PM7375-SC datasheet(211/430 Pages) PMC

211 / 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

195

CINPORT_PR:

The CINPORT_PR bit selects the priority of the multipurpose port. When

CINPORT_PR is set to logic one and CINPORT_EN is set to logic one, cells

sourced by the multipurpose port take priority over cells (segmented packets)

sourced from the PCI Host. When CINPORT_PR is set to logic zero and

CINPORT_EN is set to logic one, cells sourced from the PCI Host take priority

over cells scheduled by the multipurpose port. When CINPORT_EN is set to

logic zero, CINPORT_PR is ignored.

CINPORT_EN:

The CINPORT_EN bit enables the multipurpose port. When CINPORT_EN is set

to logic one, the TALP block allows cells to be sourced from the multipurpose

port. When CINPORT_EN is set to logic zero, cells can only be sourced from the

PCI Host.

It should be noted that the state of the CINPORT_EN bit should be set

when the LASAR-155 is initially configured after reset. Enabling or disabling the

multipurpose port while it is processing cells can cause erroneous behavior.

AGG_PR_EN:

The AGG_PR_EN bit enables control of cell transmission rate of the aggregate

traffic sourced from the PCI Host. When AGG_PR_EN is set to logic one,

aggregate rate enforcement is enabled. When AGG_PR_EN is logic zero,

aggregate rate enforcement is not enforced. Actual rates can be programmed

using the TALP Aggregate Peak Cell Rate and TALP Aggregate Bucket Capacity

registers.

When the TALP Aggregate Peak Cell Rate and TALP Aggregate Bucket

Capacity registers are being modified, the AGG_PR_EN bit should be set to zero

to disable rate enforcement.

CIN_PR_EN:

The CIN_PR_EN bit enables control of cell transmission rate of the traffic

sourced from the multipurpose port. When CIN_PR_EN is set to logic one, rate

enforcement is enabled. When CIN_PR_EN is logic zero, rate enforcement is not

enforced. Actual rates can be programmed using the TALP Multipurpose Port

Peak Cell Rate and TALP Multipurpose Port Bucket Capacity registers.

When the TALP Multipurpose Port Peak Cell Rate and TALP Multipurpose

Port Bucket Capacity registers are being modified, the CIN_PR_EN bit should be

set to zero to disable rate enforcement.

PM7375-SC Datasheet(PDF) 211 Page - PMC-Sierra, Inc

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