XR72L52 Datasheet, PDF (32/480 Pages) Exar Corporation – TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L52
REV. 1.0.1
PIN DESCRIPTION
PIN #
134
PIN NAME
TxNib3[0]/
TxHDLCDat3[0]
135
2[0]/
TxHDLCDat2[0]
136
TxNib1[0]/
TxHDLCDat1[0]
137
TxNib0[0]/
TxHDLCDat0[0]
138
TxAISEn[0]
xr
TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
TYPE
I
I
DESCRIPTION
Transmit Nibble-Parallel Payload Data Input -3:
The Terminal Equipment is expected to input data that is intended to be trans-
mitted to the remote terminal over an E3 or DS3 transport medium. The Framer
IC takes data applied to this pin along with TxNib1, TxNib2, and TxNib3, and
inserts it into an outbound E3 or DS3 frame. The XRT72L52 samples the data
that is at these input pins upon the rising edge of the TxNibClk signal.
NOTE: This input pin is active only if the Nibble-Parallel Mode has been
selected.
Transmit HDLC Data Input - 3:
This pin accepts bit 3 TxHDLC data when the HDLC controller is turned on.
Transmit Nibble-Parallel Payload Data Input -2:
The Terminal Equipment is expected to input data that is intended to be trans-
mitted to the remote terminal over an E3 or DS3 transport medium. The Framer
IC takes data applied to this pin and inserts it into an outbound E3 or DS3 frame.
The XRT72L52 samples the data that is at these input pins, upon the rising edge
of the TxNibClk signal.
NOTE: This input pin is active only if the Nibble-Parallel Mode has been
selected.
Transmit HDLC Data Input - 2:
This pin accepts bit 2 TxHDLC data when the HDLC controller is turned on.
I Transmit Nibble-Parallel Payload Data Input -1:
The Terminal Equipment is expected to input data that is intended to be trans-
mitted to the remote terminal over an E3 or DS3 transport medium. The Framer
IC takes data applied to this pin and inserts it into an outbound E3 or DS3 frame.
The XRT72L52 samples the data that is at these input pins upon the rising edge
of the TxNibClk signal.
NOTE: This input pin is active only if the Nibble-Parallel Mode has been
selected.
Transmit HDLC Data Input - 1:
This pin accepts bit 1 TxHDLC data when the HDLC controller is turned on.
I Transmit Nibble-Parallel Payload Data Input -0:
The Terminal Equipment is expected to input data that is intended to be trans-
mitted to the remote terminal over an E3 or DS3 transport medium. The Framer
takes data applied to this pin along with TxNib1, TxNib2, and TxNib3, and
inserts it into an outbound E3 or DS3 frame. The XRT72L52 samples the data
that is at these input pins upon the rising edge of the TxNibClk signal.
NOTE: This input pin is active only if the Nibble-Parallel Mode has been
selected.
Transmit HDLC Data Input - 0:
This pin accepts bit 0 TxHDLC data when the HDLC controller is turned on.
I Transmit AIS Command Input:
Setting this input pin "High" configures the Transmit Section to generate and
transmit an AIS Pattern.
Setting this input pin "Low" configures the Transmit Section to generate E3 or
DS3 traffic in a normal manner.
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