PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 101

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
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.
NSE-8G™ Standard Product Data Sheet
Preliminary
100