Datasheet

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DP83849C
8.2.9 100BASE-TX MII Receive Packet Latency Timing
Note: Carrier Sense On Delay is determined by measuring the time from the first bit of the “J” code group to the assertion
of Carrier Sense.
Note: 1 bit time = 10 ns in 100 Mb/s mode
Note: PMD Input Pair voltage amplitude is greater than the Signal Detect Turn-On Threshold Value.
8.2.10 100BASE-TX MII Receive Packet Deassertion Timing
Note: Carrier Sense Off Delay is determined by measuring the time from the first bit of the “T” code group to the deasser-
tion of Carrier Sense.
Note: 1 bit time = 10 ns in 100 Mb/s mode
Parameter Description Notes Min Typ Max Units
T2.9.1 Carrier Sense ON Delay 100BASE-TX mode 20 bits
T2.9.2 Receive Data Latency 100BASE-TX mode 24 bits
Parameter Description Notes Min Typ Max Units
T2.10.1 Carrier Sense OFF Delay 100BASE-TX mode 24 bits
CRS
RXD[3:0]
PMD Input Pair
RX_DV
RX_ER
IDLE
Data
T2.9.1
T2.9.2
(J/K)
CRS
T2.10.1
PMD Input Pair
DATA
IDLE
(T/R)