91C94 Datasheet, PDF (111/120 Pages) SMSC Corporation – ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM

RECP
RECN
nCRS
(internal)
1
0
11 0
1
0
1
0
1
0
t35
f irst bit decoded
t36
1
0
11 0
1
0
1
0
1
0
TPERXP(N)
nCRS
(internal)
t37
t38
f irst bit decoded
Parameter
mi n
typ
max
units
t35
Noise Pulse Width Reject (AUI)
15
25
30
ns
t36
Carri er Sense Turn On Del ay (AUI)
50
70
100
ns
t37
Noise Sense Pul se Width Reject (10BA SE-T) 15
25
30
ns
t38
Carrier Sense Turn On Delay (10BASE-T)
450
500
550
ns
FIGURE 38 - RECEIVE TIMING - START OF FRAME (AUI AND 10BASE-T)
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