PM7367 datasheet(29/323 Pages) PMC

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PM7367 FREEDM-32P32

DATA SHEET

PMC-1991499

ISSUE 2

FRAME ENGINE AND DATA LINK MANAGER

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

Pin Name

Type

No.

Function

AD[31]

I/O

D19

As an output bus, AD[31:0] is updated on the

rising edge of PCICLK. As an input bus,

AD[31:0] is sampled on the rising edge of

PCICLK.

C/BEB[0]

C/BEB[1]

C/BEB[2]

C/BEB[3]

I/O

R19

M18

J20

G18

The PCI bus command and byte enable bus

(C/BEB[3:0]) contains the bus command or the

byte valid indications. During the first clock

cycle of a transaction, C/BEB[3:0] contains the

bus command code. For subsequent clock

cycles, C/BEB[3:0] identifies which bytes on the

AD[31:0] bus carry valid data. C/BEB[3] is

associated with byte 3 (AD[31:24]) while

C/BEB[0] is associated with byte 0 (AD[7:0]).

When C/BEB[n] is set high, the associated byte

is invalid. When C/BEB[n] is set low, the

associated byte is valid.

When the FREEDM-32P32 is the initiator,

C/BEB[3:0] is an output bus.

When the FREEDM-32P32 is the target,

C/BEB[3:0] is an input bus.

When the FREEDM-32P32 is not involved in

the current transaction, C/BEB[3:0] is tri-stated.

As an output bus, C/BEB[3:0] is updated on the

rising edge of PCICLK. As an input bus,

C/BEB[3:0] is sampled on the rising edge of

PCICLK.

PM7367 Datasheet(PDF) 29 Page - PMC-Sierra, Inc

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