參數(shù)資料
型號: CN8223EPF
英文描述: ATM/SONET TRANSCEIVER|CMOS|QFP|160PIN|PLASTIC
中文描述: 的ATM / SONET的收發(fā)器|的CMOS | QFP封裝| 160PIN |塑料
文件頁數(shù): 15/161頁
文件大?。?/td> 1865K
代理商: CN8223EPF
CN8223
1.0 Product Description
ATM Transmitter/Receiver with UTOPIA Interface
1.3 Line Framing Functions
100046D
Conexant
1-5
1.3 Line Framing Functions
The CN8223 provides framers for DS3, E3 (both G.751 and G.832), E4 (G.832),
STS-1, and STS-3c/STM-1 formatted serial streams. The line receive circuitry
recovers the frame location from the serial stream and provides cell octets to the
physical layer block for cell delineation. The transmit circuitry receives cell octets
from the cell generation or physical layer blocks and adds line framing overhead
information as required. The LIU receive interface detects both Loss-of-Signal
(LOS) and Line Code Violations (LCVs). The active edge of the transmit output
clock is selectable.
Figure 1-2
illustrates the line framer functions of the CN8223.
CN8223 line framing functions include the following:
STS-1, STS-3c, STM-1, DS3, E3, E4, TAXI
External framer interface
Parallel interface
Unframed serial interface
HDB3/B3ZS encode/decode
Line overhead insertion/extraction
SONET scrambling
Error insertion
Alarm detection/generation
Figure 1-2. Line Framer Diagram
DS3, E3, E4, STS-1
STS-3c, STM-1
Transmit Framer
DS3, E3, E4, STS-1
STS-3c, STM-1
Receive Framer
Rx
HDLC
Tx
FEAC
Tx
HDLC
Tx
Overhead
Insert
Rx
Overhead
Extract
Line
Interfaces
9
9
Parallel
Interface
High
Speed
Medium
Speed
8
TXOVH
TMRKR
TOVH_CLK
TCLKO_HS
±
TXOUT_HS
±
TXCKI_HS
±
RXCKI_HS
±
RXIN_HS
±
TCLKO
TXOUT
TXCKI
RXCKI
RXIN
TXOUT[7:0]
RCV_HLD
LOCD
RXIN[7:0]
Rx
FEAC
RMRKR
ROVH_CLK
8
RXOVH
CN8223
Cell
Processing
8
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