Optional Sram Backup Power Source Select Header J8; Settings For Optional J8 Sram Backup Power Source Select Header - Motorola MVME167 Series Installation Manual

Hardware Preparation and Installation

Optional SRAM Backup Power Source Select Header J8

3
!
Caution
Table 3-6. Settings for Optional J8 SRAM Backup Power Source
Header
Number
J8
3-12
Header J8 is an optional header used to select the SRAM backup
power source on the MVME167, if the optional battery is present.
(The battery backup for SRAM is optionally available, but only as a
factory build and only by special request.)
If your system is equipped with the optional battery
backup, do not remove the jumper from J8. This will
disable the SRAM. If your MVME167 contains optional
header J8, but the optional battery is removed, the
jumper must be installed between pins 2 and 4 to disable
the backup or between pins 1 and 2 for the factory
configuration as shown in
Select Header
Header
Description
SRAM backup
power source
select header
Table 3-6.
ConÞguration
VMEbus +5V STBY
(Factory
conÞguration)
Optional battery
Backup power
disabled
Jumpers
J8
3
4
2
1
J8
3
4
2
1
J8
3
4
2
1