
DATA SHEET
PM7367 FREEDM-32P32
ISSUE 2
PMC-1991499
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE
16
Pin Name
Type
Pin
No.
Function
PAR
I/O
M19
The parity signal (PAR) indicates the parity of
the AD[31:0] and C/BEB[3:0] buses. Even
parity is calculated over all 36 signals in the
buses regardless of whether any or all the bytes
on the AD[31:0] are valid. PAR always reports
the parity of the previous PCICLK cycle. Parity
errors detected by the FREEDM-32P32 are
indicated on output PERRB and in the
FREEDM-32P32 Interrupt Status register.
When the FREEDM-32P32 is the initiator, PAR
is an output for writes and an input for reads.
When the FREEDM-32P32 is the target, PAR is
an input for writes and an output for reads.
When the FREEDM-32P32 is not involved in
the current transaction, PAR is tri-stated.
As an output signal, PAR is updated on the
rising edge of PCICLK. As an input signal, PAR
is sampled on the rising edge of PCICLK.
FRAMEB
I/O
K17
The active low cycle frame signal (FRAMEB)
identifies a transaction cycle. When FRAMEB
transitions low, the start of a bus transaction is
indicated. FRAMEB remains low to define the
duration of the cycle. When FRAMEB
transitions high, the last data phase of the
current transaction is indicated.
When the FREEDM-32P32 is the initiator,
FRAMEB is an output.
When the FREEDM-32P32 is the target,
FRAMEB is an input.
When the FREEDM-32P32 is not involved in
the current transaction, FRAMEB is tri-stated.
As an output signal, FRAMEB is updated on the
rising edge of PCICLK. As an input signal,
FRAMEB is sampled on the rising edge of
PCICLK.