CS8900A
Crystal LAN™ 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
RxE vent bits: Extradata,
Runt, C RC error, R xO K.
RxEvent
TxEvent
Process applicable
TxEvent bits: 16coll, Jabber,
O ut-of-window , TxO K.
W hich
Event
report
type?
P rocess a pplicable B ufEvent
bits: RxDest, Rx12 8, RxM iss,
TxUn derrun, Rdy4Tx,
BufEvent
RxD M AFram e, S W int.
RxM ISS
TxCOL
Process R xM ISS counter.
Process T xC O L counter.
None of the above
Service
Default
Figure 19. Interrupt Status Queue
CIRRUS LOGIC PRODUCT DATASHEET
DS271F4
79
CIRRUS [ CIRRUS LOGIC ]
