Datasheet

9.0 Electrical Specifications (Continued)
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9.4.4 100BASE-TX Transmit Packet Deassertion Timing
Note: Deassertion is determined by measuring the time from the first rising edge of TX_CLK occurring after the deassertion of TX_EN to the first bit of the
“T” code group as output from the TPTD± pins. For Symbol mode, because TX_EN has no meaning, Deassertion is measured from the first rising edge of
TX_CLK occurring after the deassertion of a data nibble on the Transmit MII to the last bit (LSB) of that nibble when it deasserts on the wire. 1 bit time = 10
ns in 100 Mb/s mode.
Parameter Description Notes Min Typ Max Units
T4.4.1 TX_CLK to TPTD+/−
Deassertion
100 Mb/s Normal mode 6.0 bits
100 Mb/s Symbol mode 6.0 bits
TX_CLK
TX_EN
TXD
TPTD+/-
(T/R)DATA IDLE
T4.4.1