AM79C90 데이터 시트보기 (PDF) - Advanced Micro Devices

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AM79C90

CMOS Local Area Network Controller for Ethernet (C-LANCE)

Advanced Micro Devices 

PRELIMINARY

AMD

Initialization

Block

Transmit Descriptor for 1st Data Buffer

Transmit Descriptor for 2nd Data Buffer

Transmit Descriptor for 3rd Data Buffer

Transmit Descriptor for Nth Data Buffer

Transmit

Descriptor

Ring

(4 words

per entry)

Receive Descriptor for 1st Data Buffer

Receive Descriptor for 2nd Data Buffer

Receive Descriptor for 3rd Data Buffer

Receive Descriptor for Nth Data Buffer

Receive

Descriptor

Ring

(4 words

per entry)

Transmit Data Buffer #1

Transmit Data Buffer #2

Transmit Data Buffer #3

Transmit

Data

Buffers

Transmit Data Buffer #N

Receive Data Buffer #1

Receive Data Buffer #2

Receive Data Buffer #3

Receive

Data

Buffers

Receive Data Buffer #N

Figure 2-1. C-LANCE/Processor Memory Interface

17881B-7

Am79C90

11

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