XRT72L53 Datasheet, PDF (173/467 Pages) Exar Corporation – THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L53
REV. P1.1.7
THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
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PRELIMINARY
TABLE 22: 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
30
31
32
33
34
35
36
37
THE OVERHEAD BIT EXPECTED BY THE CAN THIS OVERHEAD BIT BE ACCEPTED BY
XRT72L53
THE XRT72L53?
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
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