80220 Datasheet, PDF (68/91 Pages) LSI Computer Systems – 100BASE-TX/10BASE-T Ethernet Media Interface Adapter

80220/80221
COLLISION AND JAM TIMING CHARACTERISTICS
Refer to Figures 24-27 for Timing Diagrams
SYM
t
51
t
52
t₅₃
t
54
t
55
t₅₆
t₅₇
t
58
t₅₉
PARAMETER
Rcv Packet Start to
COL Assert Time
Rcv Packet Stop to
COL Deassert Time
Xmt Packet Start to
COL Assert Time
Xmt Packet Stop to
COL Deassert Time
PLEDn Delay Time
PLEDn Pulse Time
Collision Test Assert
Time
Collision Test Deassert
Time
CRS Assert to Transmit
JAM Packet Start
During JAM
LIMIT
MIN TYP MAX
200
700
130
240
300
200
700
240
300
25
80
105
5120
40
300
800
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
mS
mS
nS
nS
nS
nS
t₆₀
COL Rise and Fall Time
10
nS
CONDITIONS
100 Mbps
10 Mbps
100 Mbps
10 Mbps
100 Mbps
10 Mbps
100 Mbps
10 Mbps.
PLEDn Programmed for Collision
PLEDn Programmed for Collision
100 Mbps
10 Mbps
68
MD400159/E