XRT79L71 Datasheet, PDF (234/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
7
TxSSM Enable
6-4
3-0
Unused
TxSSM[3:0]
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TYPE
R/W
R/O
R/W
DESCRIPTION
Transmit SSM Enable:
This READ/WRITE bit-field permits the user to configure the
Frame Generator block to operate in either the "Old ITU-T G.832
Framing" format or in the "New ITU-T G.832 Framing" format.
0 - Configures the Frame Generator block to support the "Pre
October 1998" version of the E3, ITU-T G.832 framing format.
1 - Configures the Frame Generator block to support the "Octo-
ber 1998" version of the E3, ITU-T G.832 framing format.
Transmit Synchronization Status Message[3:0]:
These READ/WRITE bit-fields permit the user to exercise soft-
ware control over the contents of the "SSM" bits, within the MA
byte of the "outbound" E3 data-stream.
NOTE: These bit-fields are only active if the DS3/E3 Frame
Generator block is active, and if Bit 7 (TxSSM Enable) of
this register is set to "1".
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