time it is necessary to have the system a certain time powered
on. This ensures that the buffer capacitors are fully loaded.
The buffer time depends on the ambient temperature and on how long the box is connected
to its power supply.
4.2.
System Expansion Capabilities
The KBox A-203-sXAL4 is available in the configurations described in this manual.
If you are interested in a different, customer-specific configuration, feel free to contact Kontron and ask for your
requirements. Contact information can be found on our web site www.kontron.com.
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