XRT83VSH28IB datasheet(68/74 Pages) EXAR

68 / 74 page

XRT83VSH28

PRELIMINARY

8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

REV. P1.0.0

BYTEsel

LCV Counter Byte Select

This bit is used to select the MSB or LSB for Reading the contents

of the LCV counter for a given channel. The channel is addressed

by using bits D[3:0] in register 0x8Ch. By default, the LSB byte is

selected.

0 = Low Byte

1 = High Byte

R/W

chUPDATE LCV Counter Update Per Channel

This bit is used to latch the contents of the counter for a given

channel into a holding register so that the value of the counter can

be read. The channel is addressed by using bits D[3:0] in register

0x8Ch.

0 = Normal Operation

1 = Updates the Selected Channel

R/W

chRESET

LCV Counter Reset Per Channel

This bit is used to reset the LCV counter of a given channel to its

default state 0000h. The channel is addressed by using bits D[3:0]

in register 0x8Ch. This bit must be set to "1" for 1

µS.

0 = Normal Operation

1 = Resets the Selected Channel

R/W

TABLE 40: MICROPROCESSOR REGISTER 0X8EH BIT DESCRIPTION

GLOBAL REGISTER (0X8EH)

BIT

NAME

FUNCTION

Type

Default

Value

(HW reset)

LCVCNT7

LCVCNT6

LCVCNT5

LCVCNT4

LCVCNT3

LCVCNT2

LCVCNT1

LCVCNT0

Line Code Violation Byte Contents

These bits contain the LCV counter contents of the Byte selected

by bit D2 in register 0x8Dh for a given channel. The channel is

addressed by using bits D[3:0] in register 0x8Ch. By default, the

contents contain the LSB, however no channel is selected..

R/W

TABLE 39: MICROPROCESSOR REGISTER 0X8DH BIT DESCRIPTION

GLOBAL REGISTER (0X8DH)

BIT

NAME

FUNCTION

Type

Default

Value

(HW reset)

XRT83VSH28IB Datasheet(PDF) 68 Page - Exar Corporation

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