PM7344 datasheet(21/293 Pages) PMC

21 / 293 page

PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

The receive ATM cell processor section:

• Provides ATM framing using cell delineation.

• Provides cell descrambling, header check sequence (HCS) error detection,

idle/unassigned cell filtering, and accumulates the number of received

idle/unassigned cells, the number of received cells written to the FIFO, and

the number of HCS errors.

• Provides a four cell FIFO for rate decoupling between the line, and a higher

layer processing entity.

• Provides a synchronous 8-bit wide FIFO with receive byte parity generation

and timing compatible with the Saturn Compatible Interface Specification

(SCI-PHYTM) for multi-PHY interfaces.

• All four receive ATM cell processors are serviced via a single 8-bit wide multi-

PHY interface.

The transmit ATM cell processor section:

• Provides optional ATM cell scrambling, HCS generation/insertion,

programmable idle/unassigned cell insertion, diagnostics features and

accumulates transmitted cells read from the FIFO.

• Provides a four cell FIFO for rate decoupling between the line, and a higher

layer processing entity.

• Provides a synchronous 8-bit wide FIFO with transmit byte parity checking

and timing compatible with the Saturn Compatible Interface Specification

(SCI-PHYTM) for multi-PHY interfaces.

• All four transmit ATM cell processors are serviced via a single 8-bit wide

multi-PHY interface.

Loopback features:

• Provides for DS1 or E1 line loopback, payload loopback, or diagnostic

loopback.

PM7344 датащи(PDF) 21 Page - PMC-Sierra, Inc