XRT74L73 Datasheet, PDF (203/488 Pages) Exar Corporation – 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

PRELIMINARY
XRT74L73
3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.0.1
TABLE 37: THE RELATIONSHIP BETWEEN THE NUMBER OF RISING CLOCK EDGES IN TXOHCLK, (SINCE TXOHFRAME
WAS LAST SAMPLED "HIGH") TO THE DS3 OVERHEAD BIT, THAT IS BEING PROCESSED
NUMBER OF RISING CLOCK EDGES IN
TXOHCLK
0 (Clock edge is coincident with TxO-
HFrame being detected "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
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