Force Computers SYS68K/CPU-40, User Manual

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SYS68K/CPU-40/41 USER'S MANUAL FORCE COMPUTERS
3-24
All combinations of the listed instructions are allowed and possible.
This SRAM can be used to save special settings of the FGA-002 as described in Section 7, Introduction
to VMEPROM of this manual.
The following figure shows the location diagram of Jumperfield B20 for the backup supply. The default
configuration uses the on board battery.
Please note that the Real Time Clock on the CPU board is supplied via the same jumperfield.
B1 B1
+))), +))),
1
*
o
*
Battery is connected to 1
*
o
*
Battery is cut from
*
|
*
Backup Supply Line
* *
Backup Supply Line
*
o
*
(default)
*
o
*
.)))- .)))-
B20 B20
+))), +))),
1
*
o
*
+5VSTDBY is connected to 1
*
o
*
+5VSTDBY is cut from
*
|
*
Backup Supply Line
* *
Backup Supply Line
*
o
* *
o
*
(default)
.)))- .)))-
NOTE
The battery is not installed on the CPU board to avoid damage during shipment.
CAUTION
If the special settings for the FGA-002 which are stored in the SRAM are used, these settings will be
erased when
a) removing the jumper on jumperfield B1 or disassembling the battery
and
b) removing the jumper on jumperfield B20 or removing the board from the VMEbus.