PM8621 Datasheet, PDF (101/184 Pages) PMC-Sierra, Inc – NSE-8G™ Standard Product Data Sheet Preliminary

NSE-8G™ Standard Product Data Sheet
Preliminary
FUOI
The FIFO underrun/overrun event interrupt status bit (FUOI) reports and acknowledges the
FIFO underrun/overrun events for the R8TD block. FUOI is set high when R8TD detects a
that the FIFO read and write pointers are within one slot of each other. FUOI is cleared on a
read to this register when WCIMODE is logic 0. FUOI is cleared on a write (of any value) to
this register when WCIMODE is logic one. INTB is asserted low when both FUOE and
FUOI are high. IF FUOE is asserted, FUOI must be cleared before INTB will be reasserted.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
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Document ID: PMC-2010850, Issue 1