XRT72L50 Datasheet, PDF (41/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. 1.2.1
FIGURE 7. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 1 ACCESS)
t21
t22 t23
TxOHClk
TxOHFrame
TxOHIns
TxOH
X bit = 0
t24 t25
Remaining Overhead Bits with DS3 Frame
X bit = 0
FIGURE 8. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 2 ACCESS)
T xIn C lk
t26
t27
TxOHFram e
TxO HE nable Pulse # 8
TxO HE nable
TxO HIns
TxOH
t29A
X bit = 0
t28
t29
XRT72L5x sam ples TxOH here.
X bit = 0
28