PMC-Sierra, Inc.
S
TANDARD
P
RODUCT
PM5346 S/UNI-LITE
ISSUE 6
SATURN USER NETWORK INTERFACE
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APPLICATION EXAMPLES
The PM5346 S/UNI-LITE is typically used to implement the core of an ATM User
Network Interface by which an ATM terminal is linked to an ATM switching system
using SONET/SDH compatible transport.
The S/UNI-LITE finds application at either end of terminal to switch links or switch to
switch links, both in private network (LAN) and public network (WAN) situations. In
this application, the S/UNI-LITE typically interfaces on its line side with a line
receiver/equalizer and a line driver.
The S/UNI-LITE may be loop timed internally (the recovered clock is used in the
transmit direction) or source timed (separate transmit and receive clocks). The drop
side interfaces directly with ATM adaptation layer or ATM layer processors. The
initial configuration and ongoing control and monitoring of the S/UNI-LITE is
provided via a generic microprocessor interface. The S/UNI-LITE also supports a
"hardware-only" operating mode where an external microprocessor is not required.
This application is shown in Figure 1.
Fig. 1
Typical ATM Adapter Interface
TXPRTY
TDAT[7:0]
TSOC
TFCLK
TWRENB
TCA
Line Driver
&
Transformer
TXD+/-
Transmit
AAL
Processor
ATM Terminal
Transformer
&
Line Receiver
PM5346
S/UNI-LITE
SATURN
USER NETWORK
INTERFACE
RXD+/-
RCA
RXPRTY
RDAT[7:0]
RSOC
RRDENB
RFCLK
Receive
AAL
Processor
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4
PMC [ PMC-SIERRA, INC ]
