PM7367 datasheet(31/323 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

TRDYB

I/O

K19

The active low target ready signal (TRDYB)

indicates when the target is ready to start or

continue with a transaction. TRDYB works in

conjunction with IRDYB to complete transaction

data phases. During a transaction in progress,

TRDYB is set high to indicate that the target

cannot complete the current data phase and to

force a wait state. TRDYB is set low to indicate

that the target can complete the current data

phase. The data phase is completed when

TRDYB is set low and the initiator ready signal

(IRDYB) is also set low.

When the FREEDM-32P32 is the initiator,

TRDYB is an input.

When the FREEDM-32P32 is the target,

TRDYB is an output. During accesses to

FREEDM-32P32 registers, TRDYB is set high to

extend data phases over multiple PCICLK

cycles.

When the FREEDM-32P32 is not involved in

the current transaction, TRDYB is tri-stated.

As an output signal, TRDYB is updated on the

rising edge of PCICLK. As an input signal,

TRDYB is sampled on the rising edge of

PCICLK.

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