40 VMIVME-7807/VME-7807RC Hardware Reference Manual
.
3.4.2 WDT Keepalive Register (WKPA)
When
enabled,
the
Watchdog
Timer
is
prevented
from
resetting
the
system
by
writing
to
the
WDT
Keepalive
Register
(WKPA)
located
at
offset
0x0C
from
the
address
in
BAR2
within
the
selected
timeout
period.
The
data
written
to
this
location
is
irrelevant.
3.5 NVRAM
The
VMIVME
‐
7807/VME
‐
7807RC
provide
32
KByte
of
non
‐
volatile
RAM.
This
memory
is
mapped
in
32
Kbytes
of
address
space
starting
at
the
address
in
BAR1.
This
memory
is
available
at
any
time
and
supports
byte,
short
word
and
long
word
accesses
from
the
PCI
bus.
The
contents
of
this
memory
are
retained
when
the
power
to
the
board
is
removed.