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XRT86VL30IV80 Datasheet(PDF) 9 Page - Exar Corporation

Part # XRT86VL30IV80
Description  T1/E1/J1 BITS ELEMENT - HARDWARE MANUAL
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT86VL30IV80 Datasheet(HTML) 9 Page - Exar Corporation

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XRT86VL30
7
REV. 1.0.3
T1/E1/J1 BITS ELEMENT - HARDWARE MANUAL
TRANSMIT SYSTEM SIDE INTERFACE
SIGNAL NAME
128-PIN# 80-PIN#
TYPE
OUTPUT
DRIVE(MA)
DESCRIPTION
TxSER/
TxPOS
55
30
I
-
Transmit Serial Data Input (TxSER)/Transmit Positive Dig-
ital Input (TxPOS):
The exact function of this pin depends on the mode of opera-
tion selected, as described below.
DS1/E1 Mode - TxSER
This pin functions as the transmit serial data input on the sys-
tem side interface, which are latched on the rising edge of the
TxSERCLk pin. Any payload data applied to this pin will be
inserted into an outbound DS1/E1 frame and output to the
line. In DS1 mode, the framing alignment bits, facility data link
bits, CRC-6 bits, and signaling information can also be
inserted from this input pin if configured appropriately. In E1
mode, all data intended to be transported via Time Slots 1
through 15 and Time slots 17 through 31 must be applied to
this input pin. Data intended for Time Slots 0 and 16 can also
be applied to this input pin If configured accordingly.
DS1 or E1 High-Speed Multiplexed Mode* - TxSER
In this mode, this pin is used as the high-speed multiplexed
data input pin on the system side. High-speed multiplexed
data must be applied to TxSER in a byte or bit-interleaved
way. The three unused channels are ignored for the single
channel device. The framer latches in the multiplexed data on
TxSER using TxMSYNC/TxINCLK and demultiplexes this
data into 1 serial stream and 3 unused serial streams. The
LIU block will then output the data to the line interface using
TxSERCLK.
DS1 or E1 Framer Bypass Mode - TxPOS
In this mode, TxSER is used for the positive digital input pin
(TxPOS) to the LIU.
NOTE:
1.
*High-speed multiplexed modes include (For T1/E1)
16.384MHz HMVIP, H.100, Bit-multiplexed modes,
and (For T1 only) 12.352MHz Bit-multiplexed mode.
2.
In DS1 high-speed modes, the DS-0 data is mapped
into an E1 frame by ignoring every fourth time slot
(don’t care).
3.
This pin is internally pulled “High”.


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