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Functional Description
provide an early warning to avoid data loss. Because the DS1210S may block the second access, the software should do at least two accesses before relying on the data.
Optionally, the MVME177 provides jumpers that allow the power source of the DS1210S to connect to the VMEbus +5 V STDBY pin or the onboard battery.
The optional power source for the SRAM is a socketed Sanyo CR2430 battery. A small capacitor is provided to allow the battery to be quickly replaced without data loss.
The lifetime of the battery is very dependent on the ambient temperature of the board and the
When a board is stored, if the battery is present, it should be disconnected to prolong battery life. This is especially important at high ambient temperatures. MVME177 boards with battery backup are shipped with the batteries disconnected.
The power leads from the battery are exposed on the solder side of the board, therefore the board should not be placed on a conductive surface or stored in a conductive bag unless the battery is removed.
Note Lithium batteries incorporate inflammable materials such as lithium and organic solvents. If lithium batteries are mistreated or handled incorrectly, they may burst open and ignite, possibly resulting in injury and/or fire. When dealing with lithium batteries, carefully follow the precautions listed below in order to prevent accidents: