XRT86VL32IB datasheet(19/65 Pages) EXAR

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XRT86VL32

REV. V1.2.0

DUAL T1/E1/J1 FRAMER/LIU COMBO - HARDWARE DESCRIPTION

TxOHCLK0

TxOHCLK2

A11

N18

Transmit OH Serial Clock Output Signal(TxOHCLKn)

This pin functions as an overhead output clock signal for the

transmit overhead interface, and its function is explained

below.

DS1 Mode

If the TxOH pins have been configured to be the source for

Datalink bits, the DS1 transmit framer will provide a clock edge

for each Data Link Bit. In DS1 ESF mode, the TxOHCLK can

either be a 2kHz or 4kHz output signal depending on the

selection of Data Link Bandwidth (Register 0xn10A).

Data Link Equipment can provide data to the TxOHn pin on the

rising edge of TxOHCLK. The framer latches the data on the

falling edge of this clock signal.

E1 Mode

If the TxOH pins have been configured to be the source for

Data Link bits, the E1 transmit framer will provide a clock edge

for each National Bit (Sa bits) that has been configured to carry

data link information. (Register 0xn10A)

TRANSMIT OVERHEAD INTERFACE

SIGNAL NAME

BALL #TYPE

OUTPUT

DRIVE(MA)

DESCRIPTION

XRT86VL32IB Datasheet(PDF) 19 Page - Exar Corporation