Cirrus Logic CS8900A - Manual (Page 79)

DS271F5 79
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
An enabled interrupt occurs.
The selected interrupt
request pin is driven high
(active) if not already high.
ISQ = 0000h?
Yes
The host reads the ISQ.
The selected interrupt
request pin is driven low.
No
Process applicable
RxEvent bits: Extradata,
Runt, CRCerror, RxOK.
Process applicable
TxEvent bits: 16coll, Jabber,
Out-of-window, TxOK.
Process applicable BufEvent
bits: RxDest, Rx128, RxMiss,
TxUnderrun, Rdy4Tx,
RxDMAFrame, SWint.
Process RxMISS counter.
Process TxCOL counter.
Which
Event
report
type?
RxEvent
TxEvent
BufEvent
RxMISS
TxCOL
None of the above
Service
Default
EXIT.
Interrupts
re-enabled.
(Interrupts
will be
disabled
for at least
1.6 us.)
Figure 19. Interrupt Status Queue