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XRT94L43
313
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
NOTE: The values for t21 and t22 can be found in Table 19. 9.0
TRANSMIT SECTION DCC INSERTION INPUT PORT
9.1
Transmit Section DCC Insertion Input Port
The Transmit Section DCC Insertion Input Port provides a dedicated port for the user to insert his/her own
value for the D1, D2 and D3 bytes within the outbound STS-12/STM-4 data-stream. The user should note that
the TxSDCC input pin is sampled (by the Transmit Section DCC Insertion Input Port) upon the rising edge of
FIGURE 24. TIMING WAVEFORM OF THE TRANSMIT ORDER-WIRE BYTE OVERHEAD INPUT PORT
TABLE 19: TIMING INFORMATION FOR THE TRANSMIT ORDER-WIRE BYTE OVERHEAD INPUT PORT
SYMBOL
DESCRIPTION
MIN.
TYP.
MAX.
t21
Falling edge of TxTOHClk to rising edge of TxE1F1F2Enable
and TxE1F1F2Frame
-0.5ns
0.5ns
t22
TxE1F1F2 Data to rising edge of TxTOHClk set-up time
11ns
TxE1F1E2
TxTO HC lk
TxE1F1E2Fr
TxE1F1E2Enb
t
21
t
22