Xycom XVME-956 Series Manual page 84

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5.5.2 Battery Connection
One battery will protect the contents of SRAM memory. A second battery will provide additional
security as on-board circuitry automatically selects the battery with the highest voltage as the source for
backup current. External batteries are connected at J4 (BAT1) and J5 (BAT2). Table 5-17 summarizes
the function of each pin in connectors J4 and J5. I f SRAMs on the module unit are to be made non-
volatile with the batteries, see Section 5.4.2.
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Table 5-17. Backup Battery Connectors (J4 and J5)
PIN
J4-1 Backup Battery 1 (3.6 VDC)
Key (no connection
J4-2
J4-3 Backup Battery 1 (3.6 VDC)
J4-4 Ground
J5-1 Backup Battery 1 (3.6 VDC)
Key (no connection)
J5-2
J5-3 Backup Battery 1 (3.6 VDC)
J5-4 Ground
FUNCTION
XVME-956 Manual
August 1994
5-15