32 VMIVME-7807/VME-7807RC Hardware Reference Manual
.
3 • Embedded PC/RTOS Features
GE’s
VMIVME
‐
7807/VME
‐
7807RC
feature
additional
capabilities
beyond
those
of
a
typical
desktop
computer
system.
The
units
provide
four
software
‐
controlled,
general
‐
purpose
timers
along
with
a
programmable
Watchdog
Timer
for
synchronizing
and
controlling
multiple
events
in
embedded
applications.
The
VMIVME
‐
7807/VME
‐
7807RC
also
provide
a
bootable
CompactFlash
system
and
32
KByte
of
non
‐
volatile
RAM.
Also,
the
VMIVME
‐
7807/VME
‐
7807RC
support
an
embedded
intelligent
VME
bridge
to
allow
compatibility
with
the
most
demanding
VME
applications.
These
features
make
the
unit
ideal
for
embedded
applications,
particularly
where
standard
hard
drives
and
floppy
disk
drives
cannot
be
used.
3.1 VME Bridge
In
addition
to
their
desktop
functions,
the
VMIVME
‐
7807/VME
‐
7807RC
have
the
following
VME
features:
3.1.1 Features
•
Complete
six
‐
line
Address
Modifier
(AM
‐
Code)
programmability
•
VME
data
interface
with
separate
hardware
byte/word
swapping
for
master
and
slave
accesses
•
Support
for
VME64
multiplexed
MBLT
64
‐
bit
VME
block
transfers
•
User
‐
configured
interrupter
•
User
‐
configured
interrupt
handler
•
System
Controller
mode
with
programmable
VME
arbiter
(PRI,
SGL
and
RRS
modes
are
supported)
•
VME
BERR
bus
error
timer
(software
programmable)
•
Slave
access
from
the
VME
to
local
RAM
and
mailbox
registers
•
Full
‐
featured
programmable
VME
requester
(ROR,
RWD
and
BCAP
modes
are
supported)
•
System
Controller
auto
detection
•
Complete
VME
master
access
through
five
separate
Protected
‐
mode
mem
‐
ory
windows
The
VMIVME
‐
7807/VME
‐
7807RC
support
High
Throughput
DMA
transfers
of
bytes,
words
and
longwords
in
both
Master
and
Slave
configurations.
If
Endian
conversion
is
not
needed,
GE
offers
a
special
“Bypass”
mode
that
can
be
used
to
further
enhance
throughput
(not
available
for
byte
transfers).
The
VMIVME
‐
7807/VME
‐
7807RC
VME
interfaces
are
provided
by
the
PCI
‐
to
‐
VME
bridge
built
around
the
Tundra
Semiconductor
Corporation
Universe
II
VME
interface
chip.
The
Universe
II
provides
a
reliable
high
‐
performance
64
‐
bit
VME
‐
to
‐
PCI
interface
in
one
design.
The
functions
and
programming
of
the
Universe
‐
based
VME
interface
are
addressed
in
detail
in
a
companion
manual
titled:
GE’s
Tundra
Universe
II
Based
VME
Interface
Product
Manual
(500
‐
000211
‐
000)
.