PM7384 FREEDM-84P672
DATA SHEET
PMC-1990445
ISSUE 5
FRAME ENGINE AND DATA LINK MANAGER 84P672
RPQSFI:
The receive packet descriptor small buffer free queue cache read interrupt
status bit (RPQSFI) reports receive packet descriptor small free queue cache
read interrupts to the PCI host. RPQSFI is set high when the programmable
number of RPDR blocks is read from the RPDR Small Buffer Free Queue.
RPQSFI remains valid when interrupts are disabled and may be polled to
detect RPDR small buffer free queue cache read events.
RPQLFI:
The receive packet descriptor large buffer free queue cache read interrupt
status bit (RPQLFI) reports receive packet descriptor large free queue cache
read interrupts to the PCI host. RPQLFI is set high when the programmable
number of RPDR blocks is read from the RPDR Large Buffer Free Queue.
RPQLFI remains valid when interrupts are disabled and may be polled to
detect RPDR large buffer free queue cache read events.
RPQRDYI:
The receive packet descriptor ready queue write interrupt status bit
(RPQRDYI) reports receive packet descriptor ready queue write interrupts to
the PCI host. RPQRDYI is set high when the programmable number of
RPDRs is written to the RPDR Ready Queue. RPQRDYI remains valid when
interrupts are disabled and may be polled to detect RPDR ready queue write
events.
RPDFQEI:
The receive packet descriptor free queue error interrupt status bit (RPDFQEI)
reports receive packet descriptor free queue error interrupts to the PCI host.
RPDFQEI is set high upon attempts to retrieve an RPDR when both the large
buffer and small buffer free queues are empty. RPDFQEI remains valid when
interrupts are disabled and may be polled to detect RPDR free queue empty
error events.
RPDRQEI:
The receive packet descriptor ready queue error interrupt status bit
(RPDRQEI) reports receive packet descriptor ready queue error interrupts to
the PCI host. RPDRQEI is set high upon attempts to write an RPDR when
ready queue is ready full. RPDRQEI remains valid when interrupts are
disabled and may be polled to detect RPDR ready queue full error events.
TDQFI:
The transmit packet descriptor free queue write interrupt status bit (TDQFI)
reports transmit packet descriptor free queue write interrupts to the PCI host.
TDQFI is set high when the programmable number of TDRs is written to the
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
96
PMC [ PMC-SIERRA, INC ]
