LAN83C171 Ver la hoja de datos (PDF) - SMSC -> Microchip

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LAN83C171

EPIC/XF ACPI/PC 97 Compliant Integrated PCI 10/100 Mbps Fast Ethernet Controller

SMSC -> Microchip 

TX LENGTH/STATUS

BUFFER ADDRESS

CONTROL/BUF LENGTH

NEXT DESCR. ADDRESS

FRAME 1 STATUS

TX LENGTH/STATUS

BUFFER ADDRESS

CONTROL/BUF LENGTH

NEXT DESCR. ADDRESS

FRAME 2 STATUS

TX LENGTH/STATUS

BUFFER ADDRESS

CONTROL/BUF LENGTH

NEXT DESCR. ADDRESS

FRAGLIST = 1

NUMBER FRAGS

FRAG1 ADDRESS

FRAG1 LENGTH

FRAGn ADDRESS

FRAGn LENGTH

LFORM = 0

FRAME DATA

FRAME DATA

FRAME 1

FRAME DATA

FRAME DATA

FRAME 2

FIGURE 3 - TRANSMIT BUFFER STRUCTURE

The software may add transmit frames to the

queue at any time. If the transmit process is

already running (TXQUEUED may still be set)

then all of the descriptor and fragment list fields

for the new frame must be valid BEFORE the

ownership bit in the first descriptor is set. After

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