PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 40

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

5
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
ATM Layer Device
S/UNI-ATLAS3200
Application Examples
The PM5381 S/UNI-2488® device is applicable to equipment implementing Asynchronous
Transfer Mode (ATM) User-Network Interfaces (UNI), ATM Network-Network Interfaces (NNI),
as well as Packet over SONET (POS) interfaces. The POS interface can support several packet
based protocols including the Point-to-Point Protocol (PPP). The S/UNI-2488 may find
application at either end of switch-to-switch links, router to router links, switch to router links or
switch-to-terminal links in public and private wide area networks (WAN). The S/UNI-2488
provides a comprehensive feature set as well as compatibility with WAN synchronization
requirements. The S/UNI-2488 performs the mapping of either ATM cells or POS frames into the
SONET/SDH STS-48 (STM-16-16c) synchronous payload envelope (SPE) and processes
applicable SONET/SDH section, line and path overheads.
In a typical STS-48 (STM-16-16c) ATM application, the S/UNI-2488 performs clock and data
recovery in the receive direction and clock synthesis in the transmit direction of the line interface.
On the system side, the S/UNI-2488 interfaces directly with ATM layer processors and switching
or adaptation functions using a UTOPIA Level 3 compliant 32-bit (clocked up to 104 MHz)
synchronous FIFO style interface. An application with a UTOPIA Level 3 system side interface
is shown in Figure 1. The initial configuration and ongoing control and monitoring of the S/UNI-
2488 are normally provided via a generic microprocessor interface.
Figure 1 STS-48 (STM-16-16c) ATM (UTOPIA Level 3) Switch Port Application
PM7325
RxData[31:0]
TxData[31:0]
RxSOC
TxSOC
RxClav
TxClav
RxPrty
RxEnb
TxPrty
TxEnb
RxClk
TxClk
TFCLK
TENB
TCA
TSOC
TPRTY
TDAT[31:0]
RFCLK
RENB
RCA
RSOC
RPRTY
RDAT[31:0]
S/UNI-2488
PM5381
POSL3_UL3B
RXD_P/_N
TXD_P/_N
S/UNI-2488 Telecom Standard Product Datasheet
SD
0
Transceiver
Optical
Released
40