PM7341 datasheet(63/413 Pages) PMC

63 / 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

AACTIVE

Output

The Add Bus Active Indicator (AACTIVE) is an

active high signal that is asserted during all octets

when driving data and control signals - ADATA[7:0],

ADP, APL and AV5 – onto the Add bus.

All other SBI Link Layer devices (e.g., other S/UNI-

IMA-84s on the SBI bus) driving the Add bus listen to

this signal to detect multiple sources driving the Add

bus, which can occur due to configuration problems

The AACTIVE output is asserted on the rising edge

of REFCLK.

ADETECT

Input

The Add Bus Active Detector (ADETECT) signal

indicates when another device is driving the Add

bus. Other Link Layer device AACTIVE outputs can

be externally OR’ed together and connected to

ADETECT.

When the S/UNI-IMA-84 is driving AACTIVE high

and simultaneously detects ADETECT is high, it

tristates its Add bus outputs to minimize or eliminate

contention.

ADETECT is an asynchronous signal which is used

to disable the tristate drivers on the ADD bus. The

AND of AACTIVE and ADETECT is used. to indicate

that a collision has occurred.

This input must be tied low when not used.

9.9 General (5 signals)

Pin Name

Type Pin

No.

Function

RSTB

Input

AE22

The Reset Bar (RSTB) is an active low signal that

provides an asynchronous S/UNI-IMA-84 reset.

RSTB is a Schmitt-triggered input with an internal

pull-up resistor.

PM7341 Datasheet(PDF) 63 Page - PMC-Sierra, Inc

PM7341 Datasheet(HTML) 63 Page - PMC-Sierra, Inc

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