PM7367 datasheet(36/323 Pages) PMC

36 / 323 page

PM7367 FREEDM-32P32

DATA SHEET

PMC-1991499

ISSUE 2

FRAME ENGINE AND DATA LINK MANAGER

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

Pin Name

Type

No.

Function

PERRB

I/O

L19

The active low parity error signal (PERRB)

indicates a parity error over the AD[31:0] and

C/BEB[3:0] buses. Parity error is signalled

when even parity calculations do not match the

PAR signal. PERRB is set low at the cycle

immediately following an offending PAR cycle.

PERRB is set high when no parity error is

detected.

PERRB is enabled by setting the PERREN bit in

the Control/Status register in the PCI

Configuration registers space. Regardless of

the setting of PERREN, parity errors are always

reported by the PERR bit in the Control/Status

space.

PERRB is updated on the rising edge of

PCICLK.

SERRB

Output

M20

The active low system error signal (SERRB)

indicates an address parity error. Address parity

errors are detected when the even parity

calculations during the address phase do not

match the PAR signal. When the FREEDM-

32P32 detects a system error, SERRB is set low

for one PCICLK period.

SERRB is enabled by setting the SERREN bit in

the Control/Status register in the PCI

Configuration registers space. Regardless of

the setting of SERREN, parity errors are always

reported by the SERR bit in the Control/Status

space.

SERRB is an open drain output and is updated

on the rising edge of PCICLK.

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