DS21FT44 Datasheet, PDF (35/110 Pages) Dallas Semiconductor – 4x3 Twelve Channel E1 Framer, 4x4 Sixteen Channel E1 Framer

DS21FT44/DS21FF44
TCR1: TRANSMIT CONTROL REGISTER 1 (Address=12 Hex)
(MSB)
(LSB)
ODF
TFPT
T16S
TUA1
TSiS
TSA1
TSM
TSIO
SYMBOL
POSITION NAME AND DESCRIPTION
ODF
TFPT
T16S
TUA1
TSiS
TSA1
TSM
TSIO
TCR1.7
TCR1.6
TCR1.5
TCR1.4
TCR1.3
TCR1.2
CR1.1
TCR1.0
Output Data Format.
0 = bipolar data at TPOS and TNEG
1 = NRZ data at TPOS; TNEG=0
Transmit Timeslot 0 Pass Through.
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
Transmit Timeslot 16 Data Select.
0 = sample timeslot 16 at TSER pin
1 = source timeslot 16 from TS0 to TS15 registers
Transmit Unframed All Ones.
0 = transmit data normally
1 = transmit an unframed all one’s code at TPOS and TNEG
Transmit International Bit Select.
0 = sample Si bits at TSER pin
1 = source Si bits from TAF and TNAF registers (in this
mode, TCR1.6 must be set to 0)
Transmit Signaling All Ones.
0 = normal operation
1 = force timeslot 16 in every frame to all ones
TSYNC Mode Select.
0 = frame mode (see the timing in Section 22)
1 = CAS and CRC4 multiframe mode (see the timing in
Section 22)
TSYNC I/O Select.
0 = TSYNC is an input
1 = TSYNC is an output
NOTE:
See Figure 22–15 for more details about how the Transmit Control Registers affect the operation of the
DS21Q44.
TCR2: TRANSMIT CONTROL REGISTER 2 (Address=13 Hex)
(MSB)
Sa8S
Sa7S
Sa6S
Sa5S
Sa4S
ODM
AEBE
(LSB)
PF
SYMBOL
POSITION NAME AND DESCRIPTION
Sa8S
TCR2.7
Sa8 Bit Select. Set to one to source the Sa8 bit from the
TLINK pin; set to zero to not source the Sa8 bit. See Section
22 for timing details.
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