XRT74L73 Datasheet, PDF (208/488 Pages) Exar Corporation – 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

XRT74L73
3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.0.1
PRELIMINARY
TABLE 39: THE RELATIONSHIP BETWEEN THE NUMBER OF TXOHENABLE PULSES (SINCE THE LAST OCCURRENCE OF
THE TXOHFRAME PULSE) TO THE DS3 OVERHEAD BIT, THAT IS BEING PROCESSED BY THE XRT74L73
NUMBER OF TXOHENABLE PULSES
0 (The TxOHEnable and TxOHFrame
signals are both sampled "High")
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
THE OVERHEAD BIT EXPECTED BY THE
XRT74L73
X
F1
AIC
F0
NA
F0
FEAC
F1
X
F1
UDL
F0
UDL
F0
UDL
F1
P
F1
CP
F0
CP
F0
CP
F1
P
F1
FEBE
F0
FEBE
F0
CAN THIS OVERHEAD BIT BE ACCEPTED
BY THE XRT74L73?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Yes
No
209