PM7366-PI datasheet(32/286 Pages) PMC

32 / 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

IRDYB

I/O

K18

The active low initiator ready (IRDYB) signal is used

to indicate whether the initiator is ready to start or

continue with a transaction. IRDYB works in

conjunction with TRDYB to complete transaction data

phases. When IRDYB is set high and a transaction is

in progress, the initiator is indicating it cannot

complete the current data phase and is forcing a wait

state. When IRDYB is set low and a transaction is in

progress, the initiator is indicating it has completed

the current data phase. The data phase is completed

when IRDYB is set low and the target ready signal

(IRDYB) is also set low.

When the FREEDM-8 is the initiator, IRDYB is an

output.

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

input.

When the FREEDM-8 is not involved in the current

transaction, IRDYB is tri-stated.

IRDYB is updated on the rising edge of PCICLK or

sampled on the rising edge of PCICLK depending on

whether it is an output or an input.

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