CX28344 Conexant, CX28344 Datasheet - Page 85

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

CX28342/3/4/6/8 Data Sheet
Figure 2-17. Receiver System Side Outputs
28348-DSH-001-B
b)
a)
e)
1.
2.
In cases where the system may find this useful, options are available (via the RxAll1
and RxAIS fields of the Feature5 Control register) to produce either an all-1s or an
AIS output, respectively, on the RXDAT pin, completely masking the received input.
In addition, an automatic assertion of an all-1s stream is available (via the
RxAutoAll1 mode control bit in Feature5 Control register). When the automatic mode
is on, detection in the receiver of one or more of the following events produces an all-
1s sequence. The events are LOS, OOF, AIS, Idle in DS3 mode, and LOS, OOF, AIS
in E3 mode. Termination of all these events, terminates the all-1s stream assertion.
Notice, however, that the data stream arriving from the line is otherwise normally
handled and results in all the expected indications relating to internal-processing and
performance-monitoring, without regard for these options.
NOTE:
P
e.
C
Figure 2-17
signal, and overhead marker signal.
P
Mindspeed Technologies™
During an OOF condition, the system-side interface continues to function relative to
the previous framing position (the RXMSY, RXGAPCK, and REXTCK signals are
relative to the previous framing position.) until a new framing template is located,
and the OOF condition is turned off.
O
P
illustrates two options of RXMSY signal, frame synchronization
O
P
Internally-used Rx clock,
nominal (RXCKI or LINECK)
RXDAT, data output
RXMSY, frame synchronisation option
RXMSY, overhead marker option
Functional Description
100542_020
2
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