DS3252 datasheet(14/71 Pages) MAXIM

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Table 6-G. Transmitter Data Select Options

TDSA

TDSB

E3M

STS

MODE

TRANSMIT DATA SELECTED

Any

Normal data as input at TPOS and TNEG

DS3

STS-1

Unframed all ones

DS3

DS3 AIS per ANSI T1.107 (Figure 9-2)

Any

Unframed 100100… pattern

23 - 1 PRBS pattern per ITU O.151

DS3

STS-1

15 - 1 PRBS pattern per ITU O.151

Note 1:

This coding of the TDSA, TDSB, E3M, and STS bits allows AIS generation to be enabled by

holding TDSA = 0 and changing TDSB from 0 to 1. The type of DS3 AIS signal is selected by the

STS bit with E3M = 0.

Note 2:

If E3M and/or STS are changed when {TDSA,TDSB}

≠ 00, TDSA and TDSB must both be cleared

to 0. After they are cleared, TDSA and TDSB can be configured to transmit a pattern in the new

operating mode.

Table 6-H. Receiver PRBS Pattern Select Options

E3M

STS

MODE

RECEIVER PRBS PATTERN

SELECTED

23 - 1 PRBS pattern per ITU O.151

DS3

STS-1

15 - 1 PRBS pattern per ITU O.151

Table 6-I. Hardware Mode Jitter Attenuator Configuration

TJA

RJA

JITTER ATTENUATOR CONFIGURATION

Disabled

Receive path, 16-bit buffer depth

Transmit path, 16-bit buffer depth

Transmit path, 32-bit buffer depth

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