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DS21FT40 Datasheet(PDF) 27 Page - Dallas Semiconductor

Part # DS21FT40
Description  Four x Three 12 Channel E1 Framer
Download  87 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS21FT40 Datasheet(HTML) 27 Page - Dallas Semiconductor

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DS21FT40
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SYMBOLS
POSITION
NAME AND DESCRIPTION
RBCS
RCR2.2
Receive Side Backplane Clock Select.
0 = if RSYSCLK is 1.544 MHz
1 = if RSYSCLK is 2.048 MHz
RESE
RCR2.1
Receive Side Elastic Store Enable.
0 = elastic store is bypassed
1 = elastic store is enabled
RCR2.0
Not Assigned. Should be set to zero when written.
TCR1: TRANSMIT CONTROL REGISTER 1 (Address=12 Hex)
(MSB)
(LSB)
ODF
TFPT
T16S
TUA1
TSiS
TSA1
TSM
TSIO
SYMBOLS
POSITION
NAME AND DESCRIPTION
ODF
TCR1.7
Output Data Format.
0 = bipolar data at TPOS and TNEG
1 = NRZ data at TPOS; TNEG=0
TFPT
TCR1.6
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
T16S
TCR1.5
Transmit Timeslot 16 Data Select.
0 = sample timeslot 16 at TSER pin
1 = source timeslot 16 from TS0 to TS15 registers
TUA1
TCR1.4
Transmit Unframed All Ones.
0 = transmit data normally
1 = transmit an unframed all one’s code at TPOS and TNEG
TSiS
TCR1.3
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)
TSA1
TCR1.2
Transmit Signaling All Ones.
0 = normal operation
1 = force timeslot 16 in every frame to all ones
TSM
CR1.1
TSYNC Mode Select.
0 = frame mode (see the timing in Section 16)
1 = CAS and CRC4 multiframe mode (see the timing in
Section 16)
TSIO
TCR1.0
TSYNC I/O Select.
0 = TSYNC is an input
1 = TSYNC is an output
NOTE:
See Figure 16–15 for more details about how the Transmit Control Registers affect the operation of the
DS21FT40.


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