Intel
®
EP80579 Integrated Processor with Intel
®
QuickAssist Technology—System Overview
Development Kit User’s Guide
October 2008
24
Order Number: 320067-002US
3.4
SMBus
The Intel
®
EP80579 Development Board provides system management communication
through SMBus connectivity. The SMBus is implemented as a single bus with three
repeaters used for voltage translation, fan out and isolation on the Intel
®
EP80579
Development Board.
Figure 7
shows the block diagram of the SMBus system on the
Intel
®
EP80579 Development Board.
§ §
Figure 7.
SMBus System Block Diagram
E
P
8
0579
IIC
H
VSBY3
_
3
PC
A9
5
1
5
SM
Bu
s
A
Re
p
e
a
te
r
PC
A9
5
1
5
S
M
B
u
s
B
R
e
peat
er
P
C
A
9
515
S
M
B
u
s C
R
epea
te
r
E
P
8
0579
IM
CH
A
ddr
0
x60
C
K
410
A
ddr
0XD
2
D
B
800
A
d
d
r 0xD
C
J
T
AG De
b
u
g
Po
rt
M
ast
er
D
IMM_
0
A
d
dr
0xA
4
D
IMM_
1
A
d
dr
0xA
6
M
e
zz
ai
ne 0
A
d
d
r D
e
te
rm
ined by
C
a
rd
M
e
zz
ai
ne 1
A
d
d
r D
e
te
rm
ined by
C
a
rd
M
e
zz
ai
ne 2
A
d
d
r D
e
te
rm
ined by
C
a
rd
L
E
B
C
onnec
to
r
A
d
d
r D
e
te
rm
ined by
C
a
rd
MEZ
Z_
SMB
*
DIMM
_SM
B*
MC
H_
SMB*
VSBY_
SM
B*
VCC
3
VCC
3
VC
C3
S
M
B
u
s head
er
*
No
te
:
S
M
B
u
s
header
i
s a
1
x3 f
o
r
he
ader
1:
D
A
T
A
2
:G
N
D
3
:C
L
K
*
i
n
N
e
tnam
es
r
e
p
re
sent
s C
L
K
an
d
D
A
T
S
M
Link
[0
]
= C
L
K
an
d
SM
Li
nk
[1
]
= D
A
T
SM
BSC
L
a
n
d
SM
BSDA
f
ro
m
IM
C
H
S
M
B
u
s
h
eader
C
*
S
M
B
u
s
hea
der
B
*
S
M
B
u
s
he
ader
A
*
E
P
8
0579
S
M
Li
nk
A
d
dr
0x
44
S
M
B
u
s head
er
1 D
a
ta
2 G
roun
d
3 C
loc
k
0-
oh
m
VSBY
_
S
M
B
*
L
A
N
cont
ro
lle
r
S
M
Li
nk
*
EN
EN
EN
GP
O
2
3
GP
O
2
1
GP
O
2
0
D
e
faul
t D
isabl
e
D
e
fa
u
lt E
nabl
e
De
fa
u
lt D
is
a
b
le
S
IO
A
d
dr
0
x5C
SDA
SCL
K
SDA
1
SCL
K
1
SDA
2
SCL
K
2
Bo
a
rd
I
D
T
P
M
is
no
t
con
nect
ed
to
SM
Bu
s
S
M
B
u
s heade
r S
IO
1
*
VSB
Y
3
_
3
P
C
I
E
xp x
8
C
onn
(S
lo
t #
1
)
P
C
I
E
xp x
4
C
onn
(S
lo
t #
2
)
P
C
I
E
xp x
4
C
onn
(S
lo
t #
3
)
P
C
I
E
xp x
4
C
onn
(S
lo
t #
4
)
P
C
I
E
x
p x
4
C
onn
(S
lo
t #
5
)
VSBY3
_3
S
M
B
u
s hea
der
S
IO
2
*
0-
ohm
SIO2_SMB*
PC
IE
_S
MB
*
0-
ohm
em
pt
y
0
-ohm
em
p
ty
0-
ohm
SIO1_SMB*
SIO
1_
ID
_S
MB
*
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from