PM7339 データシートの表示（PDF） - PMC-Sierra

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PM7339

SATURN USER NETWORK INTERFACE FOR QUAD CELL DELINEATION BLOCK

PMC-Sierra 

RELEASED

DATASHEET

PMC-2000313

ISSUE 2

PM7339 S/UNI-CDB

SATURN USER NETWORK INTERFACE CELL DELINEATION BLOCK

• Provides ATM framing using cell delineation. ATM cell delineation may

optionally be disabled to allow passing of all cell bytes regardless of cell

delineation status.

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

idle cell filtering, header descrambling (for use with PPP packets), and

accumulates the number of received idle 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. FIFO latency may be reduced by changing the

number of operational cell FIFOs.

• Provides programmable pseudo-random test-sequence detection (up to 232-

1 bit length patterns conforming to ITU-T O.151 standards) and analysis

features.

The transmitter section:

• Provides a 50 MHz 8-bit wide or 16-bit wide Utopia FIFO buffer in the transmit

path with parity support and multi-PHY (Level 2) control signals.

• Provides optional ATM cell scrambling, header scrambling (for use with PPP

packets), HCS generation/insertion, programmable idle 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. FIFO latency may be reduced by changing the

number of operational cell FIFOs.

• Provides an 8 kHz reference input for locking the transmit PLCP frame rate to

an externally applied frame reference.

• Provides programmable pseudo-random test sequence generation (up to

232-1 bit length sequences conforming to ITU-T O.151 standards).

Diagnostic abilities include single bit error insertion or error insertion at bit

error rates ranging from 10-1 to 10-7.

Loopback features:

• Provides for diagnostic loopbacks and line loopbacks.

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 7

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