DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 139
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DS3181
Manufacturer Part Number
DS3181
Description
Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3184DK.pdf
(400 pages)
Specifications of DS3181
Product
Framer
Number Of Transceivers
1
Data Rate
44.736 Mbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
280 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
TEBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
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Price
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of a packet, data transfer will continue from the same port if the port is not almost empty. When the maximum burst
length has been transferred, data transfer will continue from the same port if no other port has data available, and
the port is not almost empty. The maximum burst length is programmable (8 – 256 bytes in four byte increments),
or can be disabled.
10.7 ATM Cell/HDLC Packet Processing
10.7.1 General Description
The ATM cell/packet processing demaps the ATM cells or HDLC packets from the receive data stream and maps
ATM cells or HDLC packets into the transmit data stream. ATM cell / packet processing supports any framed or
unframed bit synchronous or byte synchronous (octet aligned) data stream with a bit or byte rate of 52 MHz or less.
The receive direction extracts the payload from physical data stream, performs cell/packet processing on the
individual lines, and stores the cell/packet data from each line in the FIFO.
The transmit direction removes the cell/packet data for each line from the FIFO, performs cell/packet processing for
each individual line and inserts the payload into the physical data stream.
See
Figure 10-25. ATM Cell/HDLC Packet Functional Diagram
10.7.2 Features
10.7.2.1 General
•
•
•
Clock Rate
Up to 4 data lines(ports) each with a bit or byte rate of 0-52 MHz
Supports bit or byte wide, framed or unframed data lines – Each port is programmable as bit synchronous
or octet aligned, the data stream can be framed or unframed, and the clock can be continuous or gapped.
Bit reordering – The received/transmitted order of the bits as transferred across the system interface is
programmable on a per-port basis. That is, in bit synchronous mode, the first bit received/transmitted by ATM
cell/packet processing can be transferred in bit position 7 (31, 23, 15, or 7) or bit position 0 (24, 16, 8, or 0). In
octet aligned mode, the bit received/transmitted by ATM cell/packet processing in bit position 7 can be
transferred in bit position 7 (31, 23, 15, or 7) or bit position 0 (24, 16, 8, or 0).
Receive
Transmit
DS3/E3
Figure 10-25
DS3/E3
Adapter
LIU
LIU
for the location of the Cell/Packet processing block in the DS318x devices.
Decoder
Encoder
B3ZS/
B3ZS/
HDB3
HDB3
TUA1
TAIS
IEEE P1149.1
Access Port
JTAG Test
FEAC
DS3 / E3
Receive
Framer
Formatter
DS3 / E3
Transmit
Buf f er
Trace
Trail
HDLC
UA1
GEN
139
TX FRAC/
PLCP
RX FRAC/
PLCP
Processor
Processor
Rx Packet
Processor
Processor
Tx Packet
RX BERT
TX BERT
Rx Cell
Tx Cell
Microprocessor
Interface
FIFO
FIFO
Tx
Rx
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