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參數(shù)資料
| 型號(hào)： | μPD98404 |
| 廠商： | NEC Corp. |
| 英文描述： | High-performance ATM controller(高性能異步傳輸模式控制器) |
| 中文描述： | 高性能自動(dòng)柜員機(jī)控制器（高性能異步傳輸模式控制器） |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大小： | 23K |
| 代理商： | ΜPD98404 |
μP D 9 8 4 0 4 L O C A L A T M S O N E T / S D H F R A M E R
( N E A S C O T-P 3 0
T M
)
B L O C K
D I A G R A M
Transmit
ATM
98YL-0164B (6/98)
Receive
ATM
Bus
Interface
Signals
OAM
Interface
Signals
Transmit
PMD
Receive
PMD
PMD
Interface
Clock
Recovery
and
Clock
Synthesizer
Transmit
Overhead Processor
Transmit
Overhead Processor
Control
Interface
Loopback
ATM
Interface
Serial/
Parallel
Conversion
Scrambler
Descrambler
Cell
Delineation
HEC
Generation/
Verification
Cell
Scrambler/
Descrambler
Loopback
Transmit/
Receive
FIFO
F E A T U R E S
Complies with ATM Forum SONET/SDH UNI specification
Implements ATM Transmission Convergence (TC) sublayer function
Operates at the SONET STS-3c/SDH STM-1 (156 Mbps), and the STS-1 (52 Mbps)
Recovers the received clock from the received SONET/SDH data stream
Supports the standard Operation and Maintenance (OAM) function
Supports internal loopback at the media side and ATM layer side
Compatible with ATM Forum UTOPIA Level1 and Level2 interface format
Single +3.3-volt power supply
144-pin PQFP package (fine pitch)
The μPD98404 implements the Asynchronous Transfer Mode (ATM) Transmission Convergence (TC)
sublayer function. The μPD98404 maps 53-byte ATM cells asynchronously into a synchronous
SONET/SDH payload, extracts ATM cells from a synchronous payload envelope, and provides ATM
cells to the ATM layer.
D E S C R I P T I O N
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