PM7385 datasheet(40/244 Pages) PMC

40 / 244 page

PM7385 FREEDM-84A672

DATA SHEET

PMC-1990114

ISSUE 6

84 LINK, 672 CHANNEL FRAME ENGINE AND DATA LINK MANAGER

WITH ANY-PHY PACKET INTERFACE

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

Pin Name

Type

No.

Function

WRB

Input

C15

The write strobe signal (WRB) qualifies write

accesses to the FREEDM-84A672 device.

When CSB is set low, the D[15:0] bus contents

are clocked into the addressed register on the

rising edge of WRB.

RDB

Input

B15

The read strobe signal (RDB) qualifies read

accesses to the FREEDM-84A672 device.

When CSB is set low, the FREEDM-84A672

device drives the D[15:0] bus with the contents

of the addressed register on the falling edge of

RDB.

CSB

Input

A15

The chip select signal (CSB) qualifies read/write

accesses to the FREEDM-84A672 device. The

CSB signal must be set low during read and

write accesses. When CSB is set high, the

microprocessor interface signals are ignored by

the FREEDM-84A672 device.

If CSB is not required (register accesses

controlled only by WRB and RDB) then CSB

should be connected to an inverted version of

the RSTB signal.

INTB

Open-

Drain

Output

C14

The interrupt signal (INTB) indicates that an

interrupt source is active and unmasked. When

INTB is set low, the FREEDM-84A672 device

has an active interrupt that is unmasked. When

INTB is tristate, no interrupts are active, or an

active interrupt is masked. Please refer to the

possible interrupt sources and masking.

It is the responsibility of the external

microprocessor to read the status registers in

the FREEDM-84A672 device to determine the

exact cause of the interrupt.

INTB is an open drain output.

PM7385 Datasheet(PDF) 40 Page - PMC-Sierra, Inc

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