DS2156L datasheet(54/262 Pages) DALLAS

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DS2156

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T1TCR1

T1 Transmit Control Register 1

05h

Bit #

Name

TJC

TFPT

TCPT

TSSE

GB7S

TFDLS

TBL

TYEL

Default

Bit 0/Transmit Yellow Alarm (TYEL)

0 = do not transmit yellow alarm

1 = transmit yellow alarm

Bit 1/Transmit Blue Alarm (TBL)

0 = transmit data normally

1 = transmit an unframed all-ones code at TPOS and TNEG

Bit 2/TFDL Register Select (TFDLS)

0 = source FDL or Fs-bits from the internal TFDL register (legacy FDL support mode)

1 = source FDL or Fs-bits from the internal HDLC controller or the TLINK pin

Bit 3/Global Bit 7 Stuffing (GB7S)

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

1 = force bit 7 stuffing in all 0-byte channels regardless of how the SSIEx registers are programmed

Bit 4/Transmit Software Signaling Enable (TSSE).

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

preformed.

1 = source signaling data as enabled by the SSIEx registers

Bit 5/Transmit CRC Pass-Through (TCPT)

0 = source CRC6 bits internally

1 = CRC6 bits sampled at TSER during F-bit time

Bit 6/Transmit F-Bit Pass-Through (TFPT)

0 = F bits sourced internally

1 = F bits sampled at TSER

Bit 7/Transmit Japanese CRC6 Enable (TJC)

0 = use ANSI/AT&T/ITU CRC6 calculation (normal operation)

1 = use Japanese standard JT–G704 CRC6 calculation

DS2156L Datasheet(PDF) 54 Page - Dallas Semiconductor

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