AN983 datasheet(62/91 Pages) ETC

номер детали	AN983

подробное описание детали	PCI/miniPCI-to-Ethernet LAN Controller

PDF	91 Pages

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производитель	ETC [List of Unclassifed Manufacturers]

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AN983B

PCI/miPCI Fast Ethernet Controller with integrated PHY

place the 1st packet data into host memory

issue transmit demand

FIFO-to-host memory operation (1st packet)

time

Transmit enable

place the 2nd packet data into host memory

check the next

packet

check point

FIFO-to-host memory operation (2nd packet)

transmit threshold

place the 3rd packet data into host memory

1st packet is

transmitted, check

the 3rd packet

FIFO-to-host memory operation (3rd packet)

IFG

check point

1st packet

2nd packet

handled by driver

handled by AN983B

Fig -

Transmit data flow of pre-fetch data

8.3.3 TRANSMIT EARLY INTERRUPT SCHEME

handled by driver

handled by AN983B

Host to TX-FIFO Memory

Operation

Transmit data from FIFO to Media

Normal Interrupt after Transmit

Completed

Driver return buffer to upper layer

Early Interrupt after Host to TX-

FIFO Operation Completed

Driver return buffer to upper layer

The saved time when transmit

early interrupt is implemented

time

Fig -

Transmit normal interrupt and early interrupt comparison

ADMtek Inc.

www.admtek.com.tw

Rev. 1.8

AN983 датащи(PDF) 62 Page - List of Unclassifed Manufacturers

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