XRT72L50 Datasheet, PDF (232/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER WITH HDLC CONTROLLER
REV. 1.2.1
áç
TABLE 41: THE RELATIONSHIP BETWEEN THE NUMBER OF RXOHENABLE OUTPUT PULSES ((SINCE RXOHFRAME
WAS LAST SAMPLED "HIGH") TO THE DS3 OVERHEAD BIT, THAT IS BEING OUTPUT VIA THE RXOH OUTPUT PIN
NUMBER OF RXOHENABLE OUTPUT PULSES
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
THE OVERHEAD BIT BEING OUTPUT BY THE
XRT72L50
F1
M0
F1
DL
F0
DL
F0
DL
F1
M1
F1
UDL
FO
UDL
FO
UDL
F1
M0
F1
UDL
F0
UDL
F0
UDL
F1
Figure 79 presents the typical behavior of the Receive Overhead Data Output Interface block, when Method 2
is being used to sample the incoming DS3 overhead bits.
219