XRT74L74 Datasheet, PDF (415/498 Pages) Exar Corporation – 4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER

PRELIMINARY
XRT74L74
4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
REV. P1.1.1
TABLE 89: THE RELATIONSHIP BETWEEN THE NUMBER OF RISING CLOCK EDGES IN TXOHCLK, (SINCE
"TXOHFRAME" WAS LAST SAMPLED "HIGH") TO THE E3 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 CAN THIS OVERHEAD BIT BE ACCEPTED BY
"XRT74L74"
THE XRT74L74?
FA1 Byte - Bit 7
No
FA1 Byte - Bit 6
No
FA1 Byte - Bit 5
No
FA1 Byte - Bit 4
No
FA1 Byte - Bit 3
No
FA1 Byte - Bit 2
No
FA1 Byte - Bit 1
No
FA1 Byte - Bit 0
No
FA2 Byte - Bit 7
No
FA2 Byte - Bit 6
No
FA2 Byte - Bit 5
No
FA2 Byte - Bit 4
No
FA2 Byte - Bit 3
No
FA2 Byte - Bit 2
No
FA2 Byte - Bit 1
No
FA2 Byte - Bit 0
No
EM Byte - Bit 7
No
EM Byte - Bit 6
No
EM Byte - Bit 5
No
EM Byte - Bit 4
No
EM Byte - Bit 3
No
EM Byte - Bit 2
No
EM Byte - Bit 1
No
EM Byte - Bit 0
No
TR Byte - Bit 7
Yes
TR Byte - Bit 6
Yes
TR Byte - Bit 5
Yes
TR Byte - Bit 4
Yes
TR Byte - Bit 3
Yes
TR Byte - Bit 2
Yes
413