PM7375-SC datasheet(20/430 Pages) PMC

20 / 430 page

PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

APPLICATION EXAMPLES

The LASAR-155™ is typically used to implement the core of a SONET or SDH

STS-3c/STM-1 or SONET STS-1 ATM User Network Interface by which an ATM

terminal is linked to an ATM switching system. The LASAR-155 can be used in a

network interface card (NIC) or directly on a mother board. Though targeted for a

PCI bus based system, the LASAR-155 can also be used with other host buses

using external glue logic.

On the line side, the LASAR-155 is typically interfaced to UTP-5 twisted pair wiring

via a line receiver, a line driver and transformers. The line receiver should perform

fixed equalization and DC restoration for good bit error rate performance.

Alternatively, the LASAR-155 can be directly connected to an optical datalink. If

required, the LASAR-155 can be loop-timed where the recovered clock is used as

the transmit clock.

On the system side, the LASAR-155 can be directly attached to a PCI bus via the

packet port. An internal DMA controller is provided to support packet segmentation

from packet memory and reassembly to packet memory totally independent of the

PCI Host. PCI Host notification of segmentation and/or reassembly completion can

be on a per packet basis or on a multi packet basis.

The initial configuration and ongoing control and monitoring of the LASAR-155 can

be provided either via the generic microprocessor interface when in slave mode, the

PCI bus packet port when in master mode, or through a combination of both.

In addition, the LASAR-155 can interface to an external PHY device using the

SCI-PHY/Utopia port. The generic microprocessor interface can be configured in

master mode for configuration and ongoing control and monitoring. When this mode

of operation is selected an optional EPROM can also be supported by the generic

microprocessor interface.

PM7375-SC Datasheet(PDF) 20 Page - PMC-Sierra, Inc