XRT72L56 Datasheet, PDF (457/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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PRELIMINARY
XRT72L56
SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.2
TABLE 91: THE RELATIONSHIP BETWEEN THE NUMBER OF RXOHENABLE OUTPUT PULSES (SINCE RXOHFRAME WAS
LAST SAMPLED "HIGH") TO THE E3 OVERHEAD BIT, THAT IS BEING OUTPUT VIA THE RXOH OUTPUT PIN
NUMBER OF RXOHENABLE OUTPUT PULSES
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
THE OVERHEAD BIT BEING OUTPUT BY THE
XRT72L56
NR Byte - Bit 6
NR Byte - Bit 5
NR Byte - Bit 4
NR Byte - Bit 3
NR Byte - Bit 2
NR Byte - Bit 1
NR Byte - Bit 0
GC Byte - Bit 7
GC Byte - Bit 6
GC Byte - Bit 5
GC Byte - Bit 4
GC Byte - Bit 3
GC Byte - Bit 2
GC Byte - Bit 1
GC Byte - Bit 0
Figure 207 presents the typical behavior of the Re-
ceive Overhead Data Output Interface block, when
Method 2 is being used to sample the incoming E3
overhead bits.
438