Datasheet

DS26521 Single T1/E1/J1 Transceiver
181 of 258
Register Name:
TCR1 (T1 Mode)
Register Description:
Transmit Control Register 1
Register Address:
181h
Bit # 7 6 5 4 3 2 1 0
Name TJC TFPT TCPT TSSE GB7S TB8ZS TAIS TRAI
Default 0 0 0 0 0 0 0 0
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