
XRT94L43
233
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
AE14
STS3RxD_C1J1_3
RxDS3FP_11
TxSTS1FP_11
RxSBFrame_3
O
CMOS
STS-3/STM-1 Receive Telecom Bus - C1/J1 Byte Phase
Indicator Output Signal - Channel 3; DS3/E3 Frame Syn-
chronizer Framing Pulse Output Pin - Channel 11:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface for Channel 3 has
been enabled.
If STS-3/STM-1 Telecom Bus (Channel 3) has been enabled
- STS-3/STM-1 Receive Telecom Bus - C1/J1 Byte Phase
Indicator Output Signal:
This output pin pulses "High" under the following two condi-
tions.
1. Whenever the C1 byte is being output via the
STS3RxD_D_3[7:0] output, and
2. Whenever the J1 byte is being output via the
STS3RxD_D_3[7:0] output.
NOTES:
1.
The STS-3/STM-1 Receive (Drop) Telecom Bus
(associated with Channel 3) will indicate that it is
transmitting the C1 byte (via the STS3RxD_D_3[7:0]
output pins), by pulsing this output pin "High" (for one
period
of
STS3RXD_CLK_3)
and
keeping
the
STS3RXD_PL_3 output pin pulled "Low".
2.
The STS-3/STM-1 Receive (Drop) Telecom Bus
(associated with Channel 3) will indicate that it is
transmitting the J1 byte (via the STS3RXD_D_3[7:0]
output pins), by pulsing this output pin "High" (for one
period
of
STS3RXD_CLK_3)
while
the
STS3TXD_PL_3 output pin is pulled "High".
If STS-3/STM-1 Telecom Bus (Channel 3) is disabled -
RxDS3FP_11 (Receive DS3 Frame Pulse Input/Output -
Channel 11):
If the STS-3/STM-1 Telecom Bus (Channel 3) is disabled and if
the DS3/E3 Framer block is enabled then this pin will function
as the Receiving Framing Reference output pin. In this mode,
the Frame Synchronizer block (associated with Channel 11)
will pulse this output pin "High" for one DS3/E3 bit-period, coin-
cident with the first bit (within a given DS3 or E3 frame) being
output via the DS3/E3/STS1_Data_OUT_11 output pin.
NOTE: This pin is inactive if the Frame Synchronizer block,
associated with Channel 11 is by-passed.
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
PIN #SIGNAL NAME
I/O
SIGNAL
TYPE
DESCRIPTION