PM7341 datasheet(62/413 Pages) PMC

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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

AV5

Tristate

Output

The Active High Add Bus Payload Indicator (AV5)

is an active high signal that locates the position of

the floating payload for each tributary within the add

bus structure.

The S/UNI-IMA-84 drives AV5 only at uniquely

assigned tributary columns within the SBI BUS

structure. All movements indicated by this signal are

accompanied by appropriate adjustments in the APL

signal.

The AV5 output signal is updated on the rising edge

of REFCLK.

AJUST_RE

Input

The Active High Add Bus Justification Request

(AJUST_REQ) signal is used to speed up or slow

down the S/UNI-IMA-84 which is sending data to the

PHY (e.g., TEMUX).

This active high signal indicates negative timing

adjustments when asserted high during the V3 or H3

octet, depending on the tributary type. In response to

this, the S/UNI-IMA-84 will send an extra byte in the

V3 or H3 octet of the next frame.

This signal indicates positive timing adjustments

when asserted high during the octet following the V3

or H3 octet, depending on the tributary type. The

S/UNI-IMA-84 will respond to this by not sending an

octet during the V3 or H3 octet of the next frame.

All timing adjustments from the S/UNI-IMA-84 in

response to the justification request will still set the

payload and payload indicators appropriately for

timing adjustments.

The AJUST_REQ input signal is sampled on the

rising edge of REFCLK.

PM7341 Datasheet(PDF) 62 Page - PMC-Sierra, Inc

PM7341 Datasheet(HTML) 62 Page - PMC-Sierra, Inc

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