RELEASED
PM7380 FREEDM-32P672
DATA SHEET
PMC-1990262
ISSUE 5
FRAME ENGINE AND DATA LINK MANAGER 32P672
Pin Name Type
TRDYB I/O
Pin
Function
No.
R3
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-32P672 is the initiator,
TRDYB is an input.
When the FREEDM-32P672 is the target,
TRDYB is an output. During accesses to
FREEDM-32P672 registers, TRDYB is set high
to extend data phases over multiple PCICLK
cycles.
When the FREEDM-32P672 is not involved in
the current transaction, TRDYB is tristated.
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.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
26
PMC [ PMC-SIERRA, INC ]
