DS3184DK Maxim Integrated Products, DS3184DK Datasheet - Page 190
DS3184DK
Manufacturer Part Number
DS3184DK
Description
KIT DEMO FOR DS3184
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3184DK.pdf
(400 pages)
Specifications of DS3184DK
Main Purpose
Telecom, ATM / Packet PHYs
Utilized Ic / Part
DS3184
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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10.14 Line Encoder/Decoder
10.14.1 General Description
The B3ZS/HDB3 Decoder converts a bipolar signal to a unipolar signal in the receive direction. B3ZS/HDB3
Encoder converts a unipolar signal to a bipolar signal in the transmit direction.
In the transmit direction, the Encoder converts the unipolar signal to a bipolar signal, optionally performing zero
suppression encoding (HDB3/B3ZS), optionally inserting errors, and outputs the bipolar signal.
In the receive direction, the Decoder receives a bipolar signal, monitors it for alarms and errors, optionally
performing zero suppression decoding (HDB3/B3ZS), and converts it to a unipolar signal.
If the port line interface is configured for a Unipolar mode and the framer is not configured for one of the “-OHM”
modes, the BPV detector will count pulses on the RLCVn pin.
Encoder/Decoder block in the DS318x devices.
Figure 10-51. Line Encoder/Decoder Block Diagram
10.14.2 Features
•
•
•
•
10.14.3 B3ZS/HDB3 Encoder
B3ZS/HDB3 Encoder performs unipolar to bipolar conversion and zero suppression encoding.
Unipolar to bipolar conversion converts the unipolar data stream into an AMI bipolar data stream (POS and NEG).
In an AMI bipolar data stream a zero is represented by a zero on both the POS and NEG signals, and a one is
represented by a one on a bipolar signal (POS or NEG), and a zero on the other bipolar signal (NEG or POS).
Successive ones are represented by ones that are alternately output on the POS and NEG signals. I.e., if a one is
represented by a one on POS and a zero on NEG, the next one will be represented by a one on NEG and a zero
on POS.
Performs bipolar to unipolar encoding and decoding – Converts a unipolar signal into an AMI bipolar signal
(POS data, and NEG data) and vice versa.
Programmable zero suppression – B3ZS or HDB3 zero suppression encoding and decoding can be
performed, or the bipolar data stream can be left as an AMI encoded data stream.
Programmable receive zero suppression code format – The signature of B3ZS or HDB3 is selectable.
Generates and detects alarms and errors – In the receive direction, detects LOS alarm condition BPV
errors, and EXZ errors. In the transmit direction, errors can be inserted into the outgoing data stream.
Clock Rate
Receive
Transmit
DS3/E3
DS3/E3
Adapter
LIU
LIU
Decoder
Encoder
B3ZS/
B3ZS/
HDB3
HDB3
TUA1
TAIS
IEEE P1149.1
JTAG Test
Access Port
FEAC
DS3 / E3
Framer
DS3 / E3
Transmit
Receive
Formatter
Buffer
Trace
Trail
HDLC
190
GEN
UA1
TX FRAC/
PLCP
RX FRAC/
Figure 10-51
PLCP
shows the locations of the Line
Rx Packet
Processor
Processor
Processor
Processor
RX BERT
Tx Packet
TX BERT
Rx Cell
Tx Cell
Microprocessor
Interface
FIFO
FIFO
Tx
Rx
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