Battery Backup - Intel iSBC 546 Hardware Reference Manual

INSTALLATION
On the iSBC 547 board connectors Jl through J8 are the serial I/O
connectors (see Table 5-5 for pin assignments) .
On the iSBC 546 board connectors Jl through J4 are the serial I/O
connectors (see Table 5-4 for pin assignments). connector J5 is
the printer interface connector (see Table 5-7 for pin assignments
and Table 5-8 for signal descriptions).
3.4.2
BATTERY BACKUP
In order to use the battery backup for the clock/calendar on the
iSBC 546 board the jumper between E30 and E3l must be installed by
the user. In the default condition (as delivered from the factory)
the backup battery is installed but the jumper is not.
3-3