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XRT94L31
123
REV. 1.0.1
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
NOTE: The values for t25 and t26 can be found in
1.10
RECEIVE TOH OVERHEAD OUTPUT PORT
The Receive TOH Overhead Output port is used to extract out the values of the TOH bytes within the incoming
STS-3/STM-1 data-stream. All of the Receive TOH Overhead Output port signals are updated upon the falling
edge of RxTOHClk. The timing wave-form and information for the Receive TOH Overhead Output Port is
presented below.
FIGURE 26. ILLUSTRATION OF THE TIMING WAVE-FORM OF THE TRANSMIT LINE DCC INSERTION INPUT PORT
TABLE 27: TIMING INFORMATION FOR THE TRANSMIT LINE DCC INSERTION INPUT PORT
SYMBOL
DESCRIPTION
MIN.
TYP.
MAX.
t25
Falling edge of TxTOHClk to rising edge of TxLDCCEnable
-0.5ns
0.2ns
t26
TxLDCC Data to rising edge of TxTOHClk set-up time
4ns
TxLDCC
TxLDCCEnb
TxTOHClk
t25
t26