Rainbow Electronics DS21458 - Manual (Page 66)

DS21455/DS21458 Quad T1/E1/J1 Transceivers
66 of 270
Register Name:
E1TCR1
Register Description: E1 Transmit Control Register 1
Register Address: 35h
Bit
# 7 6 5 4 3 2 1 0
Name TFPT T16S TUA1 TSiS TSA1 THDB3 TG802 TCRC4
Default 0 0 0 0 0 0 0 0
Bit 0/Transmit CRC-4 Enable (TCRC4).
0 = CRC-4 disabled
1 = CRC-4 enabled
Bit 1/Transmit G.802 Enable (TG802). See the Functional Timing Diagrams section for details.
0 = do not force TCHBLK high during bit 1 of time slot 26
1 = force TCHBLK high during bit 1 of time slot 26
Bit 2/Transmit HDB3 Enable (THDB3).
0 = HDB3 disabled
1 = HDB3 enabled
Bit 3/Transmit Signaling All Ones (TSA1).
0 = normal operation
1 = force time slot 16 in every frame to all ones
Bit 4/Transmit International Bit Select (TSiS).
0 = sample Si bits at TSER pin
1 = source Si bits from TAF and TNAF registers (in this mode, E1TCR1.7 must be set to zero)
Bit 5/Transmit Unframed All Ones (TUA1).
0 = transmit data normally
1 = transmit an unframed all one’s code at TPOSO and TNEGO
Bit 6/Transmit Time Slot 16 Data Select (T16S). See the Transmit Signaling section for details.
0 = time slot 16 determined by the SSIEx registers and the THSCS function in the PCPR register
1 = source time slot 16 from TS1 to TS16 registers
Bit 7/Transmit Time Slot 0 Pass Through (TFPT).
0 = FAS bits/Sa bits/Remote Alarm sourced internally from the TAF and TNAF registers
1 = FAS bits/Sa bits/Remote Alarm sourced from TSER