CS8900 데이터 시트보기 (PDF) - Cirrus Logic

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CS8900

Highly-Integrated ISA Ethernet Controller

Cirrus Logic 

Receive Frame

CS8900

Yes DA Filter No

Passed?

RxDest set.

Host may read the DA

(first 6 received bytes).

Yes 64 bytes

Received?

No

Discard Frame

EOF No

Received?

Yes

RxDest cleared

and Runt set.

If RuntA is set,

frame accepted and

Host may read frame.

Yes 128 bytes

Received?

Rx128 set and

RxDest cleared.

Host may read first

128 received bytes.

No

EOF No

Received?

Yes

RxDest cleared and

RxOK or CRCerror

set, as appropriate.

If RxOKA or CRCerrorA

is set, frame accepted and

Host may read frame.

EOF No

Received?

Rx128 cleared and

RxOK, CRCerror or

Yes

Extradata set, as

appropriate. If ExtradataA,

RxOKA or CRCerrorA is

set, frame is accepted and

Host may read frame.

Figure 5.4. Early Interrupt Generation

DS150PP2

83

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