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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
7
5
APPLICATION EXAMPLES
The PM5349 S/UNI-QUAD is intended for use in equipment implementing
Asynchronous Transfer Mode (ATM) User-Network Interfaces (UNI). The S/UNI-
QUAD may find application at either end of switch-to-switch links or switch-to-
terminal links. The S/UNI-QUAD performs the mapping of ATM cells into the
SONET/SDH STS-3c (STM-1) synchronous payload envelope (SPE) and
processes applicable SONET/SDH section, line and path overhead.
In a typical STS-3c (STM-1) ATM application, the S/UNI-QUAD performs clock
and data recovery for the receive direction and clock synthesis for the transmit
direction of the line interface. On the system side, the S/UNI-QUAD interfaces
directly with ATM layer processors and switching or adaptation functions using a
Utopia Level 2 compliant synchronous FIFO style interface. The initial
configuration and ongoing control and monitoring of the S/UNI-QUAD are
normally provided via a generic microprocessor interface. This application is
shown in Figure 1.
Figure 1: Typical STS-3c (STM-1) ATM Switch Port Application
TxClk
TxEnb
TxPrt
y
TxAddr<4:0>
TxClav
TxSOC
TxData<15:0>
RxClk
RxEnb
RxPrt
y
RxAddr<4:0>
RxClav
RxSOC
RxData<15:0>
ATM La
y
er Device
TFCLK
TENB
TPRTY
TADR
[
4:0
]
TCA
TSOC
TDAT
[
15:0
]
RFCLK
RENB
RPRTY
RADR
[
4:0
]
RCA
RSOC
RDAT
[
15:0
]
PM5349
S/UNI-155-QUAD
Uto
p
ia Level 2
Interface
Optical
Transceiver
RXD1+/-
TXD1+/-
SD1
Optical
Transceiver
RXD2+/-
TXD2+/-
SD2
Optical
Transceiver
RXD3+/-
TXD3+/-
SD3
Optical
Transceiver
RXD4+/-
TXD4+/-
SD4