Datasheet

TX_EN
TX_CLK
COL
T2.17.2T2.17.1
T2.16.1
IDLE
101
PMD Input
Pair
RX_CLK
CRS/CRS_DV
DataSFDPreamble0000
T2.15.3
T2.15.2
T2.15.1
1 0 1 0 1 0 1 0 1 0 1 1
PMD
Input Pair
CRS/CRS_DV
RX_DV
RXD[3:0]
1st SFD bit decoded
DP83620
SNLS339C –JANUARY 2011–REVISED APRIL 2013 www.ti.com
4.19 AC Specifications — 10BASE-T MII Receive Timing (Start of Packet)
Parameter Description Notes Min Typ Max Units
T2.15.1 Carrier Sense Turn On Delay (PMD
630 1000 ns
Input Pair to CRS)
T2.15.2 RX_DV Latency
(1)(2)
10 bits
T2.15.3 Receive Data Latency Measurement shown from SFD 8 bits
(1) 10BASE-T RX_DV Latency is measured from first bit of preamble on the wire to the assertion of RX_DV
(2) 1 bit time = 100 ns in 10 Mb/s mode.
4.20 AC Specifications — 10BASE-T MII Receive Timing (End of Packet)
Parameter Description Notes Min Typ Max Units
T2.16.1 Carrier Sense Turn Off Delay 1.0 µs
4.21 AC Specifications — 10 Mb/s Heartbeat Timing
Parameter Description Notes Min Typ Max Units
T2.17.1 CD Heartbeat Delay All 10 Mb/s modes 1200 ns
T2.17.2 CD Heartbeat Duration All 10 Mb/s modes 1000 ns
22 Electrical Specifications Copyright © 2011–2013, Texas Instruments Incorporated
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