PM7366-PI datasheet(31/286 Pages) PMC

31 / 286 page

RELEASED

PM7366 FREEDM-8

DATA SHEET

PMC-1970930

ISSUE 4

FRAME ENGINE AND DATA LINK MANAGER

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

Pin No.

Pin Name

Type

-PI

-BI

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-8 is the initiator, TRDYB is an

input.

When the FREEDM-8 is the target, TRDYB is an

output. During accesses to FREEDM-8 registers,

TRDYB is set high to extend data phases over

multiple PCICLK cycles.

When the FREEDM-8 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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