PM5945 데이터 시트보기 (PDF) - PMC-Sierra

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PM5945

SONET ATM PHYSICAL INTERFACE BOARD

PMC-Sierra 

S TANDARD PRODUCT

PMC-Sierra, Inc.

PM5945 SAPI

PMC-940106 ISSUE 3, May 16, 1994

SAPI DAUGHTERBOARD

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FUNCTIONAL DESCRIPTION

Block Diagram

UTOPIA Edge Connector Interface

Rx

FIFO

TXCI+

TXCI-

TXD+

TXD-

POCLK

SUNI RSER

PICLK

PIN[7:0]

ID ROM

GPIN

RXC+

RXC-

RXD+

RXD-

LOS Generate

CLK

PAL

O

I/O

I

O

TClk+

TClk-

/Loop

Tout+

Tout-

TSer+

TSer-

/LFI

RClk+

RClk-

Rin+

CY7B951

RSer+

Rin-

Rser-

RefClk+ RefClk-

19.44 MHz

Osc

SD

Optics

Tx+

Tx-

Rx+

Rx-

TXD+/-

RXD+/-

SUNI

The SUNI 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 board; all traffic goes through the SUNI.

On the line side, the SUNI transmits SONET frames through the line interface and

receives frames from the line interface. On the drop side, the SUNI sinks cells

provided by the buffer interface and sources cells to the buffer interface. Below, the

SUNI is briefly described.

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