Cirrus-logic CS8900A Manual de usuario descargar pdf (Pagina 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

Rx128 set and

RxDest cleared.

Host may read first

128 received bytes.

Yes

Discard Frame

RxDest set.

Host may read the DA

(first 6 received bytes).

Figure 22. Early Interrupt Generation

1 2 ... 79 80 81 82 83 84 85 86 87 88 89 ... 137 138

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Cirrus-logic CS8900A Manual de usuario Pagina 84

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