XRT7250 Datasheet, PDF (44/463 Pages) Exar Corporation – DS3/E3 FRAMER IC

áç
DS3/E3 FRAMER IC
XRT7250
REV. 1.1.1
1.0 TIMING DIAGRAMS
FIGURE 1. TIMING DIAGRAM FOR TRANSMIT PAYLOAD INPUT INTERFACE, WHEN THE XRT7250 DEVICE IS OPERAT-
ING IN BOTH THE DS3 AND LOOP-TIMING MODES
XRT7250 Transmit Payload Data I/F Signals
t3
RxOutClk
TxSer
TxFrame
TxOH_Ind
Payload[4702] Payload[4703]
X-Bit
t2
t1
Payload[0]
t4
DS3 Frame Number N
DS3 Frame Number N + 1
FIGURE 2. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD INPUT INTERFACE, WHEN THE XRT7250 DEVICE IS OPER-
ATING IN BOTH THE DS3 AND LOCAL-TIMING MODES
XRT7250 Transmit Payload Data I/F Signals
t6
t5
TxInClk
TxSer
TxFrameRef
Payload[4702] ^{Payload[4703]}
TxOH_Ind
t8
t7
X-Bit
Payload[1]
t9
t10
DS3 Frame Number N DS3 Frame Number N + 1
25