DS2152LN datasheet(21/97 Pages) MAXIM

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DS2152

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TCR1: TRANSMIT CONTROL REGISTER 1 (Address = 35 Hex)

(MSB)

(LSB)

LOTCMC

TFPT

TCPT

TSSE

GB7S

TFDLS

TBL

TYEL

SYMBOL

POSITION

NAME AND DESCRIPTION

LOTCMC

TCR1.7

Loss Of Transmit Clock Mux Control. Determines whether

the transmit side formatter should switch to the ever present

RCLKO if the TCLK input should fail to transition

(see Figure 1-1 for details).

0 = do not switch to RCLKO if TCLK stops

1 = switch to RCLKO if TCLK stops

TFPT

TCR1.6

Transmit F-Bit Pass Through. (See note below.)

0 = F bits sourced internally

1 = F bits sampled at TSER

TCPT

TCR1.5

Transmit CRC Pass Through. (See note below.)

0 = source CRC6 bits internally

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

TSSE

TCR1.4

Software Signaling Insertion Enable. (See note below.)

0 = no signaling is inserted in any channel from the TS1–TS12

registers

1 = signaling is inserted in all channels from the TS1–TS12

registers (the TTR registers can be used to block insertion on a

channel-by-channel basis)

GB7S

TCR1.3

Global Bit 7 Stuffing. (See note below.)

0 = allow the TTR 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 TTR registers are programmed

TFDLS

TCR1.2

TFDL Register Select. (See note below.)

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/BOC

controller or the TLINK pin

TBL

TCR1.1

Transmit Blue Alarm. (See note below.)

0 = transmit data normally

1 = transmit an unframed all 1s code at TPOSO and TNEGO

TYEL

TCR1.0

Transmit Yellow Alarm. (See note below.)

0 = do not transmit yellow alarm

1 = transmit yellow alarm

Note: For a description of how the bits in TCR1 affect the transmit side formatter, see Figure 16-11.

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