AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 34

• Manufacturer Part Number: AM79C873
• Description: NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
• Manufacturer: Advanced Micro Devices

MII 100BASE-TX Transmit Timing
MII 100BASE-TX Transmit Timing Parameters (Half Duplex)
Note:
1. Typical values are at 25 and are for design aid only; not guaranteed and not subject to production testing.
34
Symbol
tTX
tTX
tTX
tTX
TX_EN, TX_ER
t1
t2
pd
r/f
h
s
TXD [0:3],
TX_CLK
100TX
TXD[0:3], TX_EN, TX_ER Setup To
TX_CLK High
TXD[0:3], TX_EN, TX_ER Hold From
TX_CLK High
TX_EN Sampled To CRS Asserted
TX_EN Sampled To CRS De-asserted
TX_EN Sampled To TPO Out (Tx Latency)
100TX Driver Rise/Fall Time
CRS
tTX
Parameter
s
Figure 7. MII 100BASE-TX Transmit Timing Diagram
t
1
tTX
P R E L I M I N A R Y
pd
Am79C873
90% To 10%, Into
100
Conditions
Differential
tTX
h
tTX
r/f
Min
11
0
3
-
-
-
t
2
(Note 1
Typical
4
4
8
4
-
-
)
Max
5
-
-
-
-
-
22164A-9
Unit
BT
BT
BT
ns
ns
ns