PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
In a typical Packet over SONET application (i.e. using the PPP protocol) 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 a data
link layer processor using a SATURN POS-PHY Level 3 32-bit (clocked up to 104 MHz)
synchronous FIFO interface over which packets are transferred. The initial configuration and
ongoing control and monitoring of the S/UNI-2488 are normally provided via a generic
microprocessor interface.
Figure 2: STS-48 (STM-16-16c) Packet over SONET (POS-PHY Level 3) Router Application
Link Layer
Device
PM5381
S/UNI-2488
TFCLK
TFCLK
TENB
DTP
A
TENB
DTPA
TSOP
TSOP
TPRTY
TPRTY
TDAT[31:0]
TMOD[1:0]
TEOP
TDAT[31:0]
TMOD[1:0]
TEOP
TERR
TERR
RXD+/-
SD
Optical
Transceiver
RFCLK
RENB
RSX
RFCLK
RENB
TXD+/-
RSX
RSOP
RSOP
1
POSL3_UL3B
RPRTY
RPRTY
RDAT[31:0]
RMOD[1:0]
REOP
RDAT[31:0]
RMOD[1:0]
REOP
RERR
RERR
RVAL
RVAL
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
12
PMC [ PMC-SIERRA, INC ]
