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A
X
6
C
-
L
A
X
6
C
-
L
I
2
C
B
u
s
I
2
C
B
u
s
See SMBus.
P
1
3
9
4
P
1
3
9
4
P1394 (IEEE 1394) is a standard of high-speed serial peripheral bus. Unlike low or medium speed
USB, P1394 supports 50 to 1000Mbit/s and can be used for video camera, disk and LAN.
P
B
S
R
A
M
(
P
i
p
P
B
S
R
A
M
(
P
i
p
For Socket 7 CPU, one burst data read requires four QWord (Quad-word, 4x16 = 64 bits). PBSRAM
only needs one address decoding time and automatically sends the remaining QWords to CPU
according to a predefined sequence. Normally, it is 3-1-1-1, total 6 clocks, which is faster than
asynchronous SRAM. PBSRAM is often used on L2 (level 2) cache of Socket 7 CPU. Slot 1 and
Socket 370 CPU do not need PBSRAM.
P
C
1
0
0
D
I
M
M
P
C
1
0
0
D
I
M
M
SDRAM
DIMM that supports 100MHz CPU
P
C
1
3
3
D
I
M
M
P
C
1
3
3
D
I
M
M
SDRAM
DIMM that supports 133MHz CPU
e
l
i
n
e
d
B
u
r
s
t
S
e
l
i
n
e
d
B
u
r
s
t
S
FSB
FSB
R
A
M
)
R
A
M
)
bus clock.
bus clock.
145
O
n
l
i
n
e
M
a
n
u
O
n
l
i
n
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M
a
n
u
A
a
l
a
l
Open
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