PM7341 datasheet(59/413 Pages) PMC

59 / 413 page

PRELIMINARY

INVERSE MULTIPLEXING OVER ATM

PM7341 S/UNI-IMA-84

DATASHEET

PMC-2000223

ISSUE 4

INVERSE MULTIPLEXING OVER ATM

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

Pin Name

Type

No.

Function

DDP

Input

The Drop Bus Data Parity (DDP) signal carries the

even or odd parity for the drop bus signals. The

parity calculation encompasses DDATA[7:0], DPL,

and DV5 signals.

The selection of even or odd parity is made via the

SBI_PAR_CTL bit of SBI Extract Control Register.

Multiple PHY-devices can drive this signal at

uniquely assigned tributary columns within the SBI

BUS structure. This parity signal is intended to

detect multiple sources in the column assignment.

The DDP input signal is sampled on the rising edge

of REFCLK.

DPL

Input

The Active High Drop Bus Payload (DPL) is an

active high signal that indicates valid data within the

SBI BUS structure. This signal is asserted during all

octets making up a tributary. This signal goes high

during the V3 octet within a tributary to

accommodate negative timing adjustments between

the tributary rate and the fixed SBI BUS structure.

This signal goes low during the octet after the V3

octet within a tributary to accommodate positive

timing adjustments between the tributary rate and

the fixed SBI BUS structure.

Multiple PHY-devices can drive this signal at

uniquely assigned tributary columns within the SBI

BUS structure.

The DPL input signal is sampled on the rising edge

of REFCLK.

PM7341 Datasheet(PDF) 59 Page - PMC-Sierra, Inc

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