XRT75L03D Datasheet, PDF (12/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L03D
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REV. 1.0.0 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
SYSTEM-SIDE TRANSMIT INPUT AND TRANSMIT CONTROL PINS
PIN #
SIGNAL NAME
TYPE
DESCRIPTION
40
DMO_0
127
DMO_1
22
DMO_2
O Drive Monitor Output - Channel 0:
Drive Monitor Output - Channel 1:
Drive Monitor Output - Channel 2:
These output signals are used to indicate some sort of fault condition within
the Transmit Output signal path.
This output pin will toggle "High" anytime the Transmit Drive Monitor cir-
cuitry either, via the corresponding MTIP and MRING input pins or inter-
nally, detects no bipolar pulses via the Transmit Output line signal (e.g., via
the TTIP_n and TRING_n output pins) for 128 bit-periods.
This output pin will be driven "Low" anytime the Transmit Drive Monitor cir-
cuitry has detected at least one bipolar pulse via the Transmit Output line
signal within the last 128 bit periods.
67
TxClkINV/
SClk
I
Hardware Mode: Transmit Clock Invert
Host Mode: Serial Clock Input:
Hardware mode
This input pin is used to select the edge of the TxCLK_n input that the
Transmit Section of all channels will use to sample the TPDATA_n and
TNDATA_n input pins.
Setting this input pin “High” configures all three Transmitters to sample the
TPData_n and TNData_n data on the rising edge of the TxClk_n .
Setting this input pin “Low” configures all three Transmitters to sample the
TPData_n and TNData_n data on the falling edge of the TxClk_n .
Host Mode
In the Host Mode this pin functions as SClk input pin please refer to the pin
descriptions for the Microprocessor interface.
7