Cirrus Logic CS8900A - Manual (Page 84)

84 DS271F5
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
EOF
Received?
128 bytes
Received?
EOF
Received?
64 bytes
Received?
EOF
Received?
Receive Frame
RxDest cleared
and Runt set.
If RuntA is set,
frame accepted and
Host may read frame.
RxDest cleared and
RxOK or CRCerror
set, as appropriate.
If RxOKA or CRCerrorA
is set, frame accepted and
Host may read frame.
Rx128 cleared and
RxOK, CRCerror or
Extradata set, as
appropriate. If ExtradataA,
RxOKA or CRCerrorA is
set, frame is accepted and
Host may read frame.
DA Filter
Passed? Yes No
Yes
No
No
Yes
Yes
No
No
Yes
Rx128 set and
RxDest cleared.
Host may read first
128 received bytes.
Yes
No
Discard Frame
RxDest set.
Host may read the DA
(first 6 received bytes).
Figure 22. Early Interrupt Generation