CS8900A
Crystal LAN™ ISA Ethernet Controller
An enabled interrupt occurs.
The selected interrupt
request pin is driven high
(active) if not already high.
The host reads the ISQ.
The selected interrupt
request pin is driven low.
EXIT.
Interrupts
re-enabled.
(Interrupts
will be
disabled
for at least
1.6 us.)
Yes
ISQ = 0000h?
No
Process applicable
RxEvent bits: Extradata,
Runt, CRCerror, RxOK.
RxEvent
TxEvent
Process applicable
TxEvent bits: 16coll, Jabber,
Out-of-window, TxOK.
Which
Event
report
type?
Process applicable BufEvent
bits: RxDest, Rx128, RxMiss,
TxUnderrun, Rdy4Tx,
BufEvent
RxDMAFrame, SWint.
RxMISS
TxCOL
Process RxMISS counter.
Process TxCOL counter.
None of the above
Service
Default
Figure 19. Interrupt Status Queue
CIRRUS LOGIC PRODUCT DATA SHEET
80
DS271PP3
CIRRUS [ CIRRUS LOGIC ]
