XRT86VL30 datasheet(65/188 Pages) EXAR

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XRT86VL30

REV. 1.0.0

SINGLE T1/E1/J1 FRAMER/LIU COMBO - E1 REGISTER DESCRIPTION

LB1ENB

R/W

Local Loopback 1 auto enable

This bit enables or disables local loopback mode when the National

bits (Sa5, Sa6) and the A bit (remote alarm bit) received from the

transmit backplane interface follows a specific pattern.

Local loopback is activated when the National Bits (Sa5, Sa 6) and

A bit (remote alarm bit) follow the following pattern from the transmit

serial input. (TxSER_n pin)

Sa5 = 00000000 occur for 8 consecutive times

Sa6 = 11111111

occur for 8 consecutive times

= 11111111

occur for 8 consecutive times

NOTE:

This feature only works if Sa bits are provided from the

transmit serial input pin (TxSER_n)

LB2ENB

R/W

Local Loopback 2 auto enable

This bit enables or disables local loopback mode when the National

bits (Sa5, Sa6) received from the transmit backplane interface fol-

lows a specific pattern.

Local loopback is activated when the National Bits (Sa5, Sa 6) and

A bit (remote alarm bit) follow the following pattern from the transmit

serial input. (TxSER_n pin)

Sa5 = 00000000 occur for 8 consecutive times, and

Sa6 = 10101010 occur for 8 consecutive times, and

= 11111111

occur for 8 consecutive times

NOTE:

This feature only works if Sa bits are provided from the

transmit serial input pin (TxSER_n)

LBRENB

R/W

Local Loopback release enable

This bit releases the local loopback mode when the National bits

(Sa5, Sa6) received from the transmit backplane interface follows a

specific pattern.

Local loopback is released when the National Bits (Sa5, Sa 6) follow

the following pattern from the transmit serial input. (TxSER_n pin)

Sa5 = 00000000 occur for 8 consecutive times

Sa6 = 00000000 occur for 8 consecutive times

NOTE:

This feature only works if Sa bits are provided from the

transmit serial input pin (TxSER_n)

TABLE 40: TRANSMIT Sa SELECT REGISTER (TSASR)

HEX ADDRESS: 0X0130

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

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