XRT79L74 Datasheet, PDF (59/70 Pages) Exar Corporation – 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

PRELIMINARY
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L74
REV. P1.0.0
FIGURE 14. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L74 IS
OPERATING IN BOTH THE DS3/NIBBLE-PARALLEL AND LOCAL-TIMING MODES
TxInClkn
TxNibClkn
TxNibn[3:0]
TxNibFramen
t18
TxFrameRefn
t14
t15
Nibble [1175]
Nibble [0]
t16
t17
DS3 Frame Number N ^{DS3 Frame Number N + 1}
Sampling Edge of the XRT79L74
57