XRT79L71 Datasheet, PDF (223/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
0
TxMA Rx
TYPE
R/W
DESCRIPTION
Transmit MA Byte from Receiver (Frame Synchronizer)
Select:
This READ/WRITE bit-field permits the user to configure the
Frame Generator block to use either the Frame Synchronizer
block or the "Tx MA Byte" Register as the source of the FERF
and FEBE bit-fields (within the MA byte-field of the "outbound"
E3 data stream); as indicated below.
0 - Configures the Frame Generator to read in the contents of the
"Tx MA Byte" register (Direct Address = 0x1136), and write it into
the "MA" byte-field within each "outbound" E3 frame.
NOTE: This option permits the user to send FERF and FEBE
indicators, under software control.
1 - Configures the Frame Generator to set the FERF and FEBE
bit-fields to values, based upon conditions detected by the com-
panion Frame Synchronizer block.
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