DP83257VF National Semiconductor, DP83257VF Datasheet - Page 32
DP83257VF
Manufacturer Part Number
DP83257VF
Description
IC FDDI LAYER CTRLR 160PQFP
Manufacturer
National Semiconductor
Datasheet
1.DP83256VF.pdf
(144 pages)
Specifications of DP83257VF
Controller Type
physical layer controller
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
160-BFQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Supply
-
Interface
-
Other names
*DP83257VF
Available stocks
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Quantity
Price
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Part Number:
DP83257VF
Manufacturer:
NVIDIA
Quantity:
12 388
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4 0 Modes of Operation
Short Internal Loopback
The Short Internal Loopback mode can be used to test the
functionality of the PLAYER
Clock Recovery function and to test the data paths be-
tween the PLAYER
ring insertion
When in the Short Internal Loopback mode the PLAYER
device performs the following functions
Directs the output data of the Transmitter Block to the
input of the Receiver Block through an internal path
a
device and MACSI devices before
a
device not including the
(Continued)
FIGURE 4-3 Short Internal Loopback
a
32
The level of the Quiet symbols transmitted through the
PMRD
transmitter off level
If both Short Internal Loopback and Long Internal Loopback
modes are selected Long Internal Loopback mode will
have priority over Short Internal Loopback mode This is the
longest loopback path within the PLAYER
See Figure 4-3 Short Internal Loopback
Ignores the PMD Data Indicate pins (PMID
Outputs Quiet symbols through the PMD Data Request
pins (PMRD
g
pins during loopback is automatically set to the
g
)
a
device
g
TL F 11708 – 25
)
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