PM5357-BI datasheet(42/307 Pages) PMC

42 / 307 page

RELEASED

S/UNI-622-MAX

PMC-Sierra, Inc.

PM5356

S/UNI-622-MAX

DATASHEET

PMC-1980589

ISSUE 6

SATURN USER NETWORK INTERFACE (622-MAX)

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

Pin Name

Type

No.

Function

A[8]

Input

D11

The test register select (A[8]) signal selects between

normal and test mode register accesses. A[8] is high

during test mode register accesses, and is low during

normal mode register accesses. A[8] may be tied

low.

RSTB

Input

B10

The active-low reset (RSTB) signal provides an

asynchronous S/UNI-622-MAX reset. RSTB is a

Schmitt triggered input with an integral pull-up

resistor.

CSB must be held high when RSTB is low in order to

properly reset this chip.

ALE

Input

A10

The address latch enable (ALE) is active-high and

latches the address bus A[8:0] when low. When ALE

is high, the internal address latches are transparent.

It allows the S/UNI-622-MAX to interface to a

multiplexed address/data bus. ALE has an integral

pull-up resistor.

INTB

Output

C14

The active-low interrupt (INTB) signal is set low when

a S/UNI-622-MAX interrupt source is active and that

source is unmasked. The S/UNI-622-MAX may be

enabled to report many alarms or events via

interrupts.

Examples of interrupt sources are loss of signal

(LOS), loss of frame (LOF), line AIS, line remote

defect indication (LRDI) detect, loss of pointer (LOP),

path AIS, path remote defect indication and others.

INTB is tri-stated when the all enabled interrupt

sources are acknowledged via an appropriate register

access. INTB is an open drain output.

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