XRT72L56 Datasheet, PDF (197/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
PRELIMINARY
XRT72L56
REV. P1.1.2
TABLE 24: 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 XRT72L56
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
30
31
32
33
34
35
36
37
THE OVERHEAD BIT EXPECTED BY THE CAN THIS OVERHEAD BIT BE ACCEPTED BY
XRT72L56
THE XRT72L56?
X
Yes
F1
No
AIC
Yes
F0
No
NA
Yes
F0
No
FEAC
Yes
F1
No
X
Yes
F1
No
UDL
Yes
F0
No
UDL
Yes
F0
No
UDL
Yes
F1
No
P
No
F1
No
CP
Yes
F0
No
CP
Yes
F0
No
CP
Yes
F1
No
P
No
F1
No
FEBE
Yes
F0
No
FEBE
Yes
F0
No
FEBE
Yes
F1
No
M0
No
F1
No
DL
Yes
F0
No
DL
Yes
F0
No
178