DS26521 datasheet(181/258 Pages) MAXIM

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DS26521 Single T1/E1/J1 Transceiver

181 of 258

TCR1 (T1 Mode)

Transmit Control Register 1

181h

Bit #

Name

TJC

TFPT

TCPT

TSSE

GB7S

TB8ZS

TAIS

TRAI

Default

Note: See TCR1 for E1 mode.

Bit 7: Transmit Japanese CRC-6 Enable (TJC).

0 = use ANSI/AT&T:ITU-T CRC-6 calculation (normal operation)

1 = use Japanese standard JT-G704 CRC-6 calculation

Bit 6: Transmit F-Bit Pass Through (TFPT).

0 = F-bits sourced internally

1 = F-bits sampled at TSER

Bit 5: Transmit CRC Pass Through (TCPT).

0 = source CRC-6 bits internally

1 = CRC-6 bits sampled at TSER during F-bit time

Bit 4: Transmit Software-Signaling Enable (TSSE). This function is enabled by TB7ZS (TCR2.0).

0 = do not source signaling data from the TSx registers regardless of the SSIEx registers. The SSIEx

registers still define which channels are to have B7 stuffing performed.

1 = source signaling data as enabled by the SSIEx registers.

Bit 3: Global Bit 7 Stuffing (GB7S). This function is enabled by TB7ZS (TCR2.0).

0 = allow the SSIEx registers to determine which channels containing all zeros are to be bit 7 stuffed

1 = force bit 7 stuffing in all zero-byte channels of that port, regardless of how the SSIEx registers are

programmed

Bit 2: Transmit B8ZS Enable (TB8ZS).

0 = B8ZS disabled

1 = B8ZS enabled

Bit 1: Transmit Alarm Indication Signal (TAIS).

0 = transmit data normally

1 = transmit an unframed all-ones code at TTIP and TRING

Bit 0: Transmit Remote Alarm Indication (TRAI).

0 = do not transmit remote alarm

1 = transmit remote alarm

DS26521 Datasheet(PDF) 181 Page - Maxim Integrated Products

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