dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 115
dp83630sqx
Manufacturer Part Number
dp83630sqx
Description
Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP83630SQX.pdf
(126 pages)
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Part Number:
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T2.21.1
T2.21.2
T2.22.1
Parameter
Parameter
18.2.21 100BASE-TX Signal Detect Timing
Note: The signal amplitude on PMD Input Pair must be TP-PMD compliant.
Note: Fast Link-loss detect is enabled by setting the SD_CNFG[8] register bit to a 1.
18.2.22 100 Mb/s Internal Loopback Timing
Note: Due to the nature of the descrambler function, all 100BASE-TX Loopback modes will cause an initial “dead-time” of up to 550 µs during which time no data
Note: Measurement is made from the first rising edge of TX_CLK after assertion of TX_EN.
will be present at the receive MII outputs. The 100BASE-TX timing specified is based on device delays after the initial 550µs “dead-time”.
SD Internal Turn-on Time
SD Internal Turn-off Time
TX_EN to RX_DV Loopback
Description
Description
100 Mb/s internal loopback mode
Default operation
Fast link-loss indication
enabled
Notes
Notes
115
Min
Min
Typ
250
1.3
Typ
30136243
30136242
Max
300
1
Max
240
www.national.com
Units
Units
ms
µs
µs
ns
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