3X38FTR Datasheet, PDF (59/64 Pages) Agere Systems – OCTAL-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

Preliminary Data Sheet
September 2000
3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Clock Timing (continued)
Table 43. Transmit Timing
Symbol
t1
t2
Parameter
Transmit Latency (100 Mbits/s)
Transmit Latency (10 Mbits/s)
Sampled TXEN Inactive to End of Frame
(100 Mbits/s)
Sampled TXEN Inactive to End of Frame
(10 Mbits/s)
Min
Max
Unit
6
14
BT
4
10
BT
—
20
BT
—
7
BT
RMCLK
TXEN
TPTX
t1
t2
PREAMBLE
Figure 20. Transmit Timing
Table 44. SMII Timing
Symbol
t1
t2
t3
t4
Parameter
RMCLK Period (±50 ppm)
Output Delay
Setup
Input Hold
Min
Max
8
8
2.0
5
1.5
—
1
—
5-6789(F).a.r2
Unit
ns
ns
ns
ns
t2
t3
t4
t1
1
2
3
4
5
6
7
8
9
10
11
RMCLK
SYNC
Rx
CRS
RXDV RXD0 RXD1 RXD2 RXD3 RXD4 RXD5 RXD6 RXD7
Tx
TXER
TXEN
TXD0
TXD1
TXD2
TXD3
TXD4
TXD5
TXD6
TXD7
Lucent Technologies Inc.
Figure 21. SMII Timing
5-7508(F).ar2
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