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XRT94L43
317
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
NOTE: The values for t29 and t30 can be found in Table 23. 13.0 RECEIVE ORDERWIRE (E1, F1, E2) BYTES OVERHEAD OUTPUT PORT
13.1
Receive E1, F1, E2 (Order-Wire) Byte Overhead Output Port
The Receive Order-wire Byte Overhead output port provides a dedicated port for the user to extract out the
Order-wire (e.g., the E1, F1 and E2) bytes from that within the incoming STS-12/STM-4 data-stream. The user
FIGURE 28. TIMING WAVEFORM OF THE RECEIVE POH OVERHEAD OUTPUT PORT
TABLE 23: TIMING INFORMATION FOR THE RECEIVE POH OVERHEAD OUTPUT PORT
SYMBOL
DESCRIPTION
MIN.
TYP.
MAX.
t29
Falling edge of RxPOHClk to rising edge of RxPOHFrame
and RxPOHValid
0.2ns
3ns
t30
Falling edge of RxPOHClk to RxPOH output delay
0.2ns
1.5ns
RxPO H
RxPO HC lk
RxPO HFram e
RxPO HValid
t
29
t
30