80220 Datasheet, PDF (63/91 Pages) LSI Computer Systems – 100BASE-TX/10BASE-T Ethernet Media Interface Adapter

80220/80221
RECEIVE TIMING CHARACTERISTICS
Refer to Figures 19-23 for Timing Diagrams
SYM
t
31
PARAMETER
Start Of Packet To CRS
Assert Delay
t
End Of Packet To CRS
32
Deassert Delay
LIMIT
MIN TYP MAX
200
200
700
130
240
240
600
UNIT
nS
nS
nS
nS
nS
nS
t
Start Of Packet To
33
RX_DV Assert Delay
t
End Of Packet To
34
RX_DV Deassert Delay
240
nS
3600
nS
280
nS
1000
nS
t₃₇
RX_CLK To RX_DV,
RXD, RX_ER Delay
t₃₈
RX_CLK High Time
t
RX_CLK Low Time
39
t₄₀
SOI Pulse Minimum
Width Required for Idle
Detection
t
Receive Input Jitter
41
t₄₃
PLEDn Delay Time
t₄₄
PLEDn Pulse Width
t
RX_CLK, RXD, CRC,
45
RX_DV, RX_ER Output
Rise and Fall Times
t₄₆
RX_EN Deassert to Rcv
MII Output HI-Z Delay
t
RX_EN Assert to Rcv
47
MII Output Active Delay
-8
8
nS
-80
80
nS
18
20
22
nS
180 200 600
nS
18
20
22
nS
180 200 600
nS
125
200
nS
±3.0 nS pk - pk
±13.5 nS pk -pk
25
mS
80
105
mS
10
nS
40
nS
40
nS
CONDITIONS
100 Mbps, MII
100 Mbps, FBI
10 Mbps
100 Mbps, MII
100 Mbps, FBI
10 Mbps.
Relative To Start Of SOI Pulse
100 Mbps
10 Mbps
100 Mbps
10 Mbps.
Relative To Start Of SOI Pulse
100 Mbps
10 Mbps
100 Mbps
10 Mbps
100 Mbps
10 Mbps
10 Mbps
Measure TPI± from last zero cross
to 0.3V point.
100 Mbps
10 Mbps
PLEDn Programmed for Activity
PLEDn Programmed for Activity
46-633
MD400159/E