RELEASED
PM7366 FREEDM-8
DATA SHEET
PMC-1970930
ISSUE 4
FRAME ENGINE AND DATA LINK MANAGER
Pin Name
Type
Pin No.
Function
-PI
-BI
IRDYB
I/O
K18
K3
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.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
19
PMC [ PMC-SIERRA, INC ]
