PMC-Sierra, Inc.
STANDARD PRODUCT
PM5945 -UTP5
PMC-940202 ISSUE 2. APRIL 7, 1995
APP_SAPI_UTP5
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FUNCTIONAL DESCRIPTION
Block Diagram
UTOPIA Edge Connector Interface
TXCI-
TXCI+
Rx
FIFO
TXD+
LOS Generate
TXD-
POCLK
CLK
OPAL
RSER
SD
PICLK
I/O
O
I
TXD+/-
RXD+/-
PIN[7:0]
/Loop
TClk+
TClk-
Tout+
Tx+
Tx
Tout-
Rx+
Rx-
TSer+
TSer-
GPIN
/LFI
RClk+
RClk-
RXC+
RXC-
Rin+
Rin-
RXD+
RXD-
RSer+
Rser-
ID ROM
RefClk+ RefClk-
19.44 MHz
Osc
S/UNI
The S/UNI is a monolithic integrated circuit that implements the SONET/SDH
processing and ATM mapping functions of a 155 Mbit/s SONET STS-3c User
Network Interface. It is the heart of the SAPI-UTP5 board; all traffic goes through the
S/UNI. On the line side, the S/UNI transmits SONET frames through the line
interface and receives frames from the line interface. On the drop side, the S/UNI
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PMC [ PMC-SIERRA, INC ]
