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DM9801
1M Home Phoneline Network Physical Layer Single Chip Transceiver
Preliminary
53
Version: DM9801-DS-P02
March 20, 2000
MII-1M Nibble Transmit Timing Diagram
TX_CLK
tTX
h
t2
tTX
S
t1
tTX
pd
TXD [0:3],
TX_EN, TX_ER
CRS
HN+/-
MII-1M Nibble Transmit Timing Parameters
Symbol
Parameter
Min.
Typ.
Max.
Unit
Conditions
tTXs
TXD[0:3], TX_EN, TX_ER Setup
To TX_CLK High
10
ns
tTXh
TXD[0:3], TX_EN, TX_ER Hold
From TX_CLK High
10
ns
t1
TX_EN Sampled To CRS
Asserted
1.3
us
t2
TX_EN Sampled To CRS De-
asserted
36.1
us
tTXpd
TX_EN Sampled To HN+/- Out
(Tx Latency)
1.3
us
MII-1M Receive Nibble Timing Diagram
RX_CLK
t2
t1
tTX
pd
RXD [0:3],
RX_DV, RX_ER
CRS
HN+/-
tRX
S
tRX
h
t4
t3