GD82551ER S L66X Intel, GD82551ER S L66X Datasheet - Page 30
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GD82551ER S L66X
Manufacturer Part Number
GD82551ER S L66X
Description
Manufacturer
Intel
Datasheet
1.GD82551ER_S_L66X.pdf
(104 pages)
Specifications of GD82551ER S L66X
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Industrial
Package Type
BGA
Mounting
Surface Mount
Pin Count
196
Lead Free Status / Rohs Status
Not Compliant
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82551ER — Networking Silicon
5.2.1.2
22
Figure 7. Memory Read Burst Cycle
Figure 8. Memory Write Burst Cycle
Note: The 82551ER detects a system error for any parity error during an address phase, whether or not it
is involved in the current transaction.
Bus Master Operation
As a PCI Bus Master, the 82551ER initiates memory cycles to fetch data for transmission or
deposit received data and to access the memory resident control structures. The 82551ER performs
zero wait state burst read and write cycles to the host main memory.
memory read and write burst cycles. For bus master cycles, the 82551ER is the initiator and the
host main memory (or the PCI host bridge, depending on the configuration of the system) is the
target.
The CPU provides the 82551ER with action commands and pointers to the data buffers that reside
in host main memory. The 82551ER independently manages these structures and initiates burst
memory cycles to transfer data to and from them. The 82551ER uses the Memory Read Multiple
(MR Multiple) command for burst accesses to data buffers and the Memory Read Line (MR Line)
CLK
FRAME#
AD
C/BE#
IRDY#
TRDY#
DEVSEL#
CLK
FRAME#
AD
C/BE#
IRDY#
TRDY#
DEVSEL#
1
1
MW
MR
ADDR
ADDR
2
2
3
3
DATA
DATA
BE#
BE#
4
4
DATA
DATA
5
5
DATA
DATA
6
6
DATA
DATA
BE#
BE#
7
7
Figure 7
DATA
DATA
8
8
and
9
9
Figure 8
10
10
Datasheet
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