Phytec kitCON-161CS, Hardware Manual

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kitCON-161CS/JC/JI
44 
PHYTEC Meßtechnik GmbH 1999 L-356e_2
9 The Battery Buffer
To prevent loss of data in case of sudden power failure the
kitCON-161CS/JC/JI can be equipped with a battery. This battery
buffers the memory devices on U10 and U11. However, this battery
buffer is not otherwise essential to the functioning of the
kitCON-161CS/JC/JI.
Position BT1 on the component side of the module is provided for
mounting a battery type CR2032. As of the pressing of this manual, a
lithium battery is recommended as it offers relatively high capacity at
low self-discharge. In the event of a power failure at VCC, the RAM
memory blocks will be buffered by a connected battery via VBAT.
The current consumption depends on the components populating the
board and memory size. For the standard devices used on the board
the draw is typically 1 µA (max. 100 µA) per RAM-device.
Regarding data and code integrity, please be advised that despite the
battery buffer, changes in the data content within the RAM can occur
given disturbances. The battery-buffer does not completely remove
the danger of data destruction.
Note:
Utilizing the battery buffer for the RAMs the storage temperature
is only 0
°
C to +70
°
C.