Embedded PC/RTOS Features 33
3.1.2 I
2
C/SMBus Temperature Sensor
The
MAX6657MSA
can
be
monitored
and
controlled
on
the
SMBus
at
address
0x98
for
the
VMIVME
‐
7807/VME
‐
7807RC.
This
will
allow
the
user
to
monitor
and
set
up
the
two
alarms
available
(ALERT
and
OVERT1).
For
more
information
on
the
Maxim
MAX6657MSA
contact
them
directly
at:
1
‐
888
‐
629
‐
4642,
or
visit
Maxim’s
website
at
www.maxim
‐
ic.com.
3.2 Embedded PCI Functions
The
VMIVME
‐
7807/VME
‐
7807RC
provide
non
‐
volatile
RAM
(NVRAM),
timers
and
a
Watchdog
Timer
via
the
PCI
bus.
These
functions
are
required
for
embedded
and
real
time
applications.
The
PCI
configuration
space
of
these
embedded
functions
is
shown
in
The
“Device
ID”
field
indicates
that
the
device
is
for
VME
products
(00)
and
indicates
the
supported
embedded
feature
set.
The
“Vendor
ID”
and
“Subsystem
Vendor
ID”
fields
indicate
GE’s
PICMG
®
assigned
Vendor
ID
(114A).
The
“Subsystem
ID”
field
indicates
the
model
number
of
the
product
(7807).
Table 3-1 PCI Configuration Space Registers
31
16 15
0 Register Address
Device ID 0004
Vendor ID 114A
00h
Status
Command
04h
Class Code
Revision ID
08h
BIST
Header Type
Latency Timer
Cache Line Size
0Ch
PCI Base Address 0 for Memory-Mapped VME Control registers (BAR0)
10h
PCI Base Address 1 for Memory-Mapped 32 KByte NVRAM (BAR1)
14h
PCI Base Address 2 for Memory Mapped Watchdog and other timers (BAR2)
18h
Reserved
1Ch
Reserved
20h
Reserved
24h
Reserved
28h
Subsystem ID 7807
Subsystem Vendor ID 114A
2Ch
Reserved
30h
Reserved
34h
Reserved
38h
Max_Lat
Min_gnt
Interrupt Pin
Interrupt Line
3Ch